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Pinning consensus analysis of multi-agent networks with arbitrary topology

Chinese Physics B 2013年第9期22卷 183-189页

作者：纪良浩廖晓峰陈欣 State Key Laboratory of Power Transmission Equipment & System Security and New Technology College of Computer ScienceChongqing University Chongqing key Laboratory of Computational Intelligence (Chongqing University of Posts and Telecommunications) School of Software Engineering Chongqing University

In this paper the pinning consensus of multi-agent networks with arbitrary topology is investigated. Based on the properties of M-matrix, some criteria of pinning consensus are established for the continuous multi-agent network and the results show that the pinning consensus of the dynamical system depends on the smallest real part of the eigenvalue of the matrix which is composed of the Laplacian matrix of the multi-agent network and the pinning control gains. Meanwhile, the relevant work for the discrete-time system is studied and the corresponding criterion is also obtained. Particularly, the fundamental problem of pinning consensus, that is, what kind of node should be pinned, is investigated and the positive answers to this question are presented. Finally, the correctness of our theoretical findings is demonstrated by some numerical simulated examples.

关键词： multi-agent pinning control consensus synchronization

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Numerical Simulation of Multicomponent Alloy Solidification

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Journal of Mechanics engineering and Automation 2014年第10期4卷 828-837页

作者： Vladimir Pavlovich Ginkin Svetlana Mikhailovna Ganina Andrey Valentinovich Kartavykh MA TEK (Mathematical Ecology) Ltd. Obninsk 249033 Russia Department of Mathematics and Software Institute for Physics and Power Engineering Obninsk 249033 Russia Department of Physical Chemistry National University of Science and Technology "MISIS" Moscow 119049 Russia Department of Functional and Constructional Nanomaterials Technological Institute for Superhard and Novel Carbon MaterialsMoscow 142190 Russia

A non-equilibrium model of multicomponent melt solidification has been developed in which a Stefan problem with two boundaries is solved numerically, the boundaries being between the solid phase and the two-phase transition zone and between the two-phase transition zone and the liquid phase. The two-phase zone is represented as a porous medium with variable porosity. The additional force resisting the melt flow due to porosity and introduced by analogy with Darcy＇s law is taken into account. Computer simulation has been performed of the experiment on Sn-20 wt.%Pb binary alloy solidification by the method of downward-directed crystallization along the gravity vector. The paper shows the results of a quasi two-dimensional benchmark experiment on horizontal （i.e., at the right angle to the gravity vector） directional solidification of a binary Sn-3 wt.%Pb alloy. The calculations were done using two crystallization models： the equilibrium model and the non-equilibrium one. It is shown that the non-equilibrium model gives a better description of the thermal field evolution and solute distribution caused by natural convection.

关键词： Solidification binary alloy mushy zone macrosegregation convection heat-mass transfer modelling comparison withexperimental results.

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Research of coordination algorithm for the wireless sensor and actor network

Research of coordination algorithm for the wireless sensor a...

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2013 5th International Conference on Computational and Information Sciences, ICCIS 2013

作者： Li, Han-Ju Yang, Jie Information Centre Guangdong Grid Co DongGuan Power Supply Bureau DongGuan China School of Software Engineering South China University of Technology Guangzhou China

ISBN: (纸本)9780769550046

Research of the wireless sensor and actor networks has confronted with many problems, such as the coordination of sensors and actors, the model for network colony, and so on. This paper discusses the coordination frame of wireless sensor and actor networks. In order to solve the coordination problem of sensors and actors, we propose an algorithm based on an event driven clustering paradigm, which can find out data aggregation trees from all the sensors that discover the events to the appropriate actors. In each cluster, the decision-making algorithm based on contract nets is also proposed. Finally, the simulation experiments are carried out for the proposed algorithm. © 2013 IEEE.

关键词： Wireless sensor networks

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A security protocol with minimum interference for UWB and WiFi networks

A security protocol with minimum interference for UWB and Wi...

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20th IEEE Symposium on Communications and Vehicular technology in the BeNeLux, IEEE SCVT 2013

作者： Huayi, Wu Zhidong, Shen Baohua, Bai School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing 100083 China International School of Software Wuhan University Wuhan 430079 China Communication and Power Utilization Technology Subcompany State Grid Electric Power Research Institute Beijing 102200 China

ISBN: (纸本)9781479932061

As one type of the attacks happening in MAC layer of wireless networks, a selfish behavior can degrade network performance significantly. In this paper, we studied a hybrid wireless network including UWB devices and WiFi devices together and analyze the characteristics of selfish behavior and the methods how to expose it. In order to improve the self-giving cooperation between the nodes in hybrid wireless networks and increase the fairness index of the whole networks, a security mechanism based on a puzzle model was proposed in this paper. The punishment mechanism was used both in a common control channel and a data channel. And then, we proposed an optimal algorithm to reduce the interference of networks. The results of stimulations show that the proposed protocol improves the self-giving cooperation between nodes in the networks and make the interference of the network minimum. © 2013 IEEE.

关键词： Wireless local area networks (WLAN)

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A power system distributed computing model based on SOA

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2012 International Conference on Information technology and software engineering, ITSE 2012

作者： Zhao, Ruifeng Yan, Wei Zhang, Jinge He, Fang State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University 400030 Chongqing China School of Software Engineering Chongqing University Chongqing China Ziyang Company of Sichuan Electric Power Company 641300 Ziyang China

ISBN: (纸本)9783642345302

Aiming at the problem of architectural inflexibility, high maintenance and integration costs of power system distributed computing model based on inter-process communication (PSDCM), a power system distributed computing model based on SOA (PSDCMSOA) is proposed. The characteristic of hierarchical multi-level management and multi-region control pattern and computing node model of power system computing system are analyzed, Ward equivalence method is studied to get equivalence grid of the adjacent power grid, data service is designed to achieve the integration of distributed heterogeneous data, remote communication service is researched to complete data exchange between local node, and then realized the PSDCMSOA. Simulation experiments show that PSDCMSOA can satisfy the requirement of simulating computing of power system effectively. © 2013 Springer-Verlag.

关键词： Electronic data interchange

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Abstracted Architecture for Smart Grid Privacy Analysis

Abstracted Architecture for Smart Grid Privacy Analysis

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IEEE International Conference on Social Computing (SocialCom)

作者： Jussi Laakkonen Salla Annala Pekka Jäppinen Software Engineering and Information Management laboratory Lappeenranta University of Technology Electricity Markets and Power Systems laboratory Lappeenranta University of Technology

ISBN: (纸本)9781479915194

Electricity companies have traditionally seen customers only as consumers but with the introduction of new metering technology the situation is about to change. As customer participation increases with the development of the Smart Grid environment, new concerns about privacy arise. In this article we introduce an architecture offering a clear, information-centered bird's-eye overview to the Smart Grid environment for privacy analysis purposes. To do this, we first seek out commonalities in the environment by dividing the topic into smaller elements in order to gain deeper understanding and to form abstract and functional models. From these we form a reference architecture representing a real-world situation. Our approach permits identification of the use of private information in the environment without implementation-dependent issues. We also present the privacy issues related to the architecture. The implementation strategies can vary, and we conclude with a discussion of the effects of the varying approaches.

关键词： Smart grids Privacy Electricity Abstracts Computer architecture Data privacy NIST

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Queue Reorganization for Subscription Congestion Avoidance in Publish/Subscribe Systems

Queue Reorganization for Subscription Congestion Avoidance i...

