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1,045 results on '"Centrale Lille"'

1. Bus network decomposition for fault detection and isolation through power line communication

Author

Abdel Karim Abdel Karim, M. Amine Atoui, Virginie Degardin, Pierre Laly, Vincent Cocquempot, Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Télécommunication, Interférences et Compatibilité Electromagnétique - IEMN (TELICE - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Plateforme de Caractérisation Multi-Physiques - IEMN (PCMP - IEMN), This research work is done in the framework of the ELSAT2020 project which is co-financed by the European Union with the European Regional Development Fund, the French state and the Hauts-de-France Region Council, and PCMP C2EM

Subjects
Network decomposition, Applied Mathematics, Fault isolation, [SPI.TRON]Engineering Sciences [physics]/Electronics, Computer Science Applications, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Power line communication, Control and Systems Engineering, Residual, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, Electrical and Electronic Engineering, Fault detection, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Instrumentation
Abstract

International audience; This paper deals with fault detection and isolation (FDI) in complex embedded wired communication networks. The considered faults are soft faults which do not prevent the communication, but may evolve into hard faults, i.e. short or open circuit. A novel FDI method based on power line communication (PLC) transmission systems is proposed. In these PLC systems, the transmission coefficients between the source and each receiver are estimated for communication purposes using orthogonal frequency division multiplexing (OFDM). Health indicators and residuals are computed by comparing the online estimated transmission coefficients with the reference coefficients. A methodology for dealing with complex networks, such as bus networks, is proposed. It is based on the decomposition of the network into several Y-shaped sub-networks. Each of these sub-networks is monitored to detect the presence of a fault. The FDI method is first validated using real data extracted from a Y-shaped network test bench. Then, the proposed approach is validated on a more complex network using realistic simulated data.

Published
2023

2. Design of orthogonal filter banks using a multi-objective genetic algorithm for a speech coding scheme

Author

Boukhobza, Abdelkader, Taleb, Nasreddine, Taleb-Ahmed, Abdelmalik, Bounoua, Abdennacer, Université Hassiba Ben Bouali de Chlef (UHBC), Université Djilali Liabès [Sidi-Bel-Abbès], Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), COMmunications NUMériques - IEMN (COMNUM - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and The research being reported in this publication was supported by the Algerian Directorate General for Scientific Research and Technological Development (DGRSDT).

Subjects
[SPI]Engineering Sciences [physics], NSGAIII algorithm, Orthogonal filter banks, Speech coding, Discrete wavelet transform, General Engineering, Optimized wavelet, TA1-2040, Engineering (General). Civil engineering (General)
Abstract

International audience; In this work, we propose an optimization scheme based on a multi-objective Genetic Algorithm (GA) for the design of orthogonal filter banks for speech compression. A parameterization is adopted to assure that the resulting filter banks satisfy perfect reconstruction and have at least two vanishing moments. We search for a parameter set that optimizes the coding gain and the frequency selectivity. As the objectives are conflicting, we investigate the solution that realizes the best compromise between the objectives criteria using the Non-dominated Sorting Genetic Algorithm (NSGAIII). Experimental results have shown that the optimized filter banks provide a significant gain in coding performances when comparing with the Daubechies orthogonal filter banks for test speech signals.

Published
2022

3. Silicone/graphene oxide co-cross-linked aerogels with wide-temperature mechanical flexibility, super-hydrophobicity and flame resistance for exceptional thermal insulation and oil/water separation

Author

Zhao-Hui Zhang, Zuan-Yu Chen, Yi-Hao Tang, Yu-Tong Li, Dequan Ma, Guo-Dong Zhang, Rabah Boukherroub, Cheng-Fei Cao, Li-Xiu Gong, Pingan Song, Kun Cao, Long-Cheng Tang, Hangzhou Normal University, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), University of Southern Queensland (USQ), and This work was financially supported by the National Natural Science Foundation of China (Nos. 51973047 and 12002112), the Science Foundation and Technology Project of Zhejiang Province (No. Z22E035302), the Science Foundation and Technology Project of Shandong Province (No. ZR2020LFG004), and the Project for Science and Technology Program of Hangzhou (Nos. 20191203B16 and 20201203B136).

Subjects
Functionalized graphene oxide, [SPI]Engineering Sciences [physics], Polymers and Plastics, Mechanical robustness, Mechanics of Materials, Mechanical Engineering, Materials Chemistry, Metals and Alloys, Ceramics and Composites, Super-hydrophobicity, Silicone composite aerogel, Flame resistance
Abstract

International audience; Development of multifunctional and high-performance silicone aerogel is highly required for various promising applications. However, unstable cross-linking structure and poor thermal stability of silicone network as well as complicated processing restrict the practical use significantly. Herein, we report a facile and versatile ambient drying strategy to fabricate lightweight, wide-temperature flexible, super-hydrophobic and flame retardant silicone composite aerogels modified with low-content functionalized graphene oxide (FGO). After optimizing silane molecules, incorporation of γ-aminopropyltriethoxysilane functionalization is found to promote the dispersion stability of GO during the hydrolysis-polymerization process and thus produce the formation of unique strip-like co-cross-linked network. Consequently, the aerogels containing ∼2.0 wt% FGO not only possess good cyclic compressive stability under strain of 70% for 100 cycles and outstanding mechanical reliability in wide temperature range (from liquid nitrogen to 350 °C), but also display excellent flame resistance and super-hydrophobicity. Further, the optimized silicone/FGO aerogels display exceptional thermal insulating performance superior to pure aerogel and hydrocarbon polymer foams, and they also show efficient oil absorption and separation capacity for various solvents and oil from water. Clearly, this work provides a new route for the rational design and development of advanced silicone composite aerogels for multifunctional applications.

Published
2022

4. Nanostructured BaTi1-xSnxO3 ferroelectric materials for electrocaloric applications and energy performance

Author

M. Benyoussef, T. Mura, S. Saitzek, F. Azrour, J.-F. Blach, A. Lahmar, Y. Gagou, M. El Marssi, A. Sayede, M. Jouiad, Laboratoire de Physique de la Matière Condensée - UR UPJV 2081 (LPMC), Université de Picardie Jules Verne (UPJV), UCCS Équipe Couches Minces & Nanomatériaux, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
General Physics and Astronomy, General Materials Science, [CHIM.MATE]Chemical Sciences/Material chemistry, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]
Abstract

International audience; Nanostructured BaTi1-xSnxO3 (x = 0, 0.05 & 0.075) were successfully synthesized using the modified Pechini processing method. The phase purity and symmetry were examined by X-ray diffraction and Raman spectroscopy. Tetragonal symmetry was obtained for BaTiO3 (BT) while orthorhombic symmetry for Sn doped BT. BT exhibits an up-shift of the Curie temperature towards high temperatures (TC = 139 °C). In contrast, a down-shift was recorded for Sn doped BT. Then, indirect electrocaloric (EC) adiabatic temperature change ΔT and the energy storage performances were determined based on ferroelectric hysteresis loops. Interestingly, large EC responsivity of ΔT/ΔE = 0.81 × 10−6 K m/V was obtained for the BT accompanied with a moderate stored energy of 23 mJ/cm3 but with a high energy efficiency of 67%. The incorporation of Sn in BT was found to broaden the EC responsivity and to improve the energy efficiency up to 90%, recorded for the 5% Sn doped BT.

Published
2022

5. Lessons from neonatal β-cell epigenomic for diabetes prevention and treatment

Author

Amar Abderrahmani, Cécile Jacovetti, Romano Regazzi, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université de Lausanne = University of Lausanne (UNIL), and This work was supported by Centre National de la Recherche Scientifique (CNRS), I-SITE ULNE ‘Sustain’ Betaprotect, the Hauts-de-France region via Start-AIRR Dermaseptine B2, the CPER P4S ‘Photonics for Society’ and by a grant from the Swiss National Science Foundation (310030-1884473 to R.R.). We warmly thank Chris Donnelly for his quality work on the graphics of the figures.

Subjects
Adult, Epigenomics, diabetes, weaning, Endocrinology, Diabetes and Metabolism, Infant, Newborn, Insulins, β-cell replication, [SPI]Engineering Sciences [physics], Endocrinology, Diabetes Mellitus, Type 2, newborn, Pregnancy, Insulin-Secreting Cells, Diabetes Mellitus, Humans, Insulin, Female, Obesity, epigenetic
Abstract

International audience; Pancreatic β-cell expansion and functional maturation during the birth-to-weaning period plays an essential role in the adaptation of plasma insulin levels to metabolic needs. These events are driven by epigenetic programs triggered by growth factors, hormones, and nutrients. These mechanisms operating in the neonatal period can be at least in part reactivated in adult life to increase the functional β-cell mass and face conditions of increased insulin demand such as obesity or pregnancy. In this review, we will highlight the importance of studying these signaling pathways and epigenetic programs to understand the causes of different forms of diabetes and to permit the design of novel therapeutic strategies to prevent and treat this metabolic disorder affecting hundreds of millions of people worldwide.

Published
2022

6. Hierarchically Porous ZIF-67/Chitosan Beads with High Surface Area and Strengthened Mechanical Properties:Application to CO2 Storage

Author

N. Hammi, N. Couzon, T. Loiseau, C. Volkringer, A. El Kadib, S. Royer, J. Dhainaut, Université de Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181, Université Euro Méditerranéenne de Fès [UEMF], Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Université Euro Méditerranéenne de Fès (UEMF)

Subjects
Renewable Energy, Sustainability and the Environment, Metal-organic framework, Chitosan beads, Shaping, CO2 adsorption, General Materials Science, General Chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.INOR]Chemical Sciences/Inorganic chemistry
Abstract

International audience; In this work, zeolitic imidazolate framework-67 (ZIF-67)/chitosan composite beads were prepared by immersing chitosan beads incorporating cobalt (hydr)oxide into a solution containing the organic linker (2-methylimidazole). Compared to the conventional preparation protocols for metal-organic framework/polymer beads, the in-situ growth approach developed herein allows obtaining higher surface area with the shaped composites, up to 1200 m2/g for ZIF-67/CS2:1. The CO2 adsorption capacity of these ZIF-67/chitosan beads was investigated and reached 1.21 mmol/g at 273 K, which represents almost 100% of the adsorption capacity of pure ZIF-67, in line with the preserved surface area despite the incorporation of the 19% of additives included. Importantly, the ZIF-67/chitosan beads with an average bulk (crush) strength of 1.57 N could be easily regenerated, with a retained efficiency above 97% after 6 cycles. Furthermore, a possible mechanism for CO2 adsorption is discussed.

Published
2023

7. Colorimetric assay for the detection of dopamine using bismuth ferrite oxide (Bi2Fe4O9) nanoparticles as an efficient peroxidase-mimic nanozyme

Author

Mehri Razavi, Alexandre Barras, Madjid Ifires, Abir Swaidan, Maryam Khoshkam, Sabine Szunerits, Mohsen Kompany-Zareh, Rabah Boukherroub, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Dalhousie University [Halifax], and The authors wish to thank the Centre National de la Recherche Scientifique (CNRS), the University of Lille, the region Hauts-de-France, the CPER 'Photonics for Society', and the Institute for Advanced Studies in Basic Sciences (IASBS) in Iran for supporting this study.

Subjects
Biomaterials, [SPI]Engineering Sciences [physics], Colloid and Surface Chemistry, [CHIM]Chemical Sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract

International audience; This work describes the preparation of ternary bismuth ferrite oxide nanoparticles (Bi2Fe4O9 NPs) with an enzyme mimetic activity for dopamine (DA) qualitative and quantitative detection. Bi2Fe4O9 NPs were prepared using a facile, low cost, and one-pot hydrothermal treatment. The chemical composition, morphology, and optical properties of Bi2Fe4O9 nanozyme were characterized using different techniques such as Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction pattern (XRD), X-ray photoelectron spectroscopy (XPS), thermo-gravimetric analysis (TGA), dynamic light scattering (DLS), field-emission scanning electron microscopy (FESEM) imaging, FESEM-energy dispersive X-ray spectroscopy (EDS), UV–vis absorption, and fluorescence emission spectroscopy. Bi2Fe4O9 NPs were utilized to catalyze the oxidation of a typical chromogenic peroxidase substrate, 3,3′,5,5′-tetramethylbenzidine (TMB), to form the blue-colored oxidized product (oxTMB), in the presence of hydrogen peroxide (H2O2). All reactions occurred in acetate buffer solution (pH 3.5) to generate hydroxyl radicals (•OH) and the kinetics were followed by UV–vis absorbance at 654 nm. The steady-state kinetic parameters were obtained from the Michaelis-Menten equation and exhibited a good catalytic efficiency of Bi2Fe4O9 NPs as enzyme mimetics. Michaelis–Menten constant (Km) values were estimated as 0.07 and 0.73 mM for TMB and H2O2, respectively. The presented method is efficient, rapid, cost-effective, and sensitive for the colorimetric detection of dopamine with a linear range (LR) from 0.15 to 50 μM and a detection limit (LOD) of 51 nM. The proposed colorimetric sensor was successfully applied for the detection of different concentrations of dopamine in spiked fetal bovine serum (FBS) and horse serum (HS) samples. It is anticipated that Bi2Fe4O9 nanozyme holds great potential in biomedical analysis and diagnostic applications of dopamine-related diseases.

Published
2022

8. Optimal scheduling strategy and benefit allocation of multiple virtual power plants based on general nash bargaining theory

Author

Xingyu Yan, Ciwei Gao, Hao Ming, Dhaker Abbes, Bruno Francois, Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 (L2EP), Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), L2EP - Équipe Réseaux, Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, and National Natural Science Foundation of China (No. 52107077, and No. 52207081)Natural Science Foundation of Jiangsu Province (BK20210244)

Subjects
[SPI]Engineering Sciences [physics], Virtual power plant, Distributed energy resources, Energy Engineering and Power Technology, Peer-to-peer trading, Smart grid, Nash bargaining, [MATH]Mathematics [math], Electrical and Electronic Engineering, Game theory
Abstract

International audience; The benefits of small-scale renewable energy resources are restricted by a feed-in-tariff strategy that works with distribution grids only. Virtual Power Plant (VPP) aggregates diverse distributed energy resources on the demand side for efficient control, which can improve their revenue and encourage the growth of renewable energy. Based on the general Nash bargaining theory, this paper proposes a multi-VPP energy-sharing mechanism. This approach enables VPPs to increase their revenue by engaging in peer-topeer energy transactions. First, a general Nash bargaining-based model is proposed for multi-VPPs energy sharing considering peer-to-peer energy transactions. The model is then decomposed into two subproblems: minimizing the total cost of the VPP energy-sharing alliance, and the cost allocation of peer-to-peer energy transactions. Considering the privacy protection of VPPs, the first subproblem is solved by a distributed algorithm based on the alternating direction multiplier method. In the second subproblem, due to the introduction of a bargaining factor that is positively related to each VPP's contribution to energy sharing alliance, the cost allocation better reflects their contribution. The numerical test demonstrates the proposed energy-sharing mechanism, with little computational complexity, delivers a cost distribution result that is comparable to the classical Shapley value while promoting the development of renewable energy resources.

Published
2023

9. BM-Seg: A new bone metastases segmentation dataset and ensemble of CNN-based segmentation approach

Author

Marwa Afnouch, Olfa Gaddour, Yosr Hentati, Fares Bougourzi, Mohamed Abid, Ihsen Alouani, Abdelmalik Taleb Ahmed, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), COMmunications NUMériques - IEMN (COMNUM - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Computer & Embedded Systems Laboratory (CES-ENIS), École Nationale d'Ingénieurs de Sfax | National School of Engineers of Sfax (ENIS), Hedi Chaker Hospital [Sfax], Istituto di Scienze Applicate e Sistemi Intelligenti 'Eduardo Caianiello' (ISASI), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Queen's University [Belfast] (QUB), and AcknowledgmentsThe authors would like to express their heartfelt gratitude to Drs. Zaineb Mnif and Hela Fendri for their helpful advice on various technical issues examined in this work, and to the Tunisian Ministry of Health for permission to conduct this study. This work was supported by the PhD School ’Sciences & Technologies’ of the National Engineering School of Sfax (ENIS) and the Computer and Embedded Systems (CES) Laboratory.

Subjects
[PHYS]Physics [physics], [SPI]Engineering Sciences [physics], Artificial Intelligence, BM-Seg, Bone metastases, Generation, General Engineering, Convolutional neural network, CT-scans, Semantic segmentation, Computer Science Applications
Abstract

International audience; A B S T R A C TIn recent years, Machine Learning approaches (ML) have shown promising results in addressing many tasks inmedical image analysis. In particular, the analysis of Bone Metastases (BM) has attracted considerable interestfrom both the medical and computer vision communities due to its critical and challenging aspect. Despitethe research efforts, the detection of BM is still an open problem, mainly due to the lack of available datasets.This is due to two main obstacles: (i) the enormous time required for data collection and annotation, and(ii) privacy constraints. To overcome these challenges, we propose BM-Seg, a new dataset for segmenting BMfrom CT-scans. Our BM-Seg dataset consists of 1517 CT images from 23 patients where BM and bone regionswere labeled by three radiologists. BM-Seg is constructed to cover the diversity of bone metastases in termsof location, organ and severity.We also propose a new CNN-based approach to segmentation of BM, presenting two main contributions.First, we introduce Hybrid-AttUnet++, a new Unet++ derived architecture with dual decoders that performssegmentation of BM and bone regions simultaneously. Second, we use an ensemble of trained HybridAttUnet++ models (EH-AttUnet++) to optimize segmentation performance. Our experiments show that theEH-AttUnet++ architecture achieves better performance compared to state-of-the-art approaches for variousevaluation metrics. The purpose of this work is to provide a benchmark dataset with new state-of-the-artperformance in bone metastasis segmentation. This will facilitate further research in this area and help to putautomatic detection and segmentation of bone metastases into practice.

Published
2023

10. Local practical stabilization for a class of discrete-time switched affine systems

Author

Khodja, Ghania, Fiter, Christophe, Hetel, Laurentiu, Floquet, Thierry, Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 [CRIStAL], Centrale Lille, Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Lille, Centre National de la Recherche Scientifique (CNRS), and I-Site ULNE - programme IKS

Subjects
switching control, Control and Systems Engineering, Switched affine systems, local practical stabilization, [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract

International audience; This paper deals with the study of discrete-time switched affine systems. While generally the literature is focused on the global (practical) stabilization problem, there are classes of switched affine systems that can be stabilized only locally. In this paper we deal with such a class of switched affine systems. More precisely, we consider switched affine systems with decoupled switching in the state matrix and the affine input term. For this particular class of systems, a switching control law is designed and conditions ensuring the system local practical stability are provided. A qualitative approach is given based on the existence of a stabilizing linear state feedback. These results are illustrated using a numerical example.

Published
2022

11. Machine learning at the service of meta-heuristics for solving combinatorial optimization problems: A state-of-the-art

Author

El-Ghazali Talbi, Mehrdad Mohammadi, Patrick Meyer, Maryam Karimi-Mamaghan, Amir Mohammad Karimi-Mamaghan, Optimisation de grande taille et calcul large échelle [BONUS], Equipe DECIDE (Lab-STICC_DECIDE), Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), Institut Mines-Télécom [Paris] (IMT)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-Institut Mines-Télécom [Paris] (IMT)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL), Département Logique des Usages, Sciences sociales et Sciences de l'Information (IMT Atlantique - LUSSI), IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), University of Tehran, Université de Lille - UFR des Humanités (Lille UFRH), Université de Lille, Optimisation de grande taille et calcul large échelle (BONUS), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 [CRIStAL], École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT), IMT Atlantique (IMT Atlantique), and Université de Lille - Faculté des Humanités (Lille Humanités)

Subjects
Service (systems architecture), Information Systems and Management, General Computer Science, Computer science, media_common.quotation_subject, 0211 other engineering and technologies, Initialization, 02 engineering and technology, Management Science and Operations Research, Machine learning, computer.software_genre, Industrial and Manufacturing Engineering, [INFO.INFO-AI]Computer Science [cs]/Artificial Intelligence [cs.AI], Robustness (computer science), Taxonomy (general), 0502 economics and business, [INFO]Computer Science [cs], Quality (business), Metaheuristic, ComputingMilieux_MISCELLANEOUS, media_common, 050210 logistics & transportation, 021103 operations research, business.industry, 05 social sciences, [INFO.INFO-RO]Computer Science [cs]/Operations Research [cs.RO], Modeling and Simulation, Key (cryptography), State (computer science), Artificial intelligence, business, computer
Abstract

International audience; Mixed Integer Linear Programs (MILPs) are usually NP-hard mathematical programming problems, which present difficulties to obtain optimal solutions in a reasonable time for large scale models. Nowadays, metaheuristics are one of the potential tools for solving this type of problems in any context. In this paper, we focus our attention on MILPs in the specific framework of Data Envelopment Analysis (DEA), where the determination of a score of technical efficiency of a set of Decision Making Units (DMUs) is one of the main objectives. In particular, we propose a new hyper-matheuristic grounded on a MILP-based decomposition in which the optimization problem is divided into two hierarchical subproblems. The new approach decomposes the model into discrete and continuous variables, treating each subproblem through different optimization methods. In particular, metaheuristics are used for dealing with the discrete variables, whereas exact methods are used for the set of continuous variables. The metaheuristics use an indirect representation that encodes an incomplete solution for the problem, whereas the exact method is applied to decode the solution and generate a complete solution. The experimental results, based on simulated data in the context of Data Envelopment Analysis, show that the solutions obtained through the new approach outperform those found by solving the problem globally using a metaheuristic method. Finally, regarding the new hyper-matheuristic scheme, the best algorithm selection is found for a set of cooperative metaheuristics ans exact optimization algorithms.

Published
2022

12. Prescribed-time control for a class of semilinear hyperbolic PDE-ODE systems

Author

Irscheid, Abdurrahman, Espitia, Nicolás, Perruquetti, Wilfrid, Rudolph, Joachim, Saarland University [Saarbrücken], Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Centrale Lille

Subjects
boundary control, nonlinear PDE-ODE systems, Control and Systems Engineering, distributed parameter systems, semilinear hyperbolic systems, prediction, prescribed-time control, [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract

International audience; A prediction-based controller is shown to achieve prescribed-time stabilization of a nonlinear infinite-dimensional system, which consists of a general boundary controlled firstorder semilinear hyperbolic PDE that is bidirectionally interconnected with nonlinear ODEs at its unactuated boundary. The approach uses a coordinate transformation to map the nonlinear system into a form suitable for control. In particular, this transformation is based on predictions of system trajectories, which can be obtained by solving a general nonlinear Volterra integrodifferential equation. Then, a prediction-based controller is designed to stabilize the system in prescribed-time. Numerical simulations illustrate the performance of both the prescribed-time controller and an asymptotically stabilizing one, which follows as a special case.

Published
2022

13. Enhancing ammonia catalytic production over spatially confined cobalt molybdenum nitride nanoparticles in SBA-15

Author

Amanda Sfeir, Camila A. Teles, Carmen Ciotonea, G.N. Manjunatha Reddy, Maya Marinova, Jérémy Dhainaut, Axel Löfberg, Jean-Philippe Dacquin, Sébastien Royer, Said Laassiri, Université de Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181, 3209|||Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Unité de Chimie Environnementale et Interactions sur le Vivant [UCEIV], Institut Chevreul - FR2638, Université Mohammed VI Polytechnique [Ben Guerir] [UM6P], Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d'Opale (ULCO), Institut Michel Eugène Chevreul - FR 2638 (IMEC), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Université Mohammed VI Polytechnique [Ben Guerir] (UM6P)

Subjects
History, nitrides, SBA-15, Polymers and Plastics, Ammonia synthesis, Process Chemistry and Technology, confined nanoparticles, [CHIM.CATA]Chemical Sciences/Catalysis, Business and International Management, Catalysis, Industrial and Manufacturing Engineering, General Environmental Science
Abstract

International audience; Ternary Co3Mo3N nitrides are reported to exhibit high catalytic activity in ammonia synthesis. However, synthesis of ternary nitrides requires thermal treatments at elevated temperatures and reactive atmospheres that lead to unavoidable surface reduction (~ 10 m2 g-1). In this work, we have developed a novel approach to improve the catalytic activity of Co3Mo3N through its dispersion into a high surface area silica-based support (SBA-15). During ammonolysis and ammonia synthesis conditions reaction, SBA-15 demonstrated good thermal and chemical stability maintaining an ordered porous structure and high surface area (> 500 m2 g-1). For application in ammonia synthesis, SBA-15 supported cobalt molybdenum catalysts with different metal loading (10, 20 and 30 wt.%) were prepared by a modified impregnation-infiltration protocol and their catalytic activity studied. The dispersion of CoMo nitride nanoparticles into SBA-15 structures resulted in the improvement of their structural and textural properties of nitrides as evidenced by XRD analysis, STEM-EDS, and N2- physisorption (e.g. 10-CoMo-N/SBA-15: 348 m2 g-1). Nevertheless, the surface composition of CoMo-N/SBA-15 catalysts was found to be similar to the non-supported Co3Mo3N. Furthermore, supported CoMo-N/SBA-15 displayed enhanced catalytic activity in ammonia synthesis (1714, 1429 and 810 μmol gactive phase-1 h-1 corresponding to the CoMo oxide loadings of 10, 20, 30 wt.% respectively) that outperform the classical Co3Mo3N catalyst (298 μmol gcatalyst-1 h-1). The results reported in this work highlights a novel approach for the design of nitride-based catalysts with superior catalytic properties in ammonia synthesis.; Les nitrures ternaires de Co3Mo3N présentent une activité catalytique élevée dans la synthèse d'ammoniac. Cependant, la synthèse de nitrures ternaires nécessite des traitements thermiques à des températures élevées et des atmosphères réactives qui conduisent à une réduction de surface inévitable (~ 10 m2 g-1). Dans ce travail, nous avons développé une nouvelle approche pour améliorer l'activité catalytique du Co3Mo3N grâce à sa dispersion dans un support à base de silice à surface élevée (SBA-15). Au cours de la réaction dans les conditions d'ammonolyse et de synthèse d'ammoniac, le SBA-15 a démontré une bonne stabilité thermique et chimique en maintenant une structure poreuse ordonnée et une surface spécifique élevée (> 500 m2 g-1). Pour une application dans la synthèse d'ammoniac, des catalyseurs au cobalt-molybdène sur support SBA-15 avec différentes charges métalliques (10, 20 et 30 % en poids) ont été préparés par un protocole d'imprégnation-infiltration modifié et leur activité catalytique étudiée. La dispersion des nanoparticules de nitrure de CoMo dans les structures SBA-15 a entraîné l'amélioration de leurs propriétés structurelles et texturales des nitrures, comme en témoignent l'analyse XRD, le STEM-EDS et la physisorption N2 (par exemple 10-CoMo-N/SBA-15 : 348 m2 g-1). Néanmoins, la composition de surface des catalyseurs CoMo-N/SBA-15 s'est avérée similaire à celle du Co3Mo3N non supporté. De plus, le CoMo-N/SBA-15 supporté a affiché une activité catalytique améliorée dans la synthèse d'ammoniac (1714, 1429 et 810 μmol gactive phase-1 h-1 correspondant aux charges d'oxyde CoMo de 10, 20, 30 % en poids respectivement) qui surpassent le catalyseur classique Co3Mo3N (298 μmol gcatalyst-1 h-1). Les résultats rapportés dans ce travail mettent en évidence une nouvelle approche pour la conception de catalyseurs à base de nitrure avec des propriétés catalytiques supérieures dans la synthèse d'ammoniac.

Published
2022

14. Effect of the process atmosphere on glass foam synthesis: A high-temperature environmental scanning electron microscopy (HT-ESEM) study

Author

Sébastien Genty, J. Lautru, Renaud Podor, Ronan Lebullenger, François O. Méar, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Etude de la Matière en Mode Environnemental (L2ME), Institut de Chimie Séparative de Marcoule (ICSM - UMR 5257), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), RecyverProject (Univ. Rennes, Univ. Lille, Ecosystemes, 2013-2015), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Sintering, chemistry.chemical_element, HT-ESEM, 02 engineering and technology, 01 natural sciences, Oxygen, Atmosphere, Glass-foam, Viscosity, 0103 physical sciences, Materials Chemistry, [CHIM]Chemical Sciences, Tube (fluid conveyance), Graphite, Environmental scanning electron microscope, 010302 applied physics, Process Chemistry and Technology, Reducing atmosphere, 021001 nanoscience & nanotechnology, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Chemical engineering, chemistry, 13. Climate action, Water steam, Ceramics and Composites, CRT glass, MnO2, 0210 nano-technology
Abstract

International audience; The effect of the process atmosphere composition on the foam formation of cathode-ray tube (CRT) glass containing graphite and MnO2 was studied using in situ environmental scanning electron microscopy at high temperature (HT-ESEM). When compared to He+4% H2, O2 or air, water steam facilitates glass grain sintering. This is probably due to the formation of hydroxyl groups at the glass grain surface that locally decrease the glass viscosity. We have shown that increasing the steam pressure from 50 Pa to 750 Pa decreases both sintering and foaming onset temperatures by approximately 100 degrees C, favouring the formation of closed pores in viscous glass. At high temperature, the presence of water steam or oxygen promotes foam formation, while the presence of a reducing atmosphere (He+4%H2) limits glass melt foaming. A synergetic effect of O2 and H2O on the onset temperature of glass sintering and foam formation is evidenced.

Published
2021

15. An efficient cobalt-nickel phosphate positive electrode for high-performance hybrid microsupercapacitors

Author

Li, Min, Jia, Chen, Zhang, Danyu, Luo, Yunyun, Ma, Yintao, Luo, Guoxi, Zhao, Libo, Wang, Lu, Li, Zhikang, Lin, Qijing, Yang, Ping, Zhu, Nan, Boukherroub, Rabah, Jiang, Zhuangde, Xi'an Jiaotong University (Xjtu), Hunan University [Changsha] (HNU), Beijing Wuzi University, National University of Singapore (NUS), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Acknowledgements This work is supported by the Shaanxi 2023 Natural Science Basic Research Plan (grant number 2023-JC-QN-0489), the National Key Research & Development (R&D) Program of China (grant number 2022YFB3205400), the National Natural Science Foundation of China (grant numbers 52175548, U1909221), and the Chongqing Natural Science Basic Research Project (cstc2021jcyj-msxmX0801). R. B. thanks the ANR for financial support of the project 'SIREVIVAL' of the LEAP-RE programme that received funding from the European Union's Horizon 2020 Research and Innovation Program under Grant Agreement 963530., and ANR-22-LERE-0003,SIREVIVAL,Dispositifs à base de Si pour les énergies renouvelables : Recyclage et renaissance des modules photovoltaïques(2022)

Subjects
[PHYS]Physics [physics], [SPI]Engineering Sciences [physics], Cobalt nickel phosphate, Microsupercapacitor, Renewable Energy, Sustainability and the Environment, Energy storage system, Carbon nanotubes, Energy Engineering and Power Technology, Electrical and Electronic Engineering, Flexible
Abstract

International audience; Flexible energy storage devices play significant role in wearable and portable electronics. Herein, a cobalt-nickel phosphate (CoNiP2O7) composite was synthesized on conductive carbon nanotubes (CNTs) substrate by facile one-step electrochemical deposition method, forming a binder-free CoNiP2O7@CNTs positive electrode for microsupercapacitors (MSCs). Combined with a CNTs substrate on the opposite side of interdigitated electrodes, a CoNiP2O7@CNTs//CNTs hybrid MSC device was assembled. It displayed good electrochemical performance with a largest areal capacitance of 20.9 mF·cm−2 at 0.08 mA·cm−2 and an energy density of 2.9 μWh·cm−2. To construct a self-powered solar cell energy storage system, the proposed MSC device was utilized for energy storage and further provided power for red light-emitting diode (LED), forming natural energy collection-conversion-storage-utilization system. The results of this study offer a simple design route for flexible energy storage devices.

Published
2023

16. Efficient removal of fluoride ions present in industrial effluents using metal-organic frameworks of UiO-66-NH2

Author

Dario Lacalamita, Guillaume Hoyez, Chiara Mongioví, Anne Ponchel, Nadia Morin-Crini, Cyril Rousseau, Christophe Loup, Jolanta Rousseau, Marina Raschetti, Eric Monflier, Vincent Placet, Grégorio Crini, Laboratoire Chrono-environnement (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), UCCS Équipe Catalyse Supramoléculaire, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), and Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC)

Subjects
[CHIM.ORGA]Chemical Sciences/Organic chemistry, Process Chemistry and Technology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Safety, Risk, Reliability and Quality, Waste Management and Disposal, Biotechnology
Abstract

In this last decade, numerous works have been published on the use of metal organic frameworks (MOFs) for applications in adsorption field to remove contaminants from aqueous solutions. However, little is known about MOFs as adsorbents for the removal of fluoride ions from real effluents. In this work, a highly porous MOF, UiO-66-NH2, was used for the final treatment of complex discharge waters containing fluoride ions from a surface treatment plant. Batch experiments showed that MOF exhibited high adsorption capacities towards fluoride ions, leading to concentrations under current regulation values. 70–80 % of the fluoride was removed in 60 min using 100 mg of MOF in 50 mL of effluent without changing the industrial initial pH. At the same time, the treatment also completely eliminated traces of aluminium in the discharge water. All the results showed that adsorption onto a non-conventional material such as UiO-66-NH2 can be an interesting tertiary treatment step to remove more pollutant streams from multi-contaminated industrial discharge waters.

Published
2023

17. Discovery of a Peptide Nucleic Acid (PNA) aptamer for cardiac troponin I: Substituting DNA with neutral PNA maintains picomolar affinity and improves performances for electronic sensing with graphene field-effect transistors (gFET)

Author

Teresa Rodrigues, Federica Curti, Yann R. Leroux, Alexandre Barras, Quentin Pagneux, Henri Happy, Christoph Kleber, Rabah Boukherroub, Roger Hasler, Stefano Volpi, Maria Careri, Roberto Corradini, Sabine Szunerits, Wolfgang Knoll, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Austrian Institute of Technology [Vienna] (AIT), Università degli studi di Parma = University of Parma (UNIPR), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Carbon - IEMN (CARBON - IEMN), Dipartimento di Scienze Chimiche,della Vita e della Sostenibilità Ambientale, Danube Private University [Krems, Autriche] (DPU), and Financial supports from the Centre National de la Recherche Scientifique (CNRS), the University of Lille are acknowledged. This work has benefited from the equipment and framework of the COMP-HUB Initiative, funded by the ‘Departments of Excellence’ program of the Italian Ministry for University and Research (MUR, 2018–2022) for the Department of Chemistry, Life Sciences and Environmental Sustainability of the University of Parma. The TeachInParma Program is also acknowledged for sponsoring supervision and collaborative work of WK at the University of Parma premises

Subjects
Graphene-based field effect transistor, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Aptamer, Peptide nucleic acid, Cardiac troponin I, Biomedical Engineering, Pharmaceutical Science, General Materials Science, Bioengineering, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Biosensor, Biotechnology
Abstract

International audience; DNA-based aptamers are widely employed as bioreceptors, owing to their tuneable affinity and specificity towards their targets. The use of peptide nucleic acids (PNAs) has instead proven challenging for this purpose, due to the absence of selection methods for the independent discovery of suitable receptors and due to the difficult mimicry of established DNA-based ones. Despite that PNAs exceed homologous DNA or RNA in terms of complementary base pairing, they can fail to reproduce alternative modes of binding because of their different structural features. The remarkable stability and charge distribution of PNAs could be beneficial to produce sensing bioreceptors, especially in the development of electronic devices such as field-effect transistor-based (FET) biosensors. We hereby report for the first time a high-affinity PNA aptamer for cardiac Troponin I (cTnI), a biomarker of acute myocardial infarction, able to interact with this specific protein in the picomolar range. The PNA aptamer was immobilized onto a graphene-based FET (gFET) transducer, and its ability in the direct detection of cTnI was compared with that of a DNA-based one of the same sequence. Similar dissociation constants were recorded for both receptors in 0.01 × PBS, as well as comparable detection limits of 6.0 ± 1.0 pg mL-1 (PNA aptamer) and 3.3 ± 0.7 pg mL-1 (DNA aptamer). Apart from the non-trivial demonstration that a PNA can behave as an aptamer, the tested receptor proved to be more consistent upon working in more complex biological matrices.

Published
2023

18. Deep learning-based hard spatial attention for driver in-vehicle action monitoring

Author

Imen Jegham, Ihsen Alouani, Anouar Ben Khalifa, Mohamed Ali Mahjoub, Laboratory of Advanced Technology and Intelligent Systems (LATIS), Ecole Nationale d'Ingénieurs de Sousse (ENISo), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), COMmunications NUMériques - IEMN (COMNUM - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Queen's University [Belfast] (QUB), and no information

Subjects
In-vehicle action monitoring, [PHYS]Physics [physics], Recognition, [SPI]Engineering Sciences [physics], Action, Artificial Intelligence, General Engineering, Hybrid network, Driver, Deep learning, Hard attention, Computer Science Applications
Abstract

International audience; Distracted driving is one of the main causes of deaths and injuries in the world. Monitoring driver behaviors through Driver Action Recognition (DAR) contributes significantly to building safer transportation systems. However, in naturalistic driving settings, this task is complex and challenging because of numerous difficulties, such as high illumination variation and cluttered and dynamic background. In this paper, we introduce a novel hard attention network that highlights the most pertinent driving-scene information while filtering out irrelevant data. Specifically, only local discriminative salient regions are exploited through a hard attention mechanism. The experimental results indicate that our approach significantly enhances DAR performance. We evaluated our network on three diverse state-of-the-art datasets recorded in real-world conditions: it achieves up to 95.83% in terms of safe driving recognition and up to 99.07% in terms of distraction detection. The proposed approach outperforms the soft attention-based DAR not only in detection and recognition performance but also in computation complexity by 38.71% less runtime. For reproducible research, the code is available at https://github.com/JEGHAMI/HSA

Published
2023

19. Comparison of dynamic models for a DC railway electrical network including an AC/DC bi-directional power station

Author

N’guessan Kouassi, Christophe Saudemont, Tony Letrouve, Bruno Francois, Nicolas Navarro, Khaled Almaksour, Youssef Krim, Benoit Robyns, Lionel Taunay, Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 (L2EP), Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Université Félix Houphouët-Boigny (UFHB), École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL), Biogéosciences [UMR 6282] (BGS), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Centrale Lille, L2EP - Équipe Réseaux, Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, Département recherche et développements (R&D - SNCF), and SNCF

Subjects
Numerical Analysis, General Computer Science, Power station, Computer science, Applied Mathematics, [SPI.NRJ]Engineering Sciences [physics]/Electric power, Automotive engineering, Theoretical Computer Science, law.invention, Regenerative brake, Real-time simulation, law, Modeling and Simulation, Electrical network, Inverter, Train, Electric power, ComputingMilieux_MISCELLANEOUS, Efficient energy use
Abstract

To face environmental issues, SNCF, the French railway, has chosen to improve the energy efficiency of its electrical power system by investigating solutions for regenerative braking. With the contribution of Railenium, a research and test center in railway activities, they aim to recover the braking energy by setting up a reversible inverter in the DC substation ”Massena”. The issue is to test, implement and compare various control solutions to increase the energy efficiency with minimum impacts on the railway operation. In this paper, a simulation model for studying a reversible power substation is addressed by considering AC and DC equivalent electrical sources. The proposed model provides a reliable tool for analyzing the behavior of the railway electrical network during specially braking mode. In order to validate this model, its simulation results are compared with the ones obtained from Esmeralda, the SNCF professional software. A first configuration is led without the inverter and gives certified Esmeralda results and validates the proposed model despite some gaps in powers and voltages due to differences in input data and models. A second comparison with inverter is presented to highlight the main difference between the proposed model and Esmeralda. In addition, laboratory experimental activities are put forward to investigate the proposed model by using power-hardware-in-the-loop simulations. Finally, a simulation test under MATLAB software with fifty train’s traffic is presented to estimate the energy saving thanks to the installed inverter. For this latter case study, the system sent back to the national AC grid around 6.9% of the total energy consumed by all trains.

