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98 results on '"Le Duc, M."'

1. Lyapunov-Based Deep Residual Neural Network (ResNet) Adaptive Control

Author

Patil, Omkar Sudhir, Le, Duc M., Griffis, Emily J., and Dixon, Warren E.

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

Deep Neural Network (DNN)-based controllers have emerged as a tool to compensate for unstructured uncertainties in nonlinear dynamical systems. A recent breakthrough in the adaptive control literature provides a Lyapunov-based approach to derive weight adaptation laws for each layer of a fully-connected feedforward DNN-based adaptive controller. However, deriving weight adaptation laws from a Lyapunov-based analysis remains an open problem for deep residual neural networks (ResNets). This paper provides the first result on Lyapunov-derived weight adaptation for a ResNet-based adaptive controller. A nonsmooth Lyapunov-based analysis is provided to guarantee asymptotic tracking error convergence. Comparative Monte Carlo simulations are provided to demonstrate the performance of the developed ResNet-based adaptive controller. The ResNet-based adaptive controller shows a 64% improvement in the tracking and function approximation performance, in comparison to a fully-connected DNN-based adaptive controller.

Published
2024

2. An Abnormal Heart Rhythm Warning System Based on a Low-Cost Two-Electrode ECG Signal Using Threshold and Neural Network Approaches

Author

Nguyen, Thuong H. N., Truong, Mai Hue T., Le, Duc M., Tran, Ngoc Huynh, Pham, Thi Hai Hau, Nguyen, B. Hoang, Pham, Tuan V., Nguyen, Anh Thu T., Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Anh, Ngoc Le, editor, Koh, Seok-Joo, editor, Nguyen, Thi Dieu Linh, editor, Lloret, Jaime, editor, and Nguyen, Thanh Tung, editor

Published
2022
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3. Outcomes of very young women and adolescent (VYWAA) with breast cancer (BC) in rural and urban Saskatchewan: A population-based cohort study.

Author

Arnold, Erika, primary, Laubscher, Devin, additional, Saeed, Huzaifa, additional, Ahmed, Osama, additional, Bashir, Ayesha, additional, Chalchal, Haji I., additional, Deobald, Raymond Gilbert, additional, El-Gayed, Ali Abdel Halim, additional, Groot, Gary, additional, Haider, Kamal, additional, Iqbal, Nayyer Iqbal Medical Prof., additional, Johnson, Kate, additional, Le, Duc M, additional, Mahmood, Shazia, additional, Manna, Madhumita, additional, Meiers, Pamela, additional, Mondal, Prosanta, additional, Sami, Amer, additional, Wright, Philip, additional, and Ahmed, Shahid, additional

Published
2024
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32. LOTVS: a global collection of permanent vegetation plots

Author

Daniel Gómez-García, Peter B. Adler, Norbert Juergens, Miklós Kertész, de Bello F, Katja Klumpp, Wolfgang Schmidt, Jiří Danihelka, Lauren M. Hallett, Ricardo Ibáñez, Luisa Conti, Rob H. Marrs, Josep Peñuelas, Martin Zobel, Martin Schuetz, Begoña Peco, Karsten Wesche, Eric Garnier, Hana Skálová, Frédérique Louault, Marie Šmilauerová, Thomas Galland, Fei-Hai Yu, Anna E-Vojtkó, Martin Stock, Tomáš Herben, Wiser Sk, Goetzenberger L, Marc Estiarte, Le Duc M, Truman P. Young, Minfang Song, Enrique Valencia, Ricardo García-González, Duncan M. Kimuyu, Gábor Ónodi, Hannah L. Buckley, Petr Šmilauer, Sperandii Mg, Marta Montenegro Rueda, Ute Schmiedel, James Val, Nicola J. Day, Paertel M, Jürgen Dengler, Vandvik, Bazzichetto M, Jan Lepš, Susan Harrison, David J. Eldridge, Anke Jentsch, Robin J. Pakeman, Christian Smit, and Ben A. Woodcock

Subjects
0106 biological sciences, Resource (biology), 010504 meteorology & atmospheric sciences, Ecology (disciplines), Biodiversity, Sampling (statistics), Plant community, Ecological succession, Vegetation, 15. Life on land, 010603 evolutionary biology, 01 natural sciences, Plant ecology, Geography, Physical geography, 0105 earth and related environmental sciences
Abstract

Analysing temporal patterns in plant communities is extremely important to quantify the extent and the consequences of ecological changes, especially considering the current biodiversity crisis. Long-term data collected through the regular sampling of permanent plots represent the most accurate resource to study ecological succession, analyse the stability of a community over time and understand the mechanisms driving vegetation change. We hereby present the LOng-Term Vegetation Sampling (LOTVS) initiative, a global collection of vegetation time-series derived from the regular monitoring of vascular plants in permanent plots. With 79 datasets from five continents and 7789 vegetation time-series monitored for at least six years and mostly on an annual basis, LOTVS possibly represents the largest collection of temporally fine-grained vegetation time-series derived from permanent plots and made accessible to the research community. As such, it has an outstanding potential to support innovative research in the fields of vegetation science, plant ecology and temporal ecology.

Published
2021
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41. The effectiveness of old and new strategies for the long-term control of Pteridium aquilinum, an 8-year test.

Author

Milligan, G, Cox, E S, Alday, J G, Santana, V M, McAllister, H A, Pakeman, R J, Le Duc, M G, Marrs, R H, and Clements, David

Subjects
PTERIDIUM aquilinum, WEED control, PERENNIALS, HERBICIDES, ASULAM
Abstract

There is a need for management strategies to control dominant perennial weeds and restore seminatural communities. We compared the effects of five weed control treatments on dense Pteridium aquilinum relative to an untreated experimental control over an 8-year period with the aim of restoring acid grassland. The weed control treatments tested were as follows: cutting and bruising, both twice and thrice annually, and herbicide treatment (asulam in year 1 followed by annual spot retreatment of all emergent fronds). Pteridium aquilinum performance and plant species composition were monitored. Data were analysed using Bayesian mixed-effect models and multivariate techniques. Cutting twice and thrice yearly and the asulam treatment all reduced frond density to zero; both bruising treatments were ineffective. The plant communities in the cut and asulam-treated plots showed differences from the untreated and bruised plots; the asulam-treated plots contained more ruderal species and the cut plots were more typical of acid grassland. Acid grassland recovery was fastest in the asulam-treated plots, but the cut plots caught up after approximately 5 years. There were two important conclusions. First, an intractable weed like P. aquilinum can be eradicated and a vegetation more suited for grazing can be achieved by the continuous application of some treatments over many years. Here, success was achieved by cutting twice/thrice annually, or by a single asulam application followed by annual spot spraying of all emergent fronds for 8 years. Second, bruising, a treatment favoured by some conservation organisations, did not work and cannot be recommended. The use of long-term, continuously applied treatments might be considered for all perennial weeds with large underground root/rhizome systems. [ABSTRACT FROM AUTHOR]

Published
2016
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