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520 results on '"CHEN, G. J."'

2. Simulation and Experimental Study on Breakage of Ampoule Bottle Based on an Automatic Opening Device

Author

Gong, Y. P., Bi, Z. K., Wang, F., Sun, H. L., Ge, A. L., He, Z. S., Chen, G. J., Jin, T., Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Martin, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, Duan, Baoyan, editor, Umeda, Kazunori, editor, and Hwang, Woonbong, editor

Published
2020
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5. Cascaded Deep Neural Network Based Adaptive Precoding for Distributed Massive MIMO Systems

Author

Ge, L. J., Niu, S. X., Shi, C. P., Guo, Y. C., Chen, G. J., Ge, L. J., Niu, S. X., Shi, C. P., Guo, Y. C., and Chen, G. J.

Abstract

In time-division duplex (TDD) distributed large-scale multiple input multiple output (DM-MIMO) systems, the traditional downlink channel precoding method is used to resist inter-user interference (IUI). However, when the Channel State Information (CSI) is incomplete, the performance loss is serious, not only the bit error rate is high, but also the complexity of the traditional precoding algorithm is high. In order to solve these problems, this paper proposes an adaptive precoding framework based on deep learning (DL) for joint training and split application deployment. First, we train a channel emulator deep neural network (CE-DNN) to learn and simulate the transmission process of the wireless communication channel. Then, we concatenate an untrained precoding DNN (P-DNN) with a trained CE-DNN and retrain the cascaded neural network to converge. The last step is to obtain the P-DNN, namely the adaptive precoding network, by dismantling the joint trained network. Simulation results show that, when CSI is imperfect, the proposed method is compared with Tomlinson-Harashima precoding (THP) and block diagonalization (BD) precoding. The proposed method has a lower mean square error (MSE) and higher spectrum efficiency, as well as a bit error rate (BER) performance close to the THP. The source codes and the neural network codes are available on request.

Published
2024

6. Interfacial stress engineering toward enhancement of ferroelectricity in Al doped HfO2 thin films.

Author

Chen, S X, Chen, M M, Liu, Y, Cao, D W, and Chen, G J

Subjects
INTERFACIAL stresses, SUBSTRATES (Materials science), THIN films, FERROELECTRICITY, CRYSTALLIZATION, FERROELECTRIC thin films
Abstract

Ferroelectric HfO2 has attracted much attention owing to its superior ferroelectricity at an ultra-thin thickness and good compatibility with Si-based complementary metal–oxide–semiconductor (CMOS) technology. However, the crystallization of polar orthorhombic phase (o-phase) HfO2 is less competitive, which greatly limits the ferroelectricity of the as-obtained ferroelectric HfO2 thin films. Fortunately, the crystallization of o-phase HfO2 can be thermodynamically modulated via interfacial stress engineering. In this paper, the growth of improved ferroelectric Al doped HfO2 (HfO2:Al) thin films on (111)-oriented Si substrate has been reported. Structural analysis has suggested that nonpolar monoclinic HfO2:Al grown on (111)-oriented Si substrate suffered from a strong compressive strain, which promoted the crystallization of (111)-oriented o-phase HfO2 in the as-grown HfO2:Al thin films. In addition, the in-plane lattice of (111)-oriented Si substrate matches well with that of (111)-oriented o-phase HfO2, which further thermally stabilizes the o-phase HfO2. Accordingly, an improved ferroelectricity with a remnant polarization (2 P r) of 26.7 μC/cm2 has been obtained. The results shown in this work provide a simple way toward the preparation of improved ferroelectric HfO2 thin films. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Rate enhancement and multi-relay selection schemes for application in wireless cooperative networks

Author

Chen, G. J.