Published
2021

20. Consumers’ sensitivities and preferences modelling and integration in a decentralised two levels energy supervisor

Author

Sabine Kazmierczak, Benoit Durillon, Christophe Saudemont, Arnaud Davigny, Florentin Salomez, Hervé Barry, Benoit Robyns, L2EP - Équipe Électronique de puissance (EP), Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 (L2EP), Centrale Lille-Haute Etude d'Ingénieurs-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Centrale Lille-Haute Etude d'Ingénieurs-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)

Subjects
General Computer Science, Computer science, 010103 numerical & computational mathematics, 02 engineering and technology, computer.software_genre, 7. Clean energy, 01 natural sciences, Theoretical Computer Science, News aggregator, Demand response, [SPI]Engineering Sciences [physics], 0202 electrical engineering, electronic engineering, information engineering, 0101 mathematics, ComputingMilieux_MISCELLANEOUS, Numerical Analysis, Supervisor, business.industry, Applied Mathematics, [SPI.NRJ]Engineering Sciences [physics]/Electric power, Environmental economics, Grid, Electrical grid, Renewable energy, Energy management system, 13. Climate action, Modeling and Simulation, 020201 artificial intelligence & image processing, Electricity, business, computer
Abstract

To address the new challenges arising from the higher penetration of renewable energy in electrical grid, Demand Response (DR) aims to involve the residential consumers in the grid equilibrium. Ensuring benefits for both utility and users requires the consumers sensitivities to be understood and then included in the Energy Management System (EMS). For this purpose, the cost is the predominant and most often only factor taken into account in the literature, although in the residential sector other concerns influencing electricity consumption behaviour have been observed. This paper presents a two levels EMS applied to a neighbourhood of consumers mathematically modelled at the level of their appliances and incorporating 5 consumers profiles along three sensitivities: cost, environment and appliances shifting comfort. The first level is a day ahead supervision based on a multi-agent optimisation lead by a central aggregator but performed locally by the household using Dynamic Programming (DP), thus ensuring privacy protection for the stakeholders. The second level is a real time supervision using the same decentralised structure and based on fuzzy logic. Both levels are evaluated in this paper, with a focus on the balance between grid and consumers objectives.

Published
2021

21. Asymmetric micro-supercapacitors based on electrodeposited Ruo2 and sputtered VN films

Author

Christophe Lethien, Thierry Brousse, Kevin Robert, Bouchra Asbani, Pascal Roussel, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Réseau sur le stockage électrochimique de l'énergie (RS2E), Université de Nantes (UN)-Aix Marseille Université (AMU)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Collège de France (CdF (institution))-Université de Picardie Jules Verne (UPJV)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), Circuits Systèmes Applications des Micro-ondes - IEMN (CSAM - IEMN ), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), This research benefitted from the financial support of the ANR within the DENSSCAPIO project (ANR-17-CE05–0015–02). The authors would also like to thank the ANR STORE-EX and the RS2E for their financial support. The RENATECH network receives our utmost gratitude. Chevreul Institute (CNRS FR 2638), Ministère de l’Enseignement Supérieur et de la Recherche, Région Hauts de France and FEDER are acknowledged for supporting and funding XRD facilities., RS2E, Renatech Network, CMNF, ANR-17-CE05-0015,DENSSCAPIO,Supercondensateurs nanostructurés tout-solides pour stockage d'énergie plus dense et plus sûr(2017), ANR-10-LABX-0076,STORE-EX,Laboratory of excellency for electrochemical energy storage(2010), Université de Picardie Jules Verne (UPJV)-Institut de Chimie du CNRS (INC)-Aix Marseille Université (AMU)-Université de Pau et des Pays de l'Adour (UPPA)-Université de Nantes (UN)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Collège de France (CdF (institution))-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), CNRS, Centrale Lille, ENSCL, ISEN, Institut Catholique Lille, Univ. Artois, Univ. Valenciennes, Université de Lille, Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520, and Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Subjects
Materials science, Vanadium nitride, Energy Engineering and Power Technology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, 7. Clean energy, Capacitance, Ruthenium oxide, vanadium nitride, chemistry.chemical_compound, asymmetric micro-supercapacitors, Sputtering, General Materials Science, Thin film, Electrochemical potential, Power density, Supercapacitor, Renewable Energy, Sustainability and the Environment, business.industry, [SPI.NRJ]Engineering Sciences [physics]/Electric power, hydrous ruthenium oxide, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, thin films, chemistry, electrodeposition, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Optoelectronics, sputtering, 0210 nano-technology, business
Abstract

International audience; Research on micro-supercapacitors remains one of the most important activities in the area of electrochemical energy storage for powering smart and miniaturized electronic devices. Here we design an asymmetric micro-supercapacitor (A-MSC) combining sputtered vanadium nitride film (VN) and electrodeposited hydrous ruthenium oxide (hRuO2) film. Taking advantage of their complementary electrochemical potential windows in 1 M KOH electrolyte, the A-MSC achieves a cell voltage up to 1.15 V, associated to high specific capacitance values for the device (≈ 100 mF cm−2). The energy density of this asymmetric VN / hRuO2 micro-supercapacitor reaches 20 µWh cm−2 at a power density of 3 mW cm−2. Taking benefit from the asymmetric configuration, a 5-fold enhancement factor in energy density is demonstrated for the VN / hRuO2 asymmetric micro-supercapacitor as compared to symmetric VN / VN and hRuO2 / hRuO2 microdevices.

Published
2021

22. Automatically weighted binary multi-view clustering via deep initialization (AW-BMVC)

Author

Khamis Houfar, Djamel Samai, Fadi Dornaika, Azeddine Benlamoudi, Khaled Bensid, Abdelmalik Taleb-Ahmed, Université Kasdi Merbah Ouargla, Universitat Autònoma de Barcelona (UAB), Ikerbasque - Basque Foundation for Science, University of the Basque Country/Euskal Herriko Unibertsitatea (UPV/EHU), Center for Machine Vision Research (CMV), University of Oulu, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), COMmunications NUMériques - IEMN (COMNUM - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université Polytechnique Hauts-de-France (UPHF), The authors gratefully acknowledge the Directorate General for Scientific Research and Technological Development (DGRSDT) of Algeria for the financial support to this work. This work is part of the grant PID2021-126701OB-I00 funded by MCIN/AEI/10.13039/501100011033 and by ERDF A way of making Europe., Universitat Autònoma de Barcelona [UAB], University of the Basque Country/Euskal Herriko Unibertsitatea [UPV/EHU], Center for Machine Vision Research [CMV], Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN], COMmunications NUMériques - IEMN [COMNUM - IEMN], and Université Polytechnique Hauts-de-France [UPHF]

Subjects
[SPI]Engineering Sciences [physics], Discrete representation, Artificial Intelligence, Multi-view clustering, Anchors, Signal Processing, BD-FFT, Large scale, Computer Vision and Pattern Recognition, Software
Abstract

International audience; Clustering is inherently a process of exploratory data analysis. It has attracted more attention recently because much real-world data consists of multiple representations or views. However, it becomes increasingly problematic when dealing with large and heterogeneous data. It is worth noting that several approaches have been developed to increase computational efficiency, although most of them have some drawbacks: (1) Most existing techniques consider equal or static weights to quantify importance across different views and samples, so common and complementary features cannot be used. (2) The clustering task is performed by arbitrary initialization without caring about the rich structure of the joint discrete representation, and thus poorly executed. In this paper, we propose a novel approach called “Auto-Weighted Binary Multi-View Clustering Via Deep Initialization” for large-scale multi-view clustering based on two main scenarios. First, we consider the distinction between different views based on the importance of samples, and therefore apply a dynamic learning strategy for the automatic weighting of views and samples. Second, in the context of initializing binary clustering, we develop a new CNN feature and use a low-dimensional binary embedding by exploiting the efficient capabilities of Fourier mapping. Moreover, our approach simultaneously learns a joint discrete representation and performs direct clustering using a constrained binary matrix factorization; the optimization problem is perfectly solved in a unified learning model. Experimental results conducted on several challenging datasets demonstrate the effectiveness and superiority of the proposed approach over state-of-the-art methods in terms of accuracy, normalized mutual information, and purity.

Published
2023

23. Electrolyte ohmic heating during electrodeposition: The role of coupled kinetic-transport phenomena that lead to morphological and microstructural changes

Author

Pınar Eribol, Sarathy K. Gopalakrishnan, S.V. Diwakar, Abdelkrim Talbi, Ranga Narayanan, Farzam Zoueshtiagh, Kirk J. Ziegler, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), and This work was partially supported by grants from the National Science Foundation, United States NSF-DMR-2004527, the University of Florida Space Research Initiative, United States, and the French Space Agency (CNES). PE acknowledges the financial support of The Scientific and Technological Research Council of Turkey (TUBITAK) 2219 - International Postdoctoral Research Fellowship. SKG acknowledges the travel support from Research Abroad for Doctoral Students (RAD) award, United States, Botic Family Scholars Professional Pathways Program award, France, Graduate Student Council travel award, United States, and University of Florida Office of Research travel fund, United States. RN acknowledges financial support from the William P. and Tracy Cirioli Professorship, United States. KJZ acknowledges financial support from the Dow Chemical Company Foundation Professorship, United States, the Charles A. Stokes Professorship, United States, and a Visiting Professorship from Université de Lille/IEMN, France .

Subjects
Morphology, Concentration, [SPI]Engineering Sciences [physics], Electrodeposition, General Chemical Engineering, Electrochemistry, Instability, Copper sulfate, Convection, Copper
Abstract

International audience; Understanding the morphological changes to the electrodes during electrochemical processes is important to many fields. These morphological changes often lead to dendrite formation and significant heat generation that can be detrimental to the process, especially the performance and lifetime of batteries. In situ infrared thermometry and microscopy are used to study the evolution of temperature profiles during the microscale electrodeposition of copper from copper sulfate. Under certain conditions, the growth front of the deposit receded and the fastest growing dendrites would suddenly stop growing. Analysis of physicochemical, temperature, and current changes show that many dynamic phenomena are correlated and associated with localized pH changes that change the chemistry of electrodeposition and potential drops occurring across the electrodes that alter the transport around dendrites.

Published
2023

24. Relation between thermal quenching of photoluminescence and negative capacitance on InGaN/GaN multiple quantum wells in p-i-n structure

Author

Orhan Özdemir, Hanife Baş, Neslihan Ayarcı Kuruoğlu, Kutsal Bozkurt, Mustafa Aydın, Fahrettin Sarcan, Ayşe Erol, Bandar Alshehri, Karim Dogheche, Elhadj Dogheche, Yildiz Technical University (YTU), Istanbul University, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Optoélectronique - IEMN (OPTO - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université Polytechnique Hauts-de-France (UPHF), and This work was supported by a Research Fund of the Yildiz Technical University under contract number FBA-2022-4983. We acknowledge the Support from the Saudi Cultural Attaché, Bureau Culturel Saoudien, Ambassade d'Arabie Saoudite à Paris, France.

Subjects
[PHYS]Physics [physics], [SPI]Engineering Sciences [physics], Biophysics, General Chemistry, Condensed Matter Physics, Biochemistry, Atomic and Molecular Physics, and Optics
Abstract

International audience; Temperature-dependent photoluminescence (PL) and surface photovoltage (SPV) measurements were carried out to detect radiative and non-radiative transitions on InGaN/GaN quantum well (QW) blue light-emitting device (LED). The emissions, peaking at 3.03 eV and 2.89 eV, were present in both PL and SPV spectrum and shifted with the temperature in a decrease-increase-decrease manner; the so-called S-shaped behavior between 30-150 K. Remarkably, the shift continued with an increase in energy (blue shift) and finally saturated for a temperature above 150 K. The first variation below 150 K was explained by the composition fluctuation of In atom in the InGaN MQW layer. In contrast, the second significant shift in peak energy was caused to the localization effect, around 60 meV. The degree of localized (σ) value agreed with the activation energy of thermal quenching of PL intensity. A strong localization effect was also attributed to the sub-bandgap trap level in the quantum well and originated negative capacitance in admittance spectroscopy measurement.

Published
2023

25. Cerium modified birnessite-like MnO2 for low temperature oxidation of formaldehyde: Effect of calcination temperature

Author

Abdallah, Grece, Giraudon, Jean-Marc, Nuns, Nicolas, Addad, Ahmed, Morent, R., de Geyter, N., Lamonier, Jean-Francois, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Universiteit Gent = Ghent University (UGENT)

Subjects
HCHO oxidation, General Physics and Astronomy, Calcination, [CHIM.CATA]Chemical Sciences/Catalysis, Surfaces and Interfaces, General Chemistry, ToF-SIMS, Condensed Matter Physics, Cerium modified birnessite, Surfaces, Coatings and Films
Abstract

International audience; Cerium modified birnessite-like MnO2 were synthesized (CexMn; x = 0.01; 0.1) from a simple and inexpensive redox method involving the reduction of potassium permanganate by sodium lactate in the presence of Ce(NO3)3 at ambient temperature. The as-synthesized samples were calcined at different temperatures (Tc: 200, 300 and 400 °C) to be tested in HCHO total oxidation in dry air at low temperature. The Ce0.01Mn catalyst calcined at 400 °C showed the best catalytic activity in HCHO oxidation with a T50 (temperature at which 50 % of HCHO was converted into CO2) of 50 °C and was found to be air and moisture stable (up to 75 %RH) upon time. The beneficial effects of a calcination step at 400 °C allowed to get enhanced asymmetric Ce-O-Mn surface interactions along with highly dispersed Ce4+/3+ related species and enhanced TCMn3+ (TC: triple corner) amounts which contributed to a great extent for its high activity in HCHO oxidation.

Published
2023

26. Do not let electrode fouling be the enemy of bioanalysis

Author

Szunerits, Sabine, Pagneux, Quentin, M'Barek, Youssef Ben, Vassal, Simon, Boukherroub, Rabah, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Financial support from the Centre National de la Recherche Scientifique (CNRS), the University of Lille and the Hauts-de-France region are acknowledged. Support by the ANR PADISC (ANR-20-CE19-0021) and EuroNanoMed III (Gskin) are acknowledged in addition., ANR-20-CE19-0021,PADISC,Pansements Actifs intégrant des Capteurs Électroniques embarqués graphène pour la Détection In-Situ De l'Infection et le Suivi de la Cicatrisation(2020), and ANR-21-ENM3-0002,GSkin,Growth factors-rich EVs-functionalized graphene-on-hydrogel based skin bioactive regeneration scaffolds(2021)

Subjects
[PHYS]Physics [physics], [SPI]Engineering Sciences [physics], Electrochemistry, Biophysics, General Medicine, Physical and Theoretical Chemistry
Abstract

International audience; Electrochemical biosensors are one of the best choices for the sensing of biomarkers due to their high performance, low cost, miniaturization, and wide applicability. However, like for any sensing process, electrode fouling affects severely the analytical performance of the sensor, such as sensitivity, detection limit, reproducibility, and overall reliability. Fouling arises from nonspecific adsorption of different components present in the sensing medium and in particular in complex biofluids such as full blood. The complex composition of blood where biomarkers are present at extremely low concentrations compared to the rest of the fluid composition makes electrochemical biosensing challenging. Direct biomarker analysis within full blood samples remains however central for the future development in electrochemical-based diagnostics. Herein, we aim to provide short discussion of past and more recent strategies and concepts employed to diminish background noise due to surface fouling and overcome current hurdles for the implementation and commercialisation of electrochemical-based biosensors for medical diagnostics of protein biomarkers in a point of care format.

Published
2023

27. Performance simulation of an InGaSb/GaSb based quantum well structure for laser diode applications

Author

Chenini, Lynda, Aissat, A., Halbwax, Mathieu, Vilcot, Jean-Pierre, Université Saâd Dahlab Blida 1 (UB1), Faculté De Technologie Blida1, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Optoélectronique - IEMN (OPTO - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and no information

Subjects
[PHYS]Physics [physics], Detection, [SPI]Engineering Sciences [physics], Optoelectronic, Lasers, General Physics and Astronomy, Semiconductor, Nanostructures
Abstract

International audience; AbstractThe present study reports the impact of structural parameters on optoelectronic properties of InGasb/GaSb based quantum well structures (Qws). The laser diodes are designed to operate at 2.3 μm at 300 K. Numerical calculations of the emission wavelength, optical and modal gain of TE mode in InGaSb/GaSb laser diode structure have been carried out for various well material compositions, well thickness, number of quantum wells and temperature. The optical confinement factor and threshold current density are also simulated and reported. The calculations were performed using the 8-bands k.p model. For an injected carrier concentration of 1.56 × 1018 cm−3 at 300 K, peak gain value of the order of 1400 cm−1 is reached and a modal gain of 94 cm−1 can be obtained. A threshold current density around 3 kA/cm2, is expected to be obtained through optical losses of about 50 cm−1. The results show that InGaSb/GaSb quantum wells are appropriate for mid-infrared lasers operating at 300 K.

Published
2023

28. 160P Non-invasive analysis of VOCs in exhaled air can distinguish healthy controls from lung cancer patients and may improve the effectiveness of lung cancer screening

Author

Hulo, S., Jacques, J., Sihrener, F., Wasielewski, E., Jourdan, Laetitia, Poslednik, G., Poulet, C., Turlotte, A., Gey, T., Douadi, Y., Thiberville, L., Dewolf, M., Lecerf, J-M., Estevié, I., Ricard, V., Martin, J., Romain, A-C., Locoge, N., Matran, R., Scherpereel, A., Institut Coeur Poumon [CHU Lille], Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Operational Research, Knowledge And Data (ORKAD), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and European Project: 1.1.297

Subjects
Pulmonary and Respiratory Medicine, Oncology, [SDV]Life Sciences [q-bio], [CHIM]Chemical Sciences, [INFO]Computer Science [cs]
Published
2023

29. High Al-content AlGaN channel high electron mobility transistors on silicon substrate

Author

J. Mehta, I. Abid, J. Bassaler, J. Pernot, P. Ferrandis, M. Nemoz, Y. Cordier, S. Rennesson, S. Tamariz, F. Semond, F. Medjdoub, WIde baNd gap materials and Devices - IEMN (WIND - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Semi-conducteurs à large bande interdite (NEEL - SC2G), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Université de Toulon (UTLN), Centre de recherche sur l'hétéroepitaxie et ses applications (CRHEA), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), EasyGaN, partially supported by the French RENATECH network, Renatech Network, CMNF, ANR-11-LABX-0014,GANEX,Réseau national sur GaN(2011), ANR-22-CE05-0028,ACTION,Nouveau transistors à canaux AlGaN pour les applications à haute tension(2022), WIde baNd gap materials and Devices - IEMN [WIND - IEMN], Semi-conducteurs à large bande interdite [NEEL - SC2G], Université de Toulon [UTLN], and Centre de recherche sur l'hétéroepitaxie et ses applications [CRHEA]

Subjects
[SPI]Engineering Sciences [physics], AlGaN-on-Si AlGaN channel UWBG HEMT
Abstract

International audience; The rapidly increasing power demand, downsizing of power electronics and material specific limitation of silicon has led to development of AlGaN/GaN heterostructures. Commercial GaN power devices are best available for radio frequency (RF) and high voltage switching applications. Emerging Al x Ga 1-x N channel based heterostructures are promising to enhance the limits of next generation high voltage GaN power switching devices. In this work, we report on the study of electrical performance of AlGaN channel HEMTs-on-Silicon using various Al content. The fabricated devices exhibited outstanding buffer breakdown electric field above 2.5 MV/cm considering the submicron thin heterostructures grown on silicon substrate. Furthermore, we also experimentally demonstrate high temperature operation of fabricated AlGaN channel HEMTs.

Published
2023

30. Comparison of through-space homonuclear correlations between quadrupolar nuclei in solids

Author

Gómez, Jennifer S., Trebosc, Julien, Tuan Duong, Nghia, Pourpoint, Frederique, Lafon, Olivier, Amoureux, Jean-Paul, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), UCCS Équipe Catalyse Supramoléculaire, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), RIKEN Center for Sustainable Resource Science [Yokohama] (RIKEN CSRS), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), and UCCS Équipe RMN et matériaux inorganiques

Subjects
Nuclear and High Energy Physics, Double-quantum coherences, Biophysics, Homonuclear correlation, Quadrupolar nuclei, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.INOR]Chemical Sciences/Inorganic chemistry, Condensed Matter Physics, Single-quantum coherences, Spatial proximity, Biochemistry
Abstract

International audience; Various two-dimensional (2D) homonuclear correlation experiments have been proposed to observe proximities between identical half-integer spin quadrupolar nuclei in solids. These experiments select either the single- or double-quantum coherences during the indirect evolution period, t1. We compare here the efficiency and the robustness of the 2D double-quantum to single-quantum (DQ-SQ) and SQ-SQ homonuclear correlations for two half-integer spin quadrupolar isotopes subject to small chemical shift anisotropy (CSA): 11B with a nuclear spin I = 3/2 and 27Al with I = 5/2. Such a comparison is performed using experiments on two model samples: Li2B4O7 for 11B and AlPO4-14 for 27Al. For both isotopes, the DQ-SQ homonuclear correlations are recommended since they allow probing the proximities between nuclei with close or identical frequencies. In the case of small or moderate isotropic chemical shift differences (e.g. 11B) the [SR221] or [BR221] bracketed DQ-SQ recoupling schemes are recommended; whereas it is the BR221 un-bracketed one otherwise (e.g. 27Al).

Published
2023

31. Finding the root graph through minimum edge deletion

Author

Alfredo Marín, Mercedes Pelegrín, Martine Labbé, Integrated Optimization with Complex Structure (INOCS), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Université libre de Bruxelles (ULB)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Department of Statistics and Operational Research, Universidad de Murcia, Laboratoire d'informatique de l'École polytechnique [Palaiseau] (LIX), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and The authors acknowledge that research reported here was supported by Spanish Ministerio de Economía y Competitividad, project MTM2015-65915-R, and Ministerio de Educación , Cultura y Deporte PhD grant FPU15/05883. The authors sincerely thank Prof. Bjarni Vilhjálmur Halldórsson for sharing some of the benchmarks used in the computational study.

Subjects
Information Systems and Management, General Computer Science, Computer science, 0211 other engineering and technologies, Root (chord), 02 engineering and technology, Management Science and Operations Research, Edge (geometry), Industrial and Manufacturing Engineering, law.invention, Combinatorics, Informatique de gestion, Discrete Optimization, law, Discrete optimization, Informatique mathématique, 0502 economics and business, Line graph, Théorie de la décision et des choix collectifs, 050210 logistics & transportation, 021103 operations research, 05 social sciences, Haplotyping, [INFO.INFO-RO]Computer Science [cs]/Operations Research [cs.RO], Graph, Line Graphs, Modeling and Simulation, Graph (abstract data type), Node (circuits), Recherche opérationnelle, Line graphs, MathematicsofComputing_DISCRETEMATHEMATICS
Abstract

The line graph of a graph G has one node per each edge of G, two of them being adjacent only when the corresponding edges have a node of G in common. In this work, we consider the problem of finding the minimum number of edges to delete so that the resulting graph is a line graph, which presents an interesting application in haplotyping of diploid organisms. We propose an Integer Linear Programming formulation for this problem. We compare our approach with the only other existing formulation for the problem and explore the possibility of combining both of them. Finally, we present a computational study to compare the different approaches proposed., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2021

32. Acoustic Tamm states in slender tubes

Author

Madiha Amrani, Soufyane Khattou, E. H. El Boudouti, A. Mouadili, Bahram Djafari-Rouhani, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Physique - IEMN (PHYSIQUE - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Centre National pour la Recherche Scientifique et Technique, CNRST, Hammouti B.Eddaoudi M.Touzani R., Université catholique de Lille (UCL)-Université catholique de Lille (UCL), and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)

Subjects
Surface (mathematics), Physics, Comb-like structure, 02 engineering and technology, Acoustic wave, Type (model theory), 021001 nanoscience & nanotechnology, 01 natural sciences, Molecular physics, Crystal, Maxima and minima, [SPI]Engineering Sciences [physics], Transmission (telecommunications), Band gap, 0103 physical sciences, Transmission, Waveguide (acoustics), Tube (container), 010306 general physics, 0210 nano-technology, Acoustic Tamm states, Surface modes
Abstract

International audience; We present an analytical and numerical study of the possibility of existence of surface localized modes, the so-called Tamm states, in a one-dimensional (1D) comb-like phononic crystal (PnC). The structure is made out of periodic array of stubs of lengths d2grafted along a waveguide and separated from each other by a tube of length d1. We show the existence of surface modes for the semi-infinite structure. In particular, when one considers two complementary semi-infinite systems obtained by cutting the infinite one into two parts, we obtain one surface mode per gap induced by the surface of the two complementary systems. Furthermore, we demonstrate that these surface modes can be detected from the maxima and minima of the transmission spectrum, when the finite structure is grafted vertically along a homogeneous acoustic waveguide. That means that one can observe experimentally this type of modes for acoustic waves in slender tubes. These results may find many practical applications in noise control and highly sensitive PnC sensors. © 2021 Elsevier Ltd. All rights reserved.

Published
2021

33. Influence of process variables on foaming ability of surfactants: Experimental study and dimensional analysis

Author

Alla Nesterenko, Elisabeth van-Hecke, Rémy Bois, Isabelle Pezron, Guillaume Delaplace, Océane Adriao, Transformation Intégrée de la Matière Renouvelable (TIMR), Université de Technologie de Compiègne (UTC), Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), and Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
Materials science, General Chemical Engineering, Flow (psychology), Mixing (process engineering), 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Reynolds number, Agitator, Physics::Fluid Dynamics, symbols.namesake, Surfactant, [SDV.IDA]Life Sciences [q-bio]/Food engineering, Mechanical stirring, Experimental work, Rotational speed, General Chemistry, Mechanics, 021001 nanoscience & nanotechnology, Dimensional analysis, 0104 chemical sciences, Process, Scientific method, symbols, 0210 nano-technology, Foaming, Dimensionless quantity
Abstract

International audience; By applying the dimensional analysis approach to a lab-scale stirred tank process, the influence of process parameters on the foamability of three model surfactants: SLES, Tween 20 and Brij L23 is investigated and modelled. For validation of process law, the theoretical approach is complemented with an experimental work varying process parameters such as agitator rotational speed rate (N), mixing time (tm) and bottom clearance (Cb). The foam rate of expansion of surfactant solutions is correlated with success to two dimensionless numbers: the Reynolds number and the mixing time number. Reynolds number is observed as mainly governing the amount of formed foam. A clear difference between the intermediate flow regime (Re < 105) and the turbulent one (Re > 105) is observed leading to a different process law for each regime. Master curves are finally drawn and can be used for helping to predict final foam volumes in the studied experimental domain according to both dimensionless numbers.

Published
2021

34. Pressure effects on morphology of isotropic char layer, shrinkage, cracking and reduced heat transfer of wooden material

Author

Kaiyuan Li, Serge Bourbigot, Yanyan Zou, Jie Ji, Xianfeng Chen, Université de Lille, CNRS, INRA, ENSCL, Wuhan University [China], BRANZ [New Zealand], Unité Matériaux et Transformations - UMR 8207 [UMET], University of Science and Technology of China [Hefei] [USTC], Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), University of Science and Technology of China [Hefei] (USTC), European Project: 670747,H2020,ERC-2014-ADG,FireBar-Concept(2016), and Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
Materials science, 020209 energy, General Chemical Engineering, 02 engineering and technology, Char, Thermal conductivity, Heat transfer, Pressure, 0202 electrical engineering, electronic engineering, information engineering, Physical and Theoretical Chemistry, Composite material, Shrinkage, Wood, Pyrolysis, Mechanical Engineering, Internal pressure, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Cracking, [CHIM.POLY]Chemical Sciences/Polymers, 0210 nano-technology, Ambient pressure
Abstract

International audience; Using a compartment with adjustable oxygen concentration and internal pressure, the shrinkage and cracking of isotropic char layer during pyrolysis were studied by pyrolyzing the medium density fibreboard (MDF) in inert atmosphere with different ambient pressures. The experimental results have shown that the ambient pressure has insignificant effect on shrinkage although some trends have been identified. Therefore, the reduction of tensile strength of material dominates the char cracking under low pressures, leading to noticeableincrease in the number of char fissures. The char shrinkage could expose the raw material beneath the char layer and enhance the radiative heat transfer at the sample surface (by fissure width instead of number), which is modeled using a modified thermal conductivity as the typical simplification. It is found that the mass loss rate at the early pyrolysis stage increases up to 20% with increasing width of char fissures. However, the external radiation can only affect a limited depth in the near surface zone which is found less than 3 mm in the current experiments. The thermal conductivity under near regular pressure could be over 2 times higher than its value under low pressure (30 kPa) and with which the differences in the first peaks of mass loss rate under different pressures can be well predicted.

Published
2021

35. A novel multi-view pedestrian detection database for collaborative Intelligent Transportation Systems

Author

Mohamed Ali Mahjoub, Atika Rivenq, Ihsen Alouani, Anouar Ben Khalifa, Laboratory of Advanced Technology and Intelligent Systems (LATIS), Ecole Nationale d'Ingénieurs de Sousse (ENISo), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), COMmunications NUMériques - IEMN (COMNUM - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Université de Sousse, Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), and Institut National des Sciences Appliquées (INSA)

Subjects
Scheme (programming language), Collaborative intelligence, Computer Networks and Communications, Computer science, Pedestrian detection, 02 engineering and technology, computer.software_genre, Task (project management), [SPI]Engineering Sciences [physics], 11. Sustainability, 0202 electrical engineering, electronic engineering, information engineering, Intelligent transportation system, ComputingMilieux_MISCELLANEOUS, computer.programming_language, Environment perception, Monocular, Database, 020206 networking & telecommunications, Multi-view, Hardware and Architecture, Infrastructure to vehicle, 020201 artificial intelligence & image processing, computer, CNN, Software
Abstract

International audience; Recent advances in machine-learning, especially in deep neural networks have significantly accelerated the development and deployment of transport-oriented intelligent designs with increasingly high efficiency. While these technologies are exceptionally promising toward revolutionizing our current mobility and reducing the number of road accidents, the way to safe Intelligent Transportation Systems (ITS) remains long. Since pedestrians are the most vulnerable road users, designing accurate pedestrian detection methods is a priority task. However, traditional monocular pedestrian detection methods are limited, especially in occlusion handling. Hence, a collaborative perception scheme in which vehicles no longer restrict their input data to their immediate embedded sensors and rather exploit data from remote sensors is necessary to achieve a more comprehensive environment perception. In this work, we propose a novel public dataset: Infrastructure to Vehicle Multi-View Pedestrian Detection Database (I2V-MVPD) that combines synchronized images from both a mobile camera embedded in a car and a static camera in the road infrastructure. We also propose a new multi-view pedestrian detection framework based on collaborative intelligence between vehicles and infrastructure. Our results show a significant improvement in detection performance over monocular detection.

Published
2020

36. VOCs catalytic removal over hierarchical porous zeolite NaY supporting Pt or Pd nanoparticles

Author

Rebecca El Khawaja, Shilpa Sonar, Tarek Barakat, Nicolas Heymans, Bao-Lian Su, Axel Löfberg, Jean-François Lamonier, Jean-Marc Giraudon, Guy De Weireld, Christophe Poupin, Renaud Cousin, Stéphane Siffert, Université de Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, Unité de Chimie Environnementale et Interactions sur le Vivant [UCEIV], Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Université de Namur [Namur] [UNamur], Laboratoire de Thermodynamique Physique-Mathématique [LTPM], Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181, University of Mons [Belgium] [UMONS], Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d'Opale (ULCO), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Namur [Namur] (UNamur), Laboratoire de Thermodynamique Physique-Mathématique (LTPM), Faculté polytechnique de Mons, Université de Mons (UMons)-Université de Mons (UMons), and University of Mons [Belgium] (UMONS)

Subjects
Pt and Pd supported zeolites, Hierarchical porous zeolite, VOCs oxidation, [SDE.IE]Environmental Sciences/Environmental Engineering, General Chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, Catalysis
Abstract

International audience; The present work reports the impregnation of palladium (Pd) or platinum (Pt) on hierarchical porous zeolite catalysts for Volatile Organic Compounds (VOCs) oxidation. The hierarchical porous zeolite (NaYmod) was synthesized via a top-down approach to incorporate mesoporosity into the microporous zeolite NaY. This process was achieved through a three steps synthesis: dealumination, desilication and alkaline treatment. 0.5 wt% of Pd and Pt precursors were then added to NaY and NaYmod supports by wet impregnation in order to elaborate efficient catalysts for the total oxidation of two types of VOCs, ethanol and toluene, which are probe molecules for oxygenated VOCs and BTEX compounds respectively. The supported and unsupported samples were characterized by X-Ray Diffraction (XRD), N2-physisorption, Transmission Electron Microscopy (TEM), and X-Ray Photoelectron Spectroscopy (XPS). The modified mesostructured support ensures a better dispersion of the active phases and led to a partial presence of highly reactive Pt(II) species in the case of platinum-based samples. Whatever the oxidation reaction, these latter demonstrate higher conversions compared to palladium-based ones. The presence of Pt(II) species provided a high catalytic performance, with a total degradation of both VOC probe molecules at temperatures lower than 170 °C. Such temperatures have not been recorded before for NaY supported materials.; Le présent travail rapporte l'imprégnation de palladium (Pd) ou de platine (Pt) sur des catalyseurs zéolitiques poreux hiérarchiques pour l'oxydation des composés organiques volatils (COV). La zéolithe poreuse hiérarchique (NaYmod) a été synthétisée via une approche descendante pour incorporer la mésoporosité dans la zéolithe microporeuse NaY. Ce processus a été réalisé par une synthèse en trois étapes : désalumination, désilication et traitement alcalin. 0,5 % en poids de précurseurs de Pd et Pt ont ensuite été ajoutés aux supports NaY et NaYmod par imprégnation humide afin d'élaborer des catalyseurs efficaces pour l'oxydation totale de deux types de COV, l'éthanol et le toluène, qui sont des molécules sondes pour les COV oxygénés et les composés BTEX respectivement. Les échantillons supportés et non supportés ont été caractérisés par diffraction des rayons X (XRD), physisorption du N2, microscopie électronique à transmission (TEM) et spectroscopie photoélectronique à rayons X (XPS). Le support mésostructuré modifié assure une meilleure dispersion des phases actives et a conduit à une présence partielle d'espèces Pt(II) hautement réactives dans le cas des échantillons à base de platine. Quelle que soit la réaction d'oxydation, ces derniers présentent des conversions plus élevées par rapport aux échantillons à base de palladium. La présence d'espèces de Pt(II) a fourni une performance catalytique élevée, avec une dégradation totale des deux molécules sondes de COV à des températures inférieures à 170 °C. De telles températures n'ont pas été enregistrées auparavant pour les échantillons de Pt(II). De telles températures n'ont pas été enregistrées auparavant pour les matériaux supportés par le NaY.

Published
2022

37. Experimental characterization of three-dimensional Graphene’s thermoacoustic response and its theoretical modelling

Author

R. Lardat, Philippe Pernod, Edwin Hang Tong Teo, Dunlin Tan, Philippe Coquet, Olivier Bou-Matar, Zhi Lin Ngoh, Stefano Giordano, Pierre Guiraud, CNRS International - NTU - Thales Research Alliance (CINTRA), THALES [France]-Nanyang Technological University [Singapour]-Centre National de la Recherche Scientifique (CNRS), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Thales Underwater Systems (TUS), THALES [France], This study is supported in part by the Economic Development Board of Singapore under the Industrial Postgraduate Program (EDB-IPP) with Thales Solutions Asia Pte Ltd and Temasek Laboratories@Nanyang Technological University seed funding. It is also supported by the French DGA (Direction Générale de l'Armement) under the Conventions Industrielles de Formation par la REcherche Program (CIFRE) with Thales Underwater Systems. This study is developed in collaboration with CINTRA, UMI 3288 CNRS/NTU/THALES (Singapore)., CNRS International NTU THALES Research Alliance (UMI CINTRA), THALES-Nanyang Technological University [Singapour]-Centre National de la Recherche Scientifique (CNRS), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), THALES, School of Electrical and Electronic Engineering, Thales Solutions Asia Pte Ltd, Thales Underwater Systems, and Temasek Laboratories

Subjects
Materials science, theoretical modelling, Scanning electron microscope, thermoacoustics, chemistry.chemical_element, loudspeaker, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, chemical vapor deposition, [SPI.MAT]Engineering Sciences [physics]/Materials, law.invention, symbols.namesake, law, General Materials Science, three-dimensional graphene (3D-C), [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Graphene, business.industry, Thermoacoustics, Three-dimensional Graphene, General Chemistry, 021001 nanoscience & nanotechnology, Compression (physics), Microstructure, 0104 chemical sciences, Characterization (materials science), chemistry, symbols, Optoelectronics, Electrical and electronic engineering::Nanoelectronics [Engineering], 0210 nano-technology, Raman spectroscopy, business, Carbon
Abstract

In the past decade, a lot of research has been conducted on the potential of carbon nanostructured materials to emit sound via thermoacoustics through both simulations and experiments. However, experimental validation of simulations for three-dimensional graphene (3D-C), which has a complicated 3D structure, has yet to be achieved. In this paper, 3D-C is synthesized via thermal chemical vapor deposition and its microstructure and quality tested using Scanning Electron Microscopy and Raman spectroscopy respectively. Then, a two temperature model is used to predict the effects of numerous parameters: frequency, input power, sample size, connection area, connection path, pores per inch, thickness, compression as well as the addition of a backing on the acoustic performance and temperature of the sample. The experimental results presented in this paper validate the predictions of the adopted two temperature model. The efficiency of 3D-C is then compared with results presented in other studies to understand how the presented 3D-C fared against ones from the literature as well as other carbon nanostructured materials. Accepted version This study is supported in part by the Economic Development Board of Singapore under the Industrial Postgraduate Program (EDB-IPP) with Thales Solutions Asia Pte Ltd and Temasek Laboratories@Nanyang Technological University seed funding. It is also supported by the French DGA (Direction Générale de l'Armement) under the Conventions Industrielles de Formation par la REcherche Program (CIFRE) with Thales Underwater Systems. This study is developed in collaboration with CINTRA, UMI 3288 CNRS/NTU/THALES (Singapore).

Published
2020

38. Combinatıon of a Box-Behnken design technique with response surface methodology for optimization of the photocatalytic mineralization of C.I. Basic Red 46 dye from aqueous solution

Author

Abdelkrim Bouzaza, Mohammed Kheireddine Bouchareb, Yassine Kadmi, Mohammed Berkani, Mohammed Bouhelassa, Laboratoire Biotechnologies, Ecole Nationale Supérieure de Biotechnologie, Ville Universitaire Ali Mendjeli, BP E66 25100, Constantine, Algeria, Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 (LASIRE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL), Université d'Artois (UA), Université de Constantine, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Ali Mendjeli University City = Ville Universitaire Ali Mendjeli, Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL), Université Salah Boubnider Constantine 3, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Optimization, Mineralization, General Chemical Engineering, 02 engineering and technology, Wastewater, 010402 general chemistry, 01 natural sciences, lcsh:Chemistry, Response surface methodology, Ultraviolet light, [CHIM]Chemical Sciences, Photocatalysis, Photodegradation, Aqueous solution, Chemistry, General Chemistry, Mineralization (soil science), 021001 nanoscience & nanotechnology, Box–Behnken design, 0104 chemical sciences, Volumetric flow rate, lcsh:QD1-999, Chemical engineering, [SDE]Environmental Sciences, 0210 nano-technology, Azo dye
Abstract

International audience; The photodegradation of an industrial azo dye C.I Basic Red 46 was examined in a fixed-bed photoreactor using UV-lamps simulated to the solar irradiation. In our photodecolorization study, the UV/TiO2 process was optimized using the Box-Behnken approach to evaluate the synergistic effects of three independent parameters (initial concentration of the dye, flow rate, and UV intensity) on mineralization effectiveness. The response surface methodology was in good promise with the prediction model (coefficients of determination of decolorization and mineralization were R-Dec(2) = 0.997 and R-TOC(2) = 0.994, respectively). The effects of the factors could be estimated from a second-order polynomial equation and student's t-test. The optimal parameters of decolorization and mineralization were as follows: initial concentration of colorant 25 mg L-1, rate of fluid flow 0.3 L min(-1), and ultraviolet light intensity 38.1 W m(-2). The decolorization and mineralization removal efficiency under these optimal conditions were 100% and 57.63% respectively. These results indicate that optimization using response surface methodology, based on the Box-Behnken approach, is an excellent tool for determining the optimal conditions, and the process can be easily extrapolated for a specific treatment of real waste water containing the azo dye C.I Basic Red 46. Also, the intermediates that were produced during photodegradation process of Basic Red 46 were determined by GC/MS. (C) 2020 Published by Elsevier B.V. on behalf of King Saud University.

Published
2020

39. Upon the effect of Zn during friction stir welding of aluminum-copper and aluminum-brass systems

Author

Maya Marinova, Roland Taillard, Toru Nagaoka, Marie-NoËlle Avettand-Fènoël, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Osaka Research Institute of Industrial Science and Technology, Institut Michel Eugène Chevreul - FR 2638 (IMEC), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), and Université d'Artois (UA)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL)

Subjects
brass, 0209 industrial biotechnology, Materials science, Friction stir welding, Strategy and Management, Flatness (systems theory), Mechanical properties, 02 engineering and technology, Welding, Management Science and Operations Research, Industrial and Manufacturing Engineering, law.invention, Brass, 020901 industrial engineering & automation, law, copper and zinc interlayer, Phase transformations, Composite material, Microstructure, Material flow, Filler metal, [CHIM.MATE]Chemical Sciences/Material chemistry, Interface, 021001 nanoscience & nanotechnology, Shear (sheet metal), Lap joint, visual_art, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], visual_art.visual_art_medium, 0210 nano-technology, Aluminum
Abstract

International audience; The present study deals with the effect of Zn on the linear friction stir lap welding of Al to Cu or to brass with a pinless tool. Zn was considered either as a filler metal or as an element in solid solution in α-brass. The lap joint configuration with a groove machined at the top of the bottom plate was chosen in order to test for the first time the influence of liquid Zn at the interface in case of melting by avoiding its ejection. Besides, the use of a pin free tool to join three millimeters thick plates is challenging. The paper presents and discusses the macrostructure and microstructure of the various joints together with their mechanical properties. A strong emphasis is given to the lubricating action of a liquid phase on the material flow as well as on the mechanisms of phase transformations at the various interfaces. The present work reports an early investigation of the material flow in linear friction stir lap welding with a pinless tool. The lap shear tensile fracture behavior of the welds is related to their interface morphology and microstructure. In particular, the fairly good shear resistance of the brass-Zn-Al joint arises from the composite nature of its interface despite its flatness and high thickness.

Published
2020

40. A Review on High Pressure Experiments for Study of Crystallographic Behavior and Polymorphism of Pharmaceutical Materials

Author

Mathieu Guerain, Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), and Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
Diffraction, Phase transition, Materials science, [SDV]Life Sciences [q-bio], Pharmaceutical Science, 02 engineering and technology, Crystal structure, Crystallography, X-Ray, Spectrum Analysis, Raman, 030226 pharmacology & pharmacy, Phase Transition, law.invention, 03 medical and health sciences, symbols.namesake, 0302 clinical medicine, law, Molecule, Crystallization, 021001 nanoscience & nanotechnology, Crystallography, Polymorphism (materials science), X-ray crystallography, symbols, Powders, 0210 nano-technology, Raman spectroscopy
Abstract

A review of work on pharmaceutical molecular materials studied under high pressure was carried out. The behavior of the crystallographic structure of these materials is observed under high pressure thanks to X-ray diffraction laboratory, synchrotron experiments or Raman spectroscopy. In particular, the highlighting of phase transitions and the discovery of new crystallographic forms are an important application of these methods. Works performed from the last two decades shows that two ways are mainly used: direct compression of powders or single crystals and crystallization under high pressure in different solvents. The evolution of the cell volumes and lattice parameters of different compounds have been observed with direct compression experiments of the order of few GPa to few tens of GPa. On few compounds the discovery of new polymorphic forms is highlighted. High pressure crystallization experiments generally require lower pressure ranges, on the order of few hundred to few GPa. For numerous pharmaceutical molecules, new polymorphs but also salts, solvates, hydrates or co-crystals can be obtained. It depends on the solvents and pressure ranges chosen. It shows the possibility to select the desired crystallographic form of a given active principle by a judicious choice of these parameters.

Published
2020

41. Sliding mode control applied to a square-back Ahmed body

Author

Franck Kerhervé, Jean-Pierre Richard, Wafik Abassi, Laurent Keirsbulck, Marc Lippert, Maxime Feingesicht, Baptiste Plumjeau, Camila Chovet, Andrey Polyakov, Jean-Marc Foucaut, Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 (LAMIH), Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Centre National de la Recherche Scientifique (CNRS), Chalmers University of Technology [Göteborg], Turbulence Incompressible et Contrôle (TIC ), Département Fluides, Thermique et Combustion (FTC), Institut Pprime (PPRIME), Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS)-Institut Pprime (PPRIME), Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS), Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 (LMFL), Ecole Centrale de Lille-ONERA-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Centre National de la Recherche Scientifique (CNRS)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centrale Lille, Laboratoire de Mécanique de Lille - FRE 3723 (LML), Université de Lille, Sciences et Technologies-Centrale Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 [LAMIH], Turbulence Incompressible et Contrôle [TIC ], Finite-time control and estimation for distributed systems [VALSE], Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 [LMFL], Institut Pprime [PPRIME], Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 [CRIStAL], and Laboratoire de Mécanique de Lille - FRE 3723 [LML]

Subjects
Computer science, bilinear time-delay model, General Physics and Astronomy, 02 engineering and technology, 01 natural sciences, Sliding mode control, [SPI.AUTO]Engineering Sciences [physics]/Automatic, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], 010305 fluids & plasmas, External flow, [SPI]Engineering Sciences [physics], flow control, sliding mode control, drag reduction unsteadiness of separated flows, 0203 mechanical engineering, Control theory, 0103 physical sciences, Aerodynamic drag, Trailing edge, ComputingMilieux_MISCELLANEOUS, Mathematical Physics, Mechanics, Lift (force), Flow control (fluid), 020303 mechanical engineering & transports, Particle image velocimetry, Drag
Abstract

International audience; We consider the first closed-loop separation control experiment on an Ahmed body using a robust, model-based strategy called "sliding mode control" (SMC). The goal is to reduce and further maintain the aerodynamic drag of the square-back Ahmed body flow at Re h = 9 × 10 4 (based on the body height). This study also investigates the practical feasibility of this approach which shows a great promise for industrial applications. The flow is manipulated by a slotted jet placed on the top trailing edge, combined with a predefined angle direction, and sensed by a drag balance. Base pressure and lift measurements are also obtained in real-time. The interaction between the air jet actuator and the mean near-wake flow are depicted by means of Particle Image Velocimetry. In order to compare this closed-loop strategy we first present two open-loop ones. Continuous blowing is initially used to directly influence the recirculation area and hence achieve a reduction in the drag. Approximately a drag reduction of 8% is accomplished making this approach the "optimal case" control strategy. However, because steady blowing mechanisms lead to the highest energy consumption scheme, this strategy will only serve as the first open-loop control reference. The second open-loop strategy involves three periodic forcing frequencies, St A = 0.0765, 0.135 & 0.405. The influence of these frequencies on the near-wake, and its further drag modification, will be further examined. The proposed sliding mode control (closed-loop strategy) is applied to the same Ahmed body configuration and compared to the open-loop cases. It will be designed on the basis of a simplified input-output model which was recently defined for another flow control application. Last, a second experiment is conducted so to show the disturbance rejection of the controller, corroborating the robustness and efficiency of this control approach. Its limitations and difficulties on an experimental setup are also discussed. SMC is able to reduce and maintain the drag to a desire set-point regardless external flow perturbations. Our control strategy was recently used in another context (flow reattachement on a wing) with the same robustness. These successes make guess it is applicable to multiple experimental and industrial contexts.

Published
2020

42. Friction-induced energy losses in mechanical contacts subject to random vibrations

Author

Antonio Papangelo, Vladislav Aleshin, Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Politecnico di Bari, Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)

Subjects
диссипация, Random vibrations, энергия, friction, 02 engineering and technology, Damping, Fractal dimension, Displacement (vector), Fractal, 0203 mechanical engineering, Method of memory diagrams, Annulus (firestop), Frictional dissipation, случайные колебания, General Materials Science, трение, Mechanical energy, [PHYS.MECA.VIBR]Physics [physics]/Mechanics [physics]/Vibrations [physics.class-ph], Physics, контактная механика, Applied Mathematics, Mechanical Engineering, Mechanics, Dissipation, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Vibration, Contact mechanics, 020303 mechanical engineering & transports, Mechanics of Materials, Modeling and Simulation, tribology, 0210 nano-technology, contact
Abstract

International audience; In this paper, we apply the previously developed Method of Memory Diagrams (MMD) to the description of an axisymmetric mechanical contact with friction subject to random vibrations. The MMD belongs to a family of semi-analytical methods of contact mechanics originating from the classical Cattaneo-Mindlin solution; it allows one to efficiently compute mechanical and energetic responses to complex excitation signals such as random or acoustic ones. For an axisymmetric contact driven by random normal and tangential displacements having fractal statistical properties, we calculate the friction-induced mechanical energy loss averaged over a large number of realizations. In the considered problem, this energy depends on a very restrained number of parameters: on the rms of random displacements, on the fractal dimension, and on the upper cut-off frequency of the fractal spectrum. In addition, a radial distribution of the dissipated energy has been obtained that has a direct relation to wear in the contact system. For small displacement amplitudes, wear should be expected in an annulus inside of a mean contact circle whereas for large displacements it will start at the contact center.

Published
2020

43. Tensor cross-view quadratic discriminant analysis for kinship verification in the wild

Author

Abdelmalik Ouamane, Oualid Laiadi, Abdenour Hadid, Abdelmalik Taleb-Ahmed, Abdelhamid Benakcha, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), University Mohamed Khider Biskra, Algeria, Laboratoire de Génie Electrique [Univ. Biskra] (LGEB), Université Mohamed Khider de Biskra (BISKRA), COMmunications NUMériques - IEMN (COMNUM - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), University of Oulu, Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)

Subjects
0209 industrial biotechnology, Multilinear map, cross-view, Computer science, Tensor XQDA, Cognitive Neuroscience, Feature vector, 02 engineering and technology, Kinship verification, [INFO.INFO-AI]Computer Science [cs]/Artificial Intelligence [cs.AI], Cross-view, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], [SPI]Engineering Sciences [physics], 020901 industrial engineering & automation, Artificial Intelligence, Margin (machine learning), Tensor (intrinsic definition), 0202 electrical engineering, electronic engineering, information engineering, [INFO]Computer Science [cs], Tensor, tensor XQDA, business.industry, kinship verification, Pattern recognition, Quadratic classifier, 16. Peace & justice, [SPI.TRON]Engineering Sciences [physics]/Electronics, Computer Science Applications, Transformation (function), Metric (mathematics), 020201 artificial intelligence & image processing, Artificial intelligence, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Subspace topology
Abstract

International audience; This paper presents a new Tensor Cross-view Quadratic Discriminant Analysis (TXQDA) method based on the XQDA method for kinship verification in the wild. Many researchers used metric learning methods and have achieved reasonably good performance in kinship verification, none of these methods looks at the kinship verification as a cross-view matching problem. To tackle this issue, we propose a tensor cross-view method to train multilinear data using local histograms of local features descriptors. Therefore, we learn a hierarchical tensor transformation to project each pair face images into the same implicit feature space, in which the distance of each positive pair is minimized and that of each negative pair is maximized. Moreover, TXQDA was proposed to separate the multifactor structure of face images (i.e. kinship, age, gender, expression, illumination and pose) from different dimensions of the tensor. Thus, our TXQDA achieves better classification results through discovering a low dimensional tensor subspace that enlarges the margin of different kin relation classes. Experimental evaluation on five challenging databases namely Cornell KinFace, UB KinFace, TSKinFace, KinFaceW-II and FIW databases, show that the proposed TXQDA significantly outperforms the current state of the art. (c) 2019 Elsevier B.V. All rights reserved.

