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IEEE Global Communications Conference

作者： Xu Wang Liang Jin Kaizhi Huang Mingliang Li Yi Ming National Digital Switching System Engineering and Technological R&D Center

ISBN: (纸本)9781509013296

When extracting physical layer security secret key with multiple wireless channel samples, its capacity is affected by the time difference of channel sounding, terminal's moving speed, sampling period, the number of samples, and additive noise. In order to quantitatively analyze their effects and determine the constrains on the optimal sampling period, a closed-form solution to the physical layer secret key capacity in the time domain is derived over the uniform scattering environment. Simulation results indicate that the results of this paper can be applied to both the uniform and non-uniform scattering environment. Furthermore, the feasibility to extract physical layer secret key from the commercial Td-LTE and the promising co-frequency co-time full duplex communication systems is verified.

关键词： Physical layer security Physical layer secret key extraction Secret key capacity Correlated wireless channel samples Physical layer secret key Timedif TIME-dOMAIN wireless channels Additive noise sampling interval

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An Object detection Algorithm based on deformable Part Models with Bing Features

An Object Detection Algorithm based on Deformable Part Model...

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2016 5th International Conference on Advanced Materials and Computer Science(ICAMCS 2016)

作者： Chunwei Li Youjun Bu National Digital Switching System Engineering & Technological R&D Center

To solve the problem that the positioning strategy with sliding window approache requires exhaustive search in feature pyramids,the paper proposes an object detection algorithm based on deformable part models with Bing features to help object *** of all,input image are preprocessed with the objectness detection algorithm with Bing features and a set of potentia windows that may contain target objects are obtained,and then the deformable part model is regarde as the class-specific detector to match potential windows,at last Non-Maximum Suppression is use to merge and reduce window areas of results to obtain final detection *** experimental resul on Pascal VOC 2007 dataset show that the algorithm in the paper outperforms the original dPM in 1out of 20 classes,achieving an improvement of 2.7% mA P.

关键词： Object detection deformable part models binarized normed gradients feature

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Investigation of channel model for weakly coupled multicore fiber

arXiv

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arXiv 2017年

作者： Gan, Lin Shen, Li Tang, Ming Xing, Chen Li, Yanpeng Ke, Changjian Tong, Weijun Li, Borui Fu, Songnian Liu, deming National Engineering Laboratory for Next Generation Internet Access System School of Optics and Electronic Information Huazhong University of Science and Technology R & D Center

We investigate the evolution of decorrelation bandwidth of inter core crosstalk (IC-XT) in homogeneous weakly coupled multicore fibers (WC-MCFs). The modified mode-coupled equations (MCEs) are numerically solved by combining the fourth order runge-Kutta method and compound Simpson integral method. It can be theoretically and numerically observed that the decorrelation bandwidth of IC-XT decreases with transmission distance by fractional linear function. The evolution rule of IC-XT's decorrelation bandwidth is further confirmed by experiments, which can be used as an evaluation criterion for channel model. Finally, we propose a new channel model with the coupling matrix of IC-XT generated automatically by phase transfer function (PTF), which is in good agreement with the above evaluation criterion. We believe the proposed channel model can provide a good simulation platform for homogeneous WC-MCF based communication systems. Copyright © 2017, The Authors. All rights reserved.

关键词： Bandwidth

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Fatigue characteristics of sand-cast AZ91d magnesium alloy

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Journal of Magnesium and Alloys 2017年第1期5卷 1-12页

作者： Zhenming Li Alan ALuo Qigui Wang Hui Zou Jichun dai Liming Peng Institute of Sci-technology Strategy JiangXi Academy of SciencesNanchang 330096China The Ohio State University ColumbusOH 43210USA General Motors Company Global Propulsion SystemPontiacMI 48340USA Research Institute(R&D Center) China Baowu Steel Group CorporationShanghai 201900China National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite Shanghai Jiao Tong UniversityShanghai 200240China

