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Distributed Leader-following Swarm of Heterogeneous Multi-agent systems *

IFAC Proceedings Volