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Joint alignment and steering to manage interference

Digital Communications and Networks 2024年第2期10卷 429-438页

作者： Zhao Li Xiujuan Liang Yinghou Liu Jia Liu zheng Yan School of Cyber Engineering Xidian UniversityXi'an710126China Technol.on Commun.Net.Lab. The 54th Research Inst.of China Elec.Technol.Group Corp.Shijiazhuang050081China School of computer science and technology Xidian UniversityXi'an710126China The department of Communications and Networking(Comnet) Aalto University02150EspooFinland

In wireless communication networks,mobile users in overlapping areas may experience severe interference,therefore,designing effective Interference Management(IM)methods is crucial to improving network ***,when managing multiple disturbances from the same source,it may not be feasible to use existing IM methods such as Interference Alignment(IA)and Interference Steering(IS)*** is because with IA,the aligned interference becomes indistinguishable at its desired Receiver(Rx)under the cost constraint of Degrees-of-Freedom(DoF),while with IS,more transmit power will be consumed in the direct and repeated application of IS to each *** remedy these deficiencies,Interference Alignment Steering(IAS)is proposed by incorporating IA and IS and exploiting their advantages in *** IAS,the interfering Transmitter(Tx)first aligns one interference incurred by the transmission of one data stream to a one-dimensional subspace orthogonal to the desired transmission at the interfered Rx,and then the remaining interferences are treated as a whole and steered to the same subspace as the aligned ***,two improved versions of IAS,i.e.,IAS with Full Adjustment at the Interfering Tx(IAS-FAIT)and Interference Steering and Alignment(ISA),are *** former considers the influence of IA on the interfering user-pair's *** orthogonality between the desired signals at the interfered Rx can be maintained by adjusting the spatial characteristics of all interferences and the aligned interference components,thus ensuring the Spectral Efficiency(SE)of the interfering communication *** ISA,the power cost for IS at the interfered Tx is minimized,hence improving SE performance of the interfered *** the proposed methods are realized at the interfering and interfered Txs cooperatively,the expenses of IM are shared by both *** in-depth simulation results show that joint use of IA and

关键词： Interference Interference management Interference alignment Interference steering Spectral efficiency

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FedQMIX:Communication-efficient federated learning via multi-agent reinforcement learning

High-Confidence Computing

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High-Confidence Computing 2024年第2期4卷 96-104页

作者： Shaohua Cao Hanqing Zhang Tian Wen Hongwei Zhao Quancheng zheng Weishan Zhang Danyang zheng Qingdao Institute of Software College of Computer Science and TechnologyChina University of Petroleum(East China)Qingdao 266580China School of Computing and Artificial Intelligence Xipu CampusSouthwest Jiaotong UniversityChengdu 611756China

Since the data samples on client devices are usually non-independent and non-identically distributed(non-IID),this will challenge the convergence of federated learning(FL)and reduce communication *** paper proposes FedQMIX,a node selection algorithm based on multi-agent reinforcement learning(MARL),to address these ***,we observe a connection between model weights and data distribution,and a clustering algorithm can group clients with similar data distribution into the same ***,we propose a QMIX-based mechanism that learns to select devices from clustering results in each communication round to maximize the reward,penalizing the use of more communication rounds and thereby improving the communication efficiency of ***,experiments show that FedQMIX can reduce the number of communication rounds by 11%and 3.%on the MNIST and CIFAR-10 datasets,respectively,compared to the baseline algorithm(Favor).

关键词： Communication efficient Federated learning MARL

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A NEW UEP SCHEME FOR ROBUST VIDEO TRANSMISSION IN LDPC CODED MIMO-OFDM SYSTEM

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Journal of Electronics(china) 2007年第3期24卷 396-401页

作者： Ru Congchong zheng Haifeng Yin Liuguo Lu Jianhua Chen Changwen department of Electronic Engineering Tsinghua University Beijing 100084 China College of Information technology Fuzhou University Fuzhou 350002 China Dept. Electrical ＆ computer Eng. Florida Institute of Technology Melbourne FL 32040 USA

In order to improve the video transmission performance in Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing （MIMO-OFDM） system, a new scheme, which integrates Multiple Description Coding （MDC）, Low Density Parity Check （LDPC） coding and hybrid space time coding, is proposed in this letter. In particular, a hybrid space time coding algorithm is combined with LDPC codes to perform Unequal Error Protection （UEP） of MDC encoded video streams. Comparing with the UEP transmission with only LDPC codes, the proposed scheme achieves more than ldB gain in terms of Signal to Noise Ratio （SNR） when the Peak Signal to Noise Ratio （PSNR） of reconstructed video is above 3.dB.

关键词： Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) Multiple Description Coding (MDC) Low Density Parity Check (LDPC) Unequal Error Protection (UEP)

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ANALYSIS OF BACKSCATTERING FROM WING AND FUSELAGE JOINTS

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Chinese Journal of Aeronautics 1993年第3期 205-210页

作者： Ruan Ying-zheng,Tian Jun (university of Electronic science and {3. of china, Chendu,china,610054)

The dihedral reflector with wing and fuselage joint is a very strong electromagneticscattering source in a wide angular region. The prediction of the electromagnetic scatteringand radar cross section from this construction, however, is a complicated theoretical problem,because one of the dihedral surfaces is curved. In this paper, the problem is analysedand calculated by the method of complex ray expansion combined with geometrical theoryof diffraction, dealing with the specular multi-reflections and the edge diffractionsrespectively. The influence of the geometrical parameters of the construction, such as theangle between wing and fuselage and the radius of airframe, on the radar cross section oftarget is evaluated numerically. The obtained results show that the presented method is aneffective approach to the radar cross section prediction, and the scattering contributionfrom the wing-fuselage dihedral can be reduced substantially by the computeroptimization of geometrical construction.

关键词： RCS ANALYSIS OF BACKSCATTERING FROM WING AND FUSELAGE JOINTS

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Model Reference Adaptive Control based on Neural Network for Electrode System in Electric Arc Furnace

Model Reference Adaptive Control based on Neural Network for...

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CES/IEEE 5th International Power Electronics and Motion Control Conference

作者： ZHANG Shi-feng ZHANG Shao-de LI Kun zheng Xiao School of Electrical Engineering& Information Anhui university of technology School of {3. science Anhui university of technology Ma’anshan Anhui china School of Electrical Engineering& Information Anhui University of Science and Technology China School of computer science Anhui University of Science and Technology Maanshan Anhui China

ISBN: (纸本)1424404487;9781424404483

＜正＞Control strategy of Model Reference Adaptive Control （MRAC） based on Radial Basis Function Neural Network（RBFNN） online identification is proposed, and a controller is also designed. Which in accordance with the characteristics of the electrode system in electric arc furnace as the high nonlinearity, time-variant, uncertainty and multivariable input and output coupling, The validity of control strategy is verified by result of experimentation.

关键词： electric arc furnace electrode control RBF neural network online identification adaptive decouple controller

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Structural Indexing for 3. Solid Digital Library

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Wuhan university Journal of Natural sciences 2001年第Z1期6卷 438-442页

作者： Han Shui\|hua, Lu zheng\|ding, Chen Chuan\|bo department of computer Engineering, Huazhong {3. of science and Teclonogy, Wuhan 43.074,Chian department of computer Engineering Huazhong University of Science and Teclonogy Wuhan Chian

In a very large digital library that support computer aided collaborative design, an indexing process is crucial whenever the retrieval process has to select among many possible designs. In this paper, we address the problem of retrieving important design and engineering information by structural indexing. A design is represented by a model dependency graph, therefor, the indexing problem is to determine whether a graph is present or absent in a database of model dependency graphs. we present a novel graph indexing method using polynomial characterization of a model dependency graph and on hashing. Such an approach is able to create an high efficient 3. solid digital library for retrieving and extracting solid geometric model and engineering information.

关键词： digital library computer aided design model dependency graphs hashing indexing

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An improved Ant Colony Optimization for Large-Scale Simple Assembly Line Balancing Problem of Type-1

An improved Ant Colony Optimization for Large-Scale Simple A...

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2012年先进制造技术与系统国际会议

作者： Qiaoxian zheng~(1,2,3.,Yuanxiang Li~2,Ming Li~(3.b) and Qiuhua Tang~4 1 computer College,Wuhan university,Wuhan,43.072,{3. 2 Mathematic and computer science College,Hubei university,Wuhan,43.062,{3. 3.science College,Wuhan university of science and technology,Wuhan,43.065,{3. 4 College of Mechanics and Automation,Wuhan university of science and technology,Wuhan, 43.065,{3.