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IEEE International Performance Computing and Communication Conference

作者： Wei Yan Vinod Muthusamy Mingwen Chen Yonghong Huang Zheng Xiao Xubin Pei Songlin Hu State Key Laboratory of Software Engineering Wuhan University Wuhan China IBM Thomas J. Waston Research Center NY USA Institute of Computing Technology Chinese Academy of Sciences Beijing China State Grid Electricity Science Research Institute Beijing China Zhejiang Electric Power Corporation Hangzhou China

ISBN: (纸本)9781479932153

Content-based publish/subscribe systems allow subscribers to specify interests based on event contents, rather than pre-assigned event topics. Since most of existing publish/subscribe systems use FIFO (First In First Out) as its queue management mechanism, it may face network congestion coming from suddenly burst of huge amount of subscription messages as well as event notifications. To promote the ability to handle congestion challenge, we present a new queue management mechanism called queue reorganization algorithm. By taking advantage of similarities among concurrent subscriptions, queue reorganization algorithm can make covering subscriptions as proxies and remove unnecessary subscriptions at each broker, which in turn greatly reduces pressure from congested input queue. Detailed evaluations under various workloads show significant benefits of the optimizations in terms of input queue size and message routing cost.

关键词： Publish/Subscribe Systems Covering Queue Reorganization

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Analog fault diagnosis using hopfield network and multi-scale wavelet transform method

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Journal of Computational Information Systems 2012年第23期8卷 9721-9728页

作者： Li, Penghua Xiong, Qingyu Chai, Yi Wang, Kunpeng The State Key Laboratory of Power Transmission Equipment and System Security and New Technology College of Automation Chongqing University Chongqing 400044 China The School of Software Engineering Chongqing University Chongqing 400044 China

This paper provides a novel diagnosis technique using multi-scale wavelet transform and Hopfield neural network for soft fault diagnosis in analog electronic circuits. The proposed method extracts the original signals from the output terminals of the circuits under test (CUTs) by a data acquisition board. The actual signals and the ideal signals are decomposed with three layer using wavelet transform. The energy of corresponding wavelet coefficients are calculated as fault feature parameters. The features are encoded and then fed to the Hopfield neural network for fault classification. The numerical experiments about Sallen-Key bandpass filter verify the effectiveness of the proposed method. ©2012 by Binary Information Press.

关键词： Wavelet transforms

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Research on fractional order controller based on best rational approximation approach

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Journal of Convergence Information technology 2012年第4期7卷 50-58页

作者： Zhao, Huimin Nie, Bing Li, Wen Deng, Wu Software Institute Dalian Jiaotong University Dalian 116028 China Key Laboratory of Numerical Simulation in the Sichuan Provincial College Neijiang Normal University Neijiang 641112 China Artificial Intelligence Key Laboratory of Sichuan Province Sichuan University of Science and Engineering Zigong 643000 China State Key Laboratory of Power Transmission Equipment and System Security and New Technology College of Electrical Engineering Chongqing University Chongqing 400044 China Key Laboratory of advanced Design and Intelligent Computing Dalian University Ministry of Education Dalian 116622 China

Introduce the basic concept of best rational approximation and constructing procedure of the best rational approximation function in Laplace domain. By an illustrative example the design method of FOC based on best rational approximation is discussed. The performance comparison of transfer functions between the FOC obtained by best rational approximation method and conventional PID shows that it is effective to apply the method in design of FOC, which can guarantee maximum absolute error of amplitude frequency characteristic of approximation function in a given error tolerance.

关键词： Rational functions

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Formal modeling and verification of digital home RF protocol

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Journal of Computational Information Systems 2011年第7期7卷 2412-2419页

作者： Zheng, Hong Jiang, Yue Liu, Yun School of Information Science and Engineering East China University of Science and Technology Shanghai 200237 China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai 200235 China Training Center JiangXi Electric Power Company Nanchang 330032 China

Wireless radio frequency (RF) protocol of the digital home runs on control equipments, RF repeater and terminal equipments. RF protocol provides a quick, flexible, and reliable means to communicate, identify, track, and manage a variety of items. It has the potential to significantly alter how processes occur and how companies operate. The paper models and verifies RF Protocol by Petri nets which can ensure reliable execution of RF protocol in the digital home environment and analyze its dynamic properties. Copyright © 2011 Binary Information Press.

关键词： Petri nets

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