Published
2020

44. Metrological performances of fouling sensors based on steady thermal excitation applied to bioprocess

Author

M. Bégué, Y. Boukazia, L. Fillaudeau, M. Cadé, F. Bellouard, Guillaume Delaplace, N. Semmar, Processus aux Interfaces et Hygiène des Matériaux (PIHM), Institut National de la Recherche Agronomique (INRA), Heito SME, Heito S.A., Institut de Cancérologie de l'Ouest, Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Toulouse Biotechnology Institute (TBI), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Aqualabo, Laboratoire Matériaux et Durabilité des constructions (LMDC), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Fédération de Recherche Fluides, Energie, Réacteurs, Matériaux et Transferts (FERMAT), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), BPI France (FUI AAP16, F1311001L), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Institut de Recherche Hydraulique, Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université Fédérale Toulouse Midi-Pyrénées

Subjects
0106 biological sciences, Work (thermodynamics), Materials science, General Chemical Engineering, Nuclear engineering, Heat transfer coefficient, 01 natural sciences, Biochemistry, 0404 agricultural biotechnology, 010608 biotechnology, Heat transfer, Thermal, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Fouling sensor, ComputingMilieux_MISCELLANEOUS, Microelectromechanical systems, MEMS structure, Fouling, Hot wire, 04 agricultural and veterinary sciences, 040401 food science, Steady thermal regime, 6. Clean water, Heat flux, Adhesive, Reduction (mathematics), Food and bioprocess, Food Science, Biotechnology
Abstract

International audience; Food and industrial bioprocesses are impacted by (biolfouling which generates failures from reduction of process efficiency (ex: reduction of heat transfer coefficient) up to health risk issue (e.g. biofilm formation). In present work, 3 fouling sensors based on a thermal excitation (steady thermal regime) were developed and described. These sensors were designed with different technologies (macro structure and Micro-Electro-Mechanical-Syste ms MEMS), geometries (intrusive cylindrical, flush plan) and packaging (presence or absence of cover panel) and compared. Laboratory setups were designed to characterize sensor responses under controlled operating conditions in batch and continuous process including clean condition and using layers of adhesive tape to simulate fouled conditions. Thermal responses from excitation under steady thermal regime at different heat flux were linearized then discussed as function of technology, geometry and packaging impacts. Packaging heat resistance, response times, efficient heat flux, and quantification of fouling were investigated. Finally, metrological limits were identified.

Published
2020

45. Adaptive Discontinuous Control for Homogeneous Systems Approximated by Neural Networks

Author

Andrey Polyakov, Mariana Ballesteros, Alexander S. Poznyak, Isaac Chairez, Denis Efimov, Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Instituto Politechnico National (IPN), and Instituto Politecnico Nacional [Mexico] (IPN)

Subjects
Lyapunov stability, 0209 industrial biotechnology, Adaptive control, Neural Networks, Computer simulation, Artificial neural network, Computer science, Homogeneity (statistics), Computer Science::Neural and Evolutionary Computation, 020208 electrical & electronic engineering, System Identification, System identification, Homogeneous function, 02 engineering and technology, Discontinuous Control, Adaptive Control, Nonlinear system, symbols.namesake, 020901 industrial engineering & automation, Homogeneous systems, Control and Systems Engineering, Control theory, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, 0202 electrical engineering, electronic engineering, information engineering, symbols
Abstract

International audience; This study is devoted to the design of an adaptive discontinuous control based on differential neural networks (DNNs) for a class of uncertain homogeneous systems. The control is based on the universal approximation properties of artificial neural networks (ANNs) applied on a certain class of homogeneous nonlinear functions. The adaptation laws for the DNNs parameters are obtained with the application of the Lyapunov stability theory and the homogeneity properties of the approximated nonlinear system. The stability analysis of the closed loop system with the proposed controller is presented. The estimation error in the approximation of the uncertain homogeneous functions is considered in the stability analysis. The performance of the controller is illustrated by means of a numerical simulation of a homogeneous model.

Published
2020

46. Estimation in uncertain switched systems using a bank of interval observers: local vs glocal approach

Author

Andrea Cristofaro, Tor Arne Johansen, Denis Efimov, Damiano Rotondo, Universitat Politècnica de Catalunya [Barcelona] (UPC), Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Camerino = University of Camerino (UNICAM), Department of Engineering Cybernetics [Trondheim] (ITK NTNU), Norwegian University of Science and Technology [Trondheim] (NTNU), Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology (NTNU), This work has been supported by the Spanish State Research Agency (AEI)through the Maria de Maeztu Seal of Excellence to IRI (MDM-2016-0656) andthe grant Juan de la Cierva-Formacion (FJCI-2016-29019), by the ResearchCouncil of Norway through the AMOS Center, grant number 223254 and bythe University of Stavanger through the project IN-12267., Institut de Robòtica i Informàtica Industrial, Universitat Politècnica de Catalunya. SAC - Sistemes Avançats de Control, and University of Camerino

Subjects
Estimation, 0209 industrial biotechnology, Informàtica::Automàtica i control [Àrees temàtiques de la UPC], Observer (quantum physics), Noise (signal processing), Computer science, Reliability (computer networking), 020208 electrical & electronic engineering, Interval estimation, 02 engineering and technology, Interval (mathematics), Interval observers, Teknologi: 500 [VDP], [SPI.AUTO]Engineering Sciences [physics]/Automatic, Mode identification, 020901 industrial engineering & automation, Control theory [Classificació INSPEC], Control and Systems Engineering, Control theory, 0202 electrical engineering, electronic engineering, information engineering, Uncertain systems, State (computer science), Switched systems, Parametric statistics
Abstract

This paper discusses some issues related with the design of a bank of interval observers for uncertain switched systems, in which several sources of uncertainty are considered: parametric uncertainties, unknown disturbances, measurement noise, and unknown switching signal. More specifically, this paper focuses on analyzing the interval estimation accuracy when changes of active mode induce non-positivity of the interval state estimation errors. In particular, it is shown that by combining two types of interval observers, referred to as local and global, the accuracy and reliability of the estimation can be improved. The properties of the obtained so-called glocal observer are investigated and illustrated by means of numerical simulations. This work has been supported by the Spanish State Research Agency (AEI)through the Maria de Maeztu Seal of Excellence to IRI (MDM-2016-0656) andthe grant Juan de la Cierva-Formacion (FJCI-2016-29019), by the ResearchCouncil of Norway through the AMOS Center, grant number 223254 and bythe University of Stavanger through the project IN-12267

Published
2020

47. Observer-Based Robust Control of a Continuous Bioreactor with Heterogeneous Community

Author

Jean-Luc Gouzé, Alex dos Reis de Souza, Denis Efimov, Andrey Polyakov, Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Biological control of artificial ecosystems (BIOCORE), Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), and Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
0209 industrial biotechnology, Observer (quantum physics), Computer science, 020208 electrical & electronic engineering, Control (management), Robust control, Bioreactor, 02 engineering and technology, Limiting, [SPI.AUTO]Engineering Sciences [physics]/Automatic, 020901 industrial engineering & automation, Biochemical process, Control and Systems Engineering, Control theory, 0202 electrical engineering, electronic engineering, information engineering, Observer based, Observer-based control
Abstract

International audience; This work addresses the problem of robust control of the continuous bioreactor-namely the chemostat-using an observer-based approach. We design a control law aiming to regulate the growth of a certain species and to stabilize the output-a growth-associated product of interest-in a prescribed level. In addition, to avoid the single-species dogma (which takes only one species into account for control design), we add to the microbial community unknown species competing for the limiting substrate. Finally, this control architecture is able to maintain the productivity, despite this competing heterogeneity (or biodiversity) of the community.

Published
2020

48. Relationship between design strategies of commercial three-way monolithic catalysts and their performances in realistic conditions

Author

André Nicolle, Christophe Chaillou, Caroline Norsic, Shreya Nandi, Christophe Dujardin, Emmanuel Laigle, Pascal Granger, Paola Arango, Melissandre Richard, Université de Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Cost effectiveness, Automotive industry, Three-way catalysis, 02 engineering and technology, engineering.material, Monolithic Catalyst, Commercial Strategies, Washcoat, Emission control, 010402 general chemistry, 01 natural sciences, Catalysis, Reduction (complexity), Gasoline, Process engineering, NOx, business.industry, General Chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, 021001 nanoscience & nanotechnology, 0104 chemical sciences, engineering, Noble metal, 0210 nano-technology, Science, technology and society, business
Abstract

International audience; Monolith-shaped three-way catalysts (TWC) are always at the edge of science and technology as a response to the stringent updates on the emission standards worldwide. In spite of rapid research on TWC materials, the exact compositions adapted by major automotive companies are not fully known. This study focuses on comparing two fresh commercial monolithic catalysts for gasoline engines, namely, monolith-A and monolith-B, to highlight the significance of their manufacturing strategies by its characterization and catalytic evaluation under realistic lean/rich/stoichiometric regimes. Firstly, monolith-A demonstrates a zoning on its front and back side with high Pd and Rh loading to enhance CO/HC oxidation and NOx reduction, respectively, having higher amounts of trace dopants like La, Y, Pr and S. Whereas, monolith-B has a homogeneous composition with much lower noble metal/trace elements content without any Pr and S. Secondly, the double-layer washcoating is employed by following different routes with distinct compositions of alumina and ceria-zirconia. Monolith-B showed better low temperature CO oxidation performance while monolith-A performed better for NOx reduction owing to higher Rh loading. Overall, the zoning strategy of monolith-A raises question on its cost effectiveness in regards to its performance while poor reduction capabilities is exhibited by monolith-B. This study highlights that the latest TWC strategies have a scope of further development particularly with respect to the catalytic performance/expense ratio.

Published
2022

49. A highly efficient intumescent polybutylene succinate:Flame retardancy and mechanistic aspects

Author

Fei Xiao, Gaëlle Fontaine, Serge Bourbigot, Université de Lille, CNRS, INRAE, ENSCL, Unité Matériaux et Transformations (UMET) - UMR 8207, Unité Matériaux et Transformations - UMR 8207 [UMET], 174496|||Unité Matériaux et Transformations - UMR 8207 [UMET], 120930|||Centrale Lille, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Centrale Lille

Subjects
Flame retardancy, [CHIM.POLY]Chemical Sciences/Polymers, Polymers and Plastics, Mechanics of Materials, Materials Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, Ethylenediamine phosphate, Condensed Matter Physics, Melamine poly(aluminum phosphate), Zinc borate, Polybutylene succinate
Abstract

International audience; A new strategy was developed for the fabrication of intumescent flame retardant system to improve the fire performance of polybutylene succinate (PBS) based on the synergistic effect of ethylenediamine phosphate (EDAP) and melamine poly(aluminum phosphate) (MPAlP) as well as zinc borate (ZnB). Cone calorimetry results exhibited that, with only 10 wt.% total loading of additives, the peak heat release rate (pHRR) and total heat release (THR) of PBS/EDAP&MPAlP(7:3, 8%)/ZnB(2%) were significantly reduced by 63% and 13%, respectively, in comparison to PBS. Meanwhile, the fire growth rate index (FIGRA) and maximum average rate of heat emission (MARHE) were decreased by 43% and 48% respectively, and its flameout time reached up to 840 s from 493 s for neat PBS. It should be noted that solid-state MAS NMR (11B, 13C, 27Al, and 31P) technique provided information to determine chemistry in the condensed phase during combustion. It was evidenced that the combination of EDAP/MPAlP and ZnB led to the formation of a protective intumescent char embedded with highly thermally stable phosphate species (e.g., boron phosphate and zinc phosphate). They improved the cohesion (crack-free) and stability as well as the resistance of the char, thus improving the fire retardancy of PBS. Additionally, PBS/EDAP&MPAlP(7:3,8%)/ZnB(2%) showed low smoke emission and good thermal/mechanical properties, thanks to the introduction of zinc borate. As a result, this work provides a new perspective for the development of new intumescent flame retardant systems toward PBS.

Published
2022

50. Optimizing Convolutional Neural Networks Architecture Using a Modified Particle Swarm Optimization for Image Classification

Author

D. Elhani, A.C. Megherbi, A. Zitouni, F. Dornaika, S. Sbaa, A. Taleb-Ahmed, University of Biskra Mohamed Khider, Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G ), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Ho Chi Minh City Open University, COMmunications NUMériques - IEMN (COMNUM - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and No information found

Subjects
[PHYS]Physics [physics], History, Polymers and Plastics, Image classification, Particle swarm optimization, General Engineering, Industrial and Manufacturing Engineering, Computer Science Applications, [SPI]Engineering Sciences [physics], Artificial Intelligence, Neural network design, Convolutional neural networks, Business and International Management, Hyperparameters
Abstract

International audience; Although Convolutional Neural Networks (CNNs) have been shown to be highly effective in image classificationtasks, designing their architecture to achieve optimal results is often challenging. This process is time consuming, requires significant effort and expertise, and is complicated by the large number of hyperparameters. Toaddress this problem, in this work we propose an approach that reduces human intervention and automaticallygenerates the best CNN design. Our approach uses a variant of Particle Swarm Optimization (PSO), calledParticle Swarm Optimization without Velocity (PSWV), to speed up convergence and reduce the numberof iterations required to determine the optimal CNN hyperparameters. We developed a novel strategy todetermine the updated position of each particle using a linear combination of the best position of the particleand the best position of the swarm without relying on the velocity equation. Our algorithm harnesses thepower of the variable-length encoding strategy to represent particles within the population, thereby providingswift convergence towards the best architecture. We evaluate our proposed algorithm against several recentalgorithms in the literature by using nine benchmark datasets for classification tasks and comparing it to 27other algorithms, including state-of-the-art ones. Our experimental results show that our proposed method,pswvCNN, is able to quickly find effective CNN architectures that provide comparable performance to the bestcurrently available designs, indicating its significant potential.

Published
2022

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