Subjects
621.382
Abstract

In this thesis new methods are presented to achieve performance enhancement in wireless cooperative networks. In particular, techniques to improve transmission rate, mitigate asynchronous transmission and maximise end-to-end signal-to-noise ratio are described. An offset transmission scheme with full interference cancellation for a two-hop synchronous network with frequency flat links and four relays is introduced. This approach can asymptotically, as the symbol block size increases, achieve maximum transmission rate together with full cooperative diversity provided the destination node has multiple antennas. A novel full inter-relay interference cancellation method that also achieves asymptotically maximum rate and full cooperative diversity is then designed which only requires a single antenna at the destination node. Extension to asynchronous networks is then considered through the use of orthogonal frequency division multiplexing (OFDM) type transmission with a cyclic prefix, and interference cancellation techniques are designed for situations when synchronization errors are present in only the second hop or both the first and second hop. End-to-end bit error rate evaluations, with and without outer coding, are used to assess the performance of the various offset transmission schemes. Multi-relay selection methods for cooperative amplify and forward type networks are then studied in order to overcome the degradation of end-to-end bit error rate performance in single-relay selection networks when there are feedback errors in the destination to relay node links. Outage probability analysis for two and four relay selection is performed to show the advantage of multi-relay selection when no interference occurs and when adjacent cell interference is present both at the relay nodes and the destination node. Simulation studies are included which support the theoretical expressions. Finally, outage probability analysis of a cognitive amplify and forward type relay network with cooperation between certain secondary users, chosen by single and multi-relay (two and four) selection is presented. The cognitive relays are assumed to exploit an underlay approach, which requires adherence to an interference constraint on the primary user. The relay selection is performed either with a max-min strategy or one based on maximising exact end-to-end signal-to-noise ratio. The analyses are again confirmed by numerical evaluations.

Published
2012

9. Embracing Monogenic Parkinson's Disease: The MJFF Global Genetic PD Cohort

Author

Vollstedt, E.-J. Schaake, S. Lohmann, K. Padmanabhan, S. Brice, A. Lesage, S. Tesson, C. Vidailhet, M. Wurster, I. Hentati, F. Mirelman, A. Giladi, N. Marder, K. Waters, C. Fahn, S. Kasten, M. Brüggemann, N. Borsche, M. Foroud, T. Tolosa, E. Garrido, A. Annesi, G. Gagliardi, M. Bozi, M. Stefanis, L. Ferreira, J.J. Correia Guedes, L. Avenali, M. Petrucci, S. Clark, L. Fedotova, E.Y. Abramycheva, N.Y. Alvarez, V. Menéndez-González, M. Jesús Maestre, S. Gómez-Garre, P. Mir, P. Belin, A.C. Ran, C. Lin, C.-H. Kuo, M.-C. Crosiers, D. Wszolek, Z.K. Ross, O.A. Jankovic, J. Nishioka, K. Funayama, M. Clarimon, J. Williams-Gray, C.H. Camacho, M. Cornejo-Olivas, M. Torres-Ramirez, L. Wu, Y.-R. Lee-Chen, G.-J. Morgadinho, A. Pulkes, T. Termsarasab, P. Berg, D. Kuhlenbäumer, G. Kühn, A.A. Borngräber, F. de Michele, G. De Rosa, A. Zimprich, A. Puschmann, A. Mellick, G.D. Dorszewska, J. Carr, J. Ferese, R. Gambardella, S. Chase, B. Markopoulou, K. Satake, W. Toda, T. Rossi, M. Merello, M. Lynch, T. Olszewska, D.A. Lim, S.-Y. Ahmad-Annuar, A. Tan, A.H. Al-Mubarak, B. Hanagasi, H. Koziorowski, D. Ertan, S. Genç, G. de Carvalho Aguiar, P. Barkhuizen, M. Pimentel, M.M.G. Saunders-Pullman, R. van de Warrenburg, B. Bressman, S. Toft, M. Appel-Cresswell, S. Lang, A.E. Skorvanek, M. Boon, A.J.W. Krüger, R. Sammler, E.M. Tumas, V. Zhang, B.-R. Garraux, G. Chung, S.J. Kim, Y.J. Winkelmann, J. Sue, C.M. Tan, E.-K. Damásio, J. Klivényi, P. Kostic, V.S. Arkadir, D. Martikainen, M. Borges, V. Hertz, J.M. Brighina, L. Spitz, M. Suchowersky, O. Riess, O. Das, P. Mollenhauer, B. Gatto, E.M. Petersen, M.S. Hattori, N. Wu, R.-M. Illarioshkin, S.N. Valente, E.M. Aasly, J.O. Aasly, A. Alcalay, R.N. Thaler, A. Farrer, M.J. Brockmann, K. Corvol, J.-C. Klein, C. Aasly, A. Aasly, J.O. Abramycheva, N.Y. Ahmad-Annuar, A. Albanese, A. Alcalay, R.N. Aldakheel, A. Alkhairallah, T. Al-Mubarak, B. Al-tassan, N. Alvarez, V. Amami, P. Annesi, G. Appel-Cresswell, S. Leite, M.A.A. Arkadir, D. Avenali, M. Ferraz, H.B. and Vollstedt, E.-J. Schaake, S. Lohmann, K. Padmanabhan, S. Brice, A. Lesage, S. Tesson, C. Vidailhet, M. Wurster, I. Hentati, F. Mirelman, A. Giladi, N. Marder, K. Waters, C. Fahn, S. Kasten, M. Brüggemann, N. Borsche, M. Foroud, T. Tolosa, E. Garrido, A. Annesi, G. Gagliardi, M. Bozi, M. Stefanis, L. Ferreira, J.J. Correia Guedes, L. Avenali, M. Petrucci, S. Clark, L. Fedotova, E.Y. Abramycheva, N.Y. Alvarez, V. Menéndez-González, M. Jesús Maestre, S. Gómez-Garre, P. Mir, P. Belin, A.C. Ran, C. Lin, C.-H. Kuo, M.-C. Crosiers, D. Wszolek, Z.K. Ross, O.A. Jankovic, J. Nishioka, K. Funayama, M. Clarimon, J. Williams-Gray, C.H. Camacho, M. Cornejo-Olivas, M. Torres-Ramirez, L. Wu, Y.-R. Lee-Chen, G.-J. Morgadinho, A. Pulkes, T. Termsarasab, P. Berg, D. Kuhlenbäumer, G. Kühn, A.A. Borngräber, F. de Michele, G. De Rosa, A. Zimprich, A. Puschmann, A. Mellick, G.D. Dorszewska, J. Carr, J. Ferese, R. Gambardella, S. Chase, B. Markopoulou, K. Satake, W. Toda, T. Rossi, M. Merello, M. Lynch, T. Olszewska, D.A. Lim, S.-Y. Ahmad-Annuar, A. Tan, A.H. Al-Mubarak, B. Hanagasi, H. Koziorowski, D. Ertan, S. Genç, G. de Carvalho Aguiar, P. Barkhuizen, M. Pimentel, M.M.G. Saunders-Pullman, R. van de Warrenburg, B. Bressman, S. Toft, M. Appel-Cresswell, S. Lang, A.E. Skorvanek, M. Boon, A.J.W. Krüger, R. Sammler, E.M. Tumas, V. Zhang, B.-R. Garraux, G. Chung, S.J. Kim, Y.J. Winkelmann, J. Sue, C.M. Tan, E.-K. Damásio, J. Klivényi, P. Kostic, V.S. Arkadir, D. Martikainen, M. Borges, V. Hertz, J.M. Brighina, L. Spitz, M. Suchowersky, O. Riess, O. Das, P. Mollenhauer, B. Gatto, E.M. Petersen, M.S. Hattori, N. Wu, R.-M. Illarioshkin, S.N. Valente, E.M. Aasly, J.O. Aasly, A. Alcalay, R.N. Thaler, A. Farrer, M.J. Brockmann, K. Corvol, J.-C. Klein, C. Aasly, A. Aasly, J.O. Abramycheva, N.Y. Ahmad-Annuar, A. Albanese, A. Alcalay, R.N. Aldakheel, A. Alkhairallah, T. Al-Mubarak, B. Al-tassan, N. Alvarez, V. Amami, P. Annesi, G. Appel-Cresswell, S. Leite, M.A.A. Arkadir, D. Avenali, M. Ferraz, H.B.

Abstract

Background: As gene-targeted therapies are increasingly being developed for Parkinson's disease (PD), identifying and characterizing carriers of specific genetic pathogenic variants is imperative. Only a small fraction of the estimated number of subjects with monogenic PD worldwide are currently represented in the literature and availability of clinical data and clinical trial-ready cohorts is limited. Objective: The objectives are to (1) establish an international cohort of affected and unaffected individuals with PD-linked variants; (2) provide harmonized and quality-controlled clinical characterization data for each included individual; and (3) further promote collaboration of researchers in the field of monogenic PD. Methods: We conducted a worldwide, systematic online survey to collect individual-level data on individuals with PD-linked variants in SNCA, LRRK2, VPS35, PRKN, PINK1, DJ-1, as well as selected pathogenic and risk variants in GBA and corresponding demographic, clinical, and genetic data. All registered cases underwent thorough quality checks, and pathogenicity scoring of the variants and genotype–phenotype relationships were analyzed. Results: We collected 3888 variant carriers for our analyses, reported by 92 centers (42 countries) worldwide. Of the included individuals, 3185 had a diagnosis of PD (ie, 1306 LRRK2, 115 SNCA, 23 VPS35, 429 PRKN, 75 PINK1, 13 DJ-1, and 1224 GBA) and 703 were unaffected (ie, 328 LRRK2, 32 SNCA, 3 VPS35, 1 PRKN, 1 PINK1, and 338 GBA). In total, we identified 269 different pathogenic variants; 1322 individuals in our cohort (34%) were indicated as not previously published. Conclusions: Within the MJFF Global Genetic PD Study Group, we (1) established the largest international cohort of affected and unaffected individuals carrying PD-linked variants; (2) provide harmonized and quality-controlled clinical and genetic data for each included individual; (3) promote collaboration in the field of genetic PD with a view to

Published
2023

15. EFFECT OF SAND COVERING THICKNESS ON DIFFERENT TILLAGE STATE SOIL WATER AND SALT TRANSPORT LAW UNDER BRACKISH WATER IRRIGATION.

Author

ZHAO, T. H., CHEN, G. J., and SUN, Q.

Subjects
BRACKISH waters, SALINE waters, TILLAGE, IRRIGATION water, SOIL moisture, SALINE water conversion, SOIL salinity, SAND dunes
Abstract

Using indoor soil column simulation test, this paper contrastively studied the effects of different sand covering thicknesses on decades' tillage land soil and idle land soil water and salt distribution and transport law in the same area under brackish water irrigation. In the test, 4 g/L brackish water was used for irrigation, and the sand covering thickness was selected as 3 cm, 6 cm and 9 cm respectively. With pure soil as a reference, the wetting front, cumulative infiltration, water content and electrical conductivity under each treatment condition were recorded and analyzed. The results showed that for two kinds of soil, 3 cm sand covering can not only promote soil water infiltration, but also effectively alleviate the salinization problem caused by the accumulation of salt surface, with good salt leaching effect; For idle land soil, 6 cm sand covering is good in water retention and salt suppression, and different sand covering thickness all have more positive significance to prevent soil salinization caused by brackish water irrigation than for decades' tillage land soil. Therefore, a reasonable sand cover thickness can be selected according to the soil conditions and farming needs to improve the soil planting environment and optimize the use of water resources. [ABSTRACT FROM AUTHOR]

Published
2023
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38. Multicenter Analysis of Glucocerebrosidase Mutations in Parkinsonʼs Disease

Author

Sidransky, E., Nalls, M. A., Aasly, J. O., Aharon-Peretz, J., Annesi, G., Barbosa, E. R., Bar-Shira, A., Berg, D., Bras, J., Brice, A., Chen, C.-M., Clark, L. N., Condroyer, C., De Marco, E. V., Dürr, A., Eblan, M. J., Fahn, S., Farrer, M. J., Fung, H.-C., Gan-Or, Z., Gasser, T., Gershoni-Baruch, R., Giladi, N., Griffith, A., Gurevich, T., Januario, C., Kropp, P., Lang, A. E., Lee-Chen, G.-J., Lesage, S., Marder, K., Mata, I. F., Mirelman, A., Mitsui, J., Mizuta, I., Nicoletti, G., Oliveira, C., Ottman, R., Orr-Urtreger, A., Pereira, L. V., Quattrone, A., Rogaeva, E., Rolfs, A., Rosenbaum, H., Rozenberg, R., Samii, A., Samaddar, T., Schulte, C., Sharma, M., Singleton, A., Spitz, M., Tan, E.-K., Tayebi, N., Toda, T., Troiano, A. R., Tsuji, S., Wittstock, M., Wolfsberg, T. G., Wu, Y.-R., Zabetian, C. P., Zhao, Y., and Ziegler, S. G.

Published
2009
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