An improvement ant colony optimization(ACO) is proposed to solve the simple assembly line balancing problem of type-1(SALBP-1) which aims to minimize the number of workstations for a given cycle time of assembly *** the algorithm,three heuristic factors and two pheromones:(1) the pheromone between task and station,(2) the pheromone among tasks,are introduced to design the selection mechanism which is used to select task for *** task assignment mechanism is proposed to assign suitable tasks to *** select task based on selection mechanism,and then assign suitable one to station according to assignment *** result of literature test problems indicates the effectiveness of the proposed algorithm.

关键词： Ant colony optimization Assembly line balancing Pheromone.

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A Design of Controller for a Class of Networked Control Systems

A Design of Controller for a Class of Networked Control Syst...

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第二十四届中国控制会议

作者： Xiaomei Zhang~(1,2), Yufan zheng~(3.2), Jianqiang Xu~(4,2) and Guoping Lu~5 (1. School of science, Nantong university, Nantong, 226007,{3.) (2. department of computer science and technology, East{3. Normal university, Shanghai 200062,{3.) (3. department of Electrical and Electronics Engineering, The university of Melbourne, Victoria 3.10, Australia) (4. department of Mathematics and Physics Teaching, Shanghai Institute of technology, Shanghai 20023.,{3.) (5. School of Electronic Engineering, Nantong university, Nantong, 226007,{3.)

＜正＞ This paper deals with the controller design of a networked control system with the presence of network-induced delay and transmitted data dropout. In view of data loss and network-induced delay, the networked control system is modelled as a stochastic switching discrete-time linear system with delay. By means of Lyapunov method, a novel delaydependent condition for the stability of the networked control system is given. Based on this condition, the desired controller is constructed through solving a set of linear matrix inequalities. An example is presented to illustrate the effectiveness of the proposed method.

关键词： networked control systems network-induced delay data dropout Lyapunov method linear matrix inequalities

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基于小波分析的时间序列数据挖掘模型

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计算机工程与应用 2004年第30期40卷 26-28页

作者：郑诚蔡庆生安徽大学计算机科学与技术学院中国科学技术大学计算机科学与技术系合肥230027

论文提出一个基于小波分析的时间序列挖掘模型TSMiner,它支持时间序列数据挖掘的整个过程。该模型由5部分组成:原始数据的可视化、数据预处理、数据约简,模式发现和结果模式可视化。该模型应用小波实现数据的多层次可视化表示、数据约... 详细信息

论文提出一个基于小波分析的时间序列挖掘模型TSMiner,它支持时间序列数据挖掘的整个过程。该模型由5部分组成:原始数据的可视化、数据预处理、数据约简,模式发现和结果模式可视化。该模型应用小波实现数据的多层次可视化表示、数据约简和多尺度模式发现。它可以帮助用户观察高维数据,理解中间结果和解释发现的模式。

关键词：时问序列数据挖掘可视化小波分析

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Variational quantum algorithms for scanning the complex spectrum of non-Hermitian systems

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Frontiers of physics 2024年第4期19卷 275-285页

作者： Xu-Dan Xie zheng-Yuan Xue Dan-Bo Zhang Key Laboratory of Atomic and Subatomic Structure and Quantum Control(Ministry of Education) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matterand School of PhysicsSouth China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials Guangdong–Hong Kong Joint Laboratory of Quantum Matterand Frontier Research Institute for PhysicsSouth China Normal UniversityGuangzhou 510006China

Solving non-Hermitian quantum many-body systems on a quantum computer by minimizing the variational energy is challenging as the energy can be ***,we propose a variational quantum algorithm for solving the non-Hermitian Hamiltonian by minimizing a type of energy variance,where zero variance can naturally determine the eigenvalues and the associated left and right ***,the energy is set as a parameter in the cost function and can be tuned to scan the whole spectrum efficiently by using a two-step optimization *** numerical simulations,we demonstrate the algorithm for preparing the left and right eigenstates,verifying the biorthogonal relations,as well as evaluating the *** also investigate the impact of quantum noise on our algorithm and show that its performance can be largely improved using error mitigation ***,our work suggests an avenue for solving non-Hermitian quantum many-body systems with variational quantum algorithms on near-term noisy quantum computers.

关键词： quantum algorithm non-Hermitian physics quantum manybody systems

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