The fatigue characteristics of the AZ91d-T6 alloy samples taken from engine blocks have been investigated at 20℃ and elevated temperature(150℃).The fatigue strength and cyclic stress amplitude of the alloy significantly decrease with the increase of the test temperature,although cyclic hardening occurs continuously until failure for both *** the increase of the temperature,the decreased fatigue life of the alloy tested at the same stress amplitude is mainly attributed to the decreased matrix strength and the increased hysteresis *** failure of the engine blocks made of AZ91d-T6 alloy is mainly controlled by casting *** the defect-free specimens,the crack initiation behavior is determined by the single-slip(20℃)and by environment-assisted cyclic slip(150℃)during fatigue,*** low-cycle fatigue lives of the alloy can be predicted using the Coffin-Manson relation and Basquin laws,the three-parameter equation and the energy-based concepts,while the high-cycle fatigue lives of the alloy fitted well with the developed long crack life model and MSF life models.

关键词： Magnesium alloy Engine blocks Fatigue properties Cyclic deformation behavior Temperature Fatigue life prediction

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LifeTime and improving European healthcare through cell-based interceptive medicine (vol 587, pg 377, 2020)

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NATUrE 2021年第7852期592卷 E8-E8页

作者： rajewsky, Nikolaus Almouzni, Genevieve Gorski, Stanislaw A. Aerts, Stein Amit, Ido Bertero, Michela G. Bock, Christoph Bredenoord, Annelien L. Cavalli, Giacomo Chiocca, Susanna Clevers, Hans de Strooper, Bart Eggert, Angelika Ellenberg, Jan Fernandez, Xose M. Figlerowicz, Marek Gasser, Susan M. Hubner, Norbert Kjems, Jorgen Knoblich, Jurgen A. Krabbe, Grietje Lichter, Peter Linnarsson, Sten Marine, Jean-Christophe Marioni, John C. Marti-renom, Marc A. Netea, Mihai G. Nickel, dorthe Nollmann, Marcelo Novak, Halina r. Parkinson, Helen Piccolo, Stefano Pinheiro, Ines Pombo, Ana Popp, Christian reik, Wolf roman-roman, Sergio rosenstiel, Philip Schultze, Joachim L. Stegle, Oliver Tanay, Amos Testa, Giuseppe Thanos, dimitris Theis, Fabian J. Torres-Padilla, Maria-Elena Valencia, Alfonso Vallot, Celine van Oudenaarden, Alexander Vidal, Marie Voet, Thierry Berlin Institute for Medical Systems Biology Max Delbrück Center for Molecular Medicine in the Helmholtz Association Berlin Germany Charité-Universitätsmedizin Berlin Germany Berlin Institute of Health (BIH) Berlin Germany German Center for Cardiovascular Research (DZHK) Partner Site Berlin Berlin Germany Institute for Biology Humboldt University of Berlin Berlin Germany Cardiovascular and Metabolic Sciences Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC) Berlin Germany Department of Pediatric Oncology/Hematology Charité-Universitätsmedizin Berlin Berlin Germany Institut Curie CNRS PSL Research University Sorbonne Université Nuclear Dynamics Unit Equipe Labellisée Ligue contre le cancer Paris France VIB Center for Brain and Disease Research Leuven Belgium Department of Human Genetics KU Leuven Leuven Belgium Department of Neurosciences KU Leuven Leuven Belgium UK Dementia Research Institute at UCL University College London London UK Wellcome Sanger Institute Wellcome Genome Campus Cambridge UK Department of Immunology Weizmann Institute of Science Rehovot Israel Centre for Genomic Regulation (CRG) Barcelona Institute of Science and Technology Barcelona Spain CNAG-CRG Centre for Genomic Regulation Barcelona Institute of Science and Technology Barcelona Spain Universitat Pompeu Fabra Barcelona Spain ICREA Barcelona Spain CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences Vienna Austria Department of Laboratory Medicine Medical University of Vienna Vienna Austria Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases Vienna Austria Department of Medical Humanities Julius Center for Health Sciences and Primary Care University Medical Center Utrecht Utrecht The Netherlands Institute of Human Genetics UMR 9002 CNRS and University of Montpellier Montpellier France Department of Experimental Oncology IEO European Institute of Oncology IRCCS Milan Italy Department of Oncology and Hemato

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Improvements of Acoustic Features for Speech Separation

