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Quaternion Approach to Solve Coupled Nonlinear Schrdinger Equation and Crosstalk of Quarter-Phase-Shift-Key Signals in Polarization Multiplexing Systems

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Chinese Physics Letters 2015年第8期32卷 78-82页

作者：刘岚岚吴重庆尚超王健高凯强 Institute of Optical Information and Key Lab of Education Ministry on Luminescence and Optical Information Technology School of Science Beijing Jiaotong University Belting 100044 State Key Laboratory of Information Photonics and Optical Communication School of Electronic Engineering Belting University of Posts and Telecommunications Beijing 100876

The quaternion approach to solve the coupled nonlinear Schrodinger equations （CNSEs） in fibers is proposed, converting the CNSEs to a single variable equation by using a conception of eigen-quaternion of coupled quater- nion. The crosstalk of quarter-phase-shift-key signals caused by fiber nonlinearity in polarization multiplexing systems with 100 Cbps bit-rate is investigated and simulated. The results demonstrate that the crosstalk is like a rotated ghosting of input constellation. For the 50 km conventional fiber link, when the total power is less than 4roW, the crosstalk effect can be neglected; when the power is larger than 20roW, the crosstalk is very obvious. In addition, the crosstalk can not be detected according to the output eye diagram and state of polarization in Poincare sphere in the trunk fiber, making it difficult for the monitoring of optical trunk link.

关键词： In dinger Equation and Crosstalk of Quarter-Phase-Shift-Key Signals in Polarization Multiplexing Systems Quaternion Approach to Solve Coupled Nonlinear Schr

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Ray Tracing Based Sub-6 GHz Wireless Channel Characteristics Analysis in Underground Garage Environments 4

Ray Tracing Based Sub-6 GHz Wireless Channel Characteristics...

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4th IEEE International Conference on Electronics and communication Engineering, ICECE 2021

作者： Li, Xiaole Zhang, Cuiping Sun, Jian Zhang, Wensheng Wang, Cheng-Xiang Shandong Provincial Key Lab of Wireless Communication Technologies School of Information Science and Engineering Shandong University Qingdao China Shandong Provincial Key Lab of Wireless Communication Technologies Shandong University Qingdao China Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information Technology Nanjing University of Aeronautics and Astronautics Nanjing China National Mobile Communications Research Laboratory School of Information Science and Engineering Southeast University Nanjing China Purple Mountain Laboratories Nanjing China

ISBN: (纸本)9781728194226

Indoor hot spots is a major deployment scenario of the fifth generation (5G) network. In the indoor scenario, the radio wave propagation characteristics of underground garages are still not fully understood. In addition, Sub-6 GHz band is the main frequency band used in domestic 5G networks recently. This paper mainly uses ray tracing to study the wireless channel characteristics in the scenario of underground garage under Sub-6 GHz frequency band. Firstly, a three-dimensional (3D) simulation scenario is built, and the channel simulation is carried out at 3.5 GHz frequency band. According to the simulation data, the results shows that the path loss index is smaller than that in the 3GPP indoor scenario. Then, the channel data of Sub-6 GHz continuous frequency band is simulated at 500 MHz interval, the influence of material properties on channel characteristics is studied. We find that the path loss increases while the distance between the transmitter (Tx) and receiver (Rx) increases, and the change is obvious at a long distance with increasing frequency. ©2021 IEEE

关键词： Ray tracing

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ENERGY EFFICIENT DISTRIBUTED STEGANOGRAPHY FOR SECURE communication IN WIRELESS MULTIMEDIA SENSOR NETWORKS

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Journal of Electronics(China) 2013年第1期30卷 9-16页

作者： Lin Qiaomin Wang Ruchuan Ye Ning Wang Zhongqin College of Computer Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Lab of Broadband Wireless Communication and Sensor Network Technology (Nanjing University of Posts and Telecommunications) Ministry of Education Department of Information Science Nanjing College for Population Management

A secure communication mechanism is necessary in the applications of Wireless Multimedia Sensor Networks (WMSNs), which is more vulnerable to security attacks due to the presence of multimedia data. Additionally, given the limited technological resources (in term of energy, computation, bandwidth, and storage) of sensor nodes, security and privacy policies have to be combined with energy-aware algorithms and distributed processing of multimedia contents in WMSNs. To solve these problems in this paper, an energy efficient distributed steganography scheme, which combines steganography technique with the concept of distributed computing, is proposed for secure communication in WMSNs. The simulation results show that the proposed method can achieve considerable energy efficiency while assuring the communication security simultaneously.

关键词： Discrete Wavelet Transform (DWT) Distributed steganography Energy efficiency Perfect hash Wireless Multimedia Sensor Networks (WMSNs)

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TSV protection: Towards secure 3D-MPSoC

TSV protection: Towards secure 3D-MPSoC

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IEEE Latin American Symposium on Circuits and Systems (LASCAS)

作者： Johanna Sepúlveda Guy Gogniat Daniel Flórez Jean-Philippe Diguet Ricardo Pires Marius Strum Lyon Institute of Nanotechnology INL Ecole Centrale de Lyon France Microelectronics Laboratory LME University of São Paulo Brazil Information and Communication Science and Technology Laboratory Lab-STICC Université Bretagne Sud France

Through-Silicon-Vias (TSVs) are the key enabling technology for high performance of three-dimension Multi-processor System-on-Chip (3D-MPSoC). Physical weaknesses of TSVs can be exploited by malicious software to attack the system. By means of the manipulation of the TSV communication an attacker is able to modify, spy and even denial the TSV communication. Extending just 2D security mechanisms to 3D-MPSoC without taking into account the 3D aspects will not protect the system. In this paper we propose 3D-SECTSV, a flexible and efficient security architecture based on a 3D-NoC communication structure able to protect the TSV data exchange of 3D-MPSoCs. We compare our approach with several 3D-protection proposals, including the simple extension of 2D security countermeasures. We show that our solution outperforms other approaches with respect to attack detection while decreasing cost and performance impact on the system.

关键词： Security Through-silicon vias Three-dimensional displays Computer architecture Crosstalk Routing System-on-chip

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Generative adversarial network-based channel modeling for free-space optical communication 26

Generative adversarial network-based channel modeling for fr...

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26th Optoelectronics and communications Conference, OECC 2021

作者： Chen, Wenbin Wang, Danshi Wang, Dongdong Song, Yuchen Li, Jin Zhang, Min State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications China Science and Technology on Communication Networks Laboratory Shijiazhuang China The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang China Purple Mountain Lab Nanjing211111 China

Two deep learning-based differentiable models based on GAN and BiLSTM are proposed for FSO channel modeling. Through contrastive analysis, it shows that GAN is more suitable for learning FSO channel distribution with ... 详细信息

ISBN: (纸本)9781557528209

关键词： Generative adversarial networks

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The Strength of Structural Diversity in Online Social Networks

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Research 2021年第1期2021卷 1203-1212页

作者： Yafei Zhang Lin Wang Jonathan JHZhu Xiaofan Wang Alex‘Sandy’Pentland Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information ProcessingMinistry of Education of ChinaShanghai 200240China Department of Media and Communication and School of Data Science City University of Hong KongHong Kong S.A.R.China Department of Automation Shanghai UniversityShanghai 200444China Media Lab Massachusetts Institute of TechnologyCambridgeMA 02139USA

Understanding the way individuals are interconnected in social networks is of prime significance to predict their collective *** a large-scale dataset from a knowledge-sharing website,this paper presents an exploratory investigation of the way to depict structural diversity in directed networks and how it can be utilized to predict one’s online social *** capture the structural diversity of an individual,we first consider the number of weakly and strongly connected components in one’s contact neighborhood and further take the coexposure network of social neighbors into *** show empirical evidence that the structural diversity of an individual is able to provide valuable insights to predict personal online social reputation,and the inclusion of a coexposure network provides an additional ingredient to achieve that *** synthetically controlling several possible confounding factors through matching experiments,structural diversity still plays a nonnegligible role in the prediction of personal online social *** work constitutes one of the first attempts to empirically study structural diversity in directed networks and has practical implications for a range of domains,such as social influence and collective intelligence studies.

关键词： collective networks founding

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Signal Tensor Model and Eigenvalue Distributions for THz Uplink UM-MIMO communications 15

Signal Tensor Model and Eigenvalue Distributions for THz Upl...

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15th IEEE International Conference on Wireless communications and Signal Processing, WCSP 2023

作者： Qi, Bin Zhang, Wensheng Li, Qiang Sun, Jian Liu, Zhi Wang, Chen Wang, Cheng-Xiang Shandong University Shandong Provincial Key Lab of Wireless Communication Technologies School of Information Science and Engineering Qingdao266237 China Huazhong University of Science and Technology School of Electronic Information and Communications Wuhan430074 China Southeast University National Mobile Communications Research Laboratory School of Information Science and Engineering Nanjing210096 China Purple Mountain Laboratories Nanjing211111 China

ISBN: (纸本)9798350324662

Tensor theory has been widely used in the research field of wireless communications. Tensor eigenvalues are usually considered key parameters of tensors. However, the exact physical or practical meanings of tensor eigenvalues in wireless communications are still unknown. In this paper, we investigate the distributions of tensor eigenvalues for Terahertz (THz) ultra-massive multiple-input multiple-output (UM-MIMO) orthogonal frequency division multiplexing (OFDM) systems, in which the channel modeling problem using hybrid beamforming (HBF) is studied, aiming to study the properties of tensor eigenvalues in communication systems. The OFDM pilot is sent by the mobile station (MS) through a precoder with random phases. The received signal at the base station (BS) can be reassembled into a fifth-order tensor that follows CANDECOMP/PARAFAC decomposition (CPD) to represent channel information. The homotopy method is used to calculate all eigenvalues of signal tensors efficiently and accurately. The numerical results show that the non-zero eigenvalues of received signal tensors are distributed sparsely, and the eigenvalue of each tensor is a unique value. © 2023 IEEE.

关键词： CP decomposition Homotopy method Tensor eigenvalue Terahertz communications UM-MIMO

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2D material-based optical sensors: a review

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ISSS Journal of Micro and Smart Systems 2022年第1期11卷 169-177页

作者： Subbanna, B. Bala Choudhary, Kuldeep Singh, Sonika Kumar, Santosh Advance Research Lab Department of Electrical and Electronics and Communication Engineering DIT University Dehradun India Shandong Key Laboratory of Optical Communication Science and Technology School of Physics Science and Information Technology Liaocheng University Liaocheng China

The purpose of this review article is to highlight the advanced applications of two-dimensional (2D) materials, with their significance in the development of optical sensors (OSs), with sensing substances, sensing mechanisms, and new sensing mechanism recommendations. Recently, 2D materials have gained considerable interest due to their promise of superior electronic properties, attractive quantum physics, and high photo-response. Numerous studies have been conducted on the exceptional physical/chemical properties and applications of 2D materials. Transition metal dichalcogenides (TMDs) play a critical role in the next generation of sensing applications due to their low toxicity, inherent layered van der Waals structure, and unmistakable structure that may be designed. A combination of structural, electrical, and optical properties of 2D TMDs is used to fabricate high-performance optical sensors.

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Data augmentation in microscopic images for material data mining

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npj Computational Materials 2020年第1期6卷 601-609页

作者： Boyuan Ma Xiaoyan Wei Chuni Liu Xiaojuan Ban Haiyou Huang Hao Wang Weihua Xue Stephen Wu Mingfei Gao Qing Shen Michele Mukeshimana Adnan Omer Abuassba Haokai Shen Yanjing Su Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Knowledge Engineering for Materials Science Beijing 100083China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Technology Liaoning Technical UniversityLiaoning 114051China The Institute of Statistical Mathematics Research Organization of Information and SystemsTachikawaTokyo 190-8562Japan National Intellectual Property Administration Beijing 100088China Faculty of Engineering Sciences University of BurundiBujumburaBurundi Faculty of Engineering and Technology Palestine Technical University–KadoorieTulkaremPalestine College of Information Science and Engineering China University of PetroleumBeijingChina Key Lab of Petroleum Data Mining China University of PetroleumBeijingChina

Recent progress in material data mining has been driven by high-capacity models trained on large ***,collecting experimental data(real data)has been extremely costly owing to the amount of human effort and expertise ***,we develop a novel transfer learning strategy to address problems of small or insufficient *** strategy realizes the fusion of real and simulated data and the augmentation of training data in a data mining *** a specific task of grain instance image segmentation,this strategy aims to generate synthetic data by fusing the images obtained from simulating the physical mechanism of grain formation and the“image style”information in real *** results show that the model trained with the acquired synthetic data and only 35%of the real data can already achieve competitive segmentation performance of a model trained on all of the real *** the time required to perform grain simulation and to generate synthetic data are almost negligible as compared to the effort for obtaining real data,our proposed strategy is able to exploit the strong prediction power of deep learning without significantly increasing the experimental burden of training data preparation.

关键词： mining instance competitive

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Characterizing Kerr Optical Frequency Combs Using Quantum Interference

Characterizing Kerr Optical Frequency Combs Using Quantum In...

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2023 Asia communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Guo, Jin Fan, Yun-Ru Geng, Yong Deng, Guang-Wei Song, Hai-Zhi Wang, You You, Li-Xing Wang, Zhen Zhou, Heng Qiu, Kun Guo, Guang-Can Zhou, Qiang University of Electronic Science and Technology of China Key Lab of Optical Fiber Sensing and Communication Networks Chengdu China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Southwest Institute of Technical Physics Chengdu China Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu China University of Science and Technology of China Cas Key Laboratory of Quantum Information Hefei China

For the first time, we characterize the properties of Kerr optical frequency combs using quantum optics. The temporal FWHM of single soliton state is obtained as l109.8pm 6.5 fs within the Fourier transform limit. ... 详细信息

ISBN: (纸本)9798350312614

关键词： HOM interferometer Kerr optical frequency combs quantum interference

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