Improvements of Acoustic Features for Speech Separation

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2016联合国际信息技术、机械与电子工程国际会议

作者： Lujun Li Chuxiong Qin dan Qu China National Digital Switching System Engineering & Technological R&D Center

ISBN: (纸本)9781510830028

Acoustic features chosen from the input utterances play crucial roles in speech separation. In this paper, we propose a novel complementary feature approach that performs speech separation by combining five promising features, including Gammatone filterbank power spectra(GF) and multi-resolution cochleagram(MrCG) proposed recently especially for speech separation, as a super-vector fed into deep neural network(dNN). Additionally, based on the complementary features, we do experiments with two dNN training strategies, which are restricted Boltzmann machine(rBM) pre-training and dropout combined with rectified Linear Units(re LU), to optimize the performance of dNN. The experiment results, obtained in IEEE and TIMIT corpora using four different noises at low SNr levels of 0d B and-5d B, indicate that complementary features and rBM model improve all evaluation metrics. By contrast, dropout combined with re LU system specializes in noise suppression and objective intelligibility more.

关键词： speech separation dNN complementary features rBM pre-training dropout

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Improved Propagator Method for Joint Angle and doppler Estimation Based on Structured Least Squares

Improved Propagator Method for Joint Angle and Doppler Estim...

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2016 8th IEEE International Conference on Communication Software and Networks(ICCSN 2016)

作者： Likai Guo Ying Wu China National Digital Switching System Engineering & Technological R&D Center

A new propagator method for joint angle and doppler estimation based on structured least squares(SLS)is *** defining a new propagator matrix the proposed approach reduces the loss of array *** addition,SLS which will take the specific relationship between two parts of the equation into account is utilized to enhance the estimation performance when solving the rotational invariance matrix *** results are provided verifying the effectiveness of the proposed method.

关键词： array singnal processing joint angle and doppler estimation Structured Least Squares(SLS)

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5G ENTErING INTO A NEW ErA

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China Communications 2017年第12期14卷 I0002-I0004页

作者： Feifei Gao Changle Li Jun Fang Kaizhi Huang Zhi Quan Chengwen Xing Jianhua Zhang Zhongshan Zhang Liqiang Zhao Yulong Zou Department of Automation Tsinqhua UniversityBeiiingChina the State Key Laboratory of Integrated Services Networks Xidian University china communications ieee communications magazine ieee signal processing letters national digital switching system engineering&technological research center the college of information engineering shenzhen university the school of information and electronics beijing institute of technology bupt itu-r imt-2020 channel model ieee comm the school of computer and communication engineering in the university of science and technology beijing(ustb) state key lab.of integrated ser vice networks xidian university the nanjing university of posts and telecommunications(nupt)

The ever increasing wireless data services, such asimaging, video, audio, multimedia, etc., have de-mands for the very high speed wireless communicationsand network, which are unfortunately a bottleneck whencombining with the wireline core network. Users＇ arenow expecting high quality of experience with low-costdevices, ubiquitous connectivity, energy efficiency, highreliability, or even ultra-low latency if a vehicle terminalis applied.

关键词： 5G ENTErING A NEW ErA

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Corrigendum to: The TianQin project: current progress on science and technology

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Progress of Theoretical and Experimental Physics 2021年第5期2021卷

作者： Mei, Jianwei Bai, Yan-Zheng Bao, Jiahui Barausse, Enrico Cai, Lin Canuto, Enrico Cao, Bin Chen, Wei-Ming Chen, Yu ding, Yan-Wei duan, Hui-Zong Fan, Huimin Feng, Wen-Fan Fu, Honglin Gao, Qing Gao, TianQuan Gong, Yungui Gou, Xingyu Gu, Chao-Zheng Gu, de-Feng He, Zi-Qi Hendry, Martin Hong, Wei Hu, Xin-Chun Hu, Yi-Ming Hu, Yuexin Huang, Shun-Jia Huang, Xiang-Qing Jiang, Qinghua Jiang, Yuan-Ze Jiang, Yun Jiang, Zhen Jin, Hong-Ming Korol, Valeriya Li, Hong-Yin Li, Ming Li, Pengcheng Li, rongwang Li, Yuqiang Li, Zhu Li, Zhulian Li, Zhu-Xi Liang, Yu-rong Liang, Zheng-Cheng Liao, Fang-Jie Liu, Qi Liu, Shuai Liu, Yan-Chong Liu, Li Liu, Pei-Bo Liu, Xuhui Liu, Yuan Lu, Xiong-Fei Lu, Yang Lu, Ze-Huang Luo, Yan Luo, Zhi-Cai Milyukov, Vadim Ming, Min Pi, Xiaoyu Qin, Chenggang Qu, Shao-Bo Sesana, Alberto Shao, Chenggang Shi, Changfu Su, Wei Tan, ding-Yin Tan, Yujie Tan, Zhuangbin Tu, Liang-Cheng Wang, Bin Wang, Cheng-rui Wang, Fengbin Wang, Guan-Fang Wang, Haitian Wang, Jian Wang, Lijiao Wang, Panpan Wang, Xudong Wang, Yan Wang, Yi-Fan Wei, ran Wu, Shu-Chao Xiao, Chun-Yu Xu, Xiao-Shi Xue, Chao Yang, Fang-Chao Yang, Liang Yang, Ming-Lin Yang, Shan-Qing Ye, Bobing Yeh, Hsien-Chi Yu, Shenghua Zhai, dongsheng Zhang, Caishi Zhang, Haitao Zhang, Jian-dong Zhang, Jie Zhang, Lihua Zhang, Xin Zhang, Xuefeng Zhou, Hao Zhou, Ming-Yue Zhou, Ze-Bing Zhu, dong-dong Zi, Tie-Guang Luo, Jun TianQin Research Center for Gravitational Physics & School of Physics and Astronomy Sun Yat-sen University (Zhuhai Campus) Zhuhai 519082 P.R. China Centre for Gravitational Experiments School of Physics MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics PGMF Huazhong University of Science and Technology Wuhan 430074 P.R. China SISSA Via Bonomea 265 34136 Trieste Italy and INFN Sezione di Trieste & IFPU – Institute for Fundamental Physics of the Universe Via Beirut 2 34014 Trieste Italy Former Faculty Politecnico di Torino Corso Duca degli Abruzzi 24 10129 Torino Italy Yunnan Observatories Chinese Academy of Sciences Kunming 650011 China School of Physical Science and Technology Southwest University Chongqing 400715 China Beijing Institute of Control Engineering Beijing 100094 P.R. China SUPA School of Physics and Astronomy University of Glasgow Glasgow G12 8QQ UK DFH Satellite Co. Ltd. Beijing 100094 P.R. China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China School of Astronomy and Space Science University of Chinese Academy of Sciences Beijing 100049 China School of Physics and Astronomy University of Birmingham Birmingham B15 2TT United Kingdom Center for High Energy Physics & Department of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University No. 5 Yiheyuan Rd Beijing 100871 P.R. China Lomonosov Moscow State University Sternberg Astronomical Institute Moscow 119992 Russia Dipartimento di Fisica “G. Occhialini” Universitá degli Studi Milano Bicocca Piazza della Scienza 3 I-20126 Milano Italy School of Aeronautics and Astronautics Shanghai Jiao Tong University Shanghai 200240 China Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210023 & School of Astronomy and Space Science University of Science and Technology of China Hefei Anhui 230026 P.R. China Max-Planck-Institut für Gravitationsphysik (Al

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Cooperation incentive mechanism for selfish users based on trust degree

Cooperation incentive mechanism for selfish users based on t...

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International Conference on Information Science and technology (ICIST)

作者： Wen Wang Kaizhi Huang Yi Zou China National Digital Switching System Engineering Technological R&D Center Zhengzhou

In multiuser networks, selfish users refuse to provide other users with their own energy and computing resources. In order to encourage selfish users to offer their resources, a cooperation incentive mechanism based on users trust degree evaluation is proposed. The mechanism helps relays to decide whether to participate in the cooperation or not by comparing trust value. Selfish users with lower trust value will be rejected on higher probability, while cooperation can improve trust value and their own communication security. Several experiments demonstrate the effectiveness of the proposed scheme in this paper. Selfish users actively participate in the cooperation comparing situations without encouragement. At the same time, the communication quality of the users is close to the cooperation with selfless relays.

关键词： decision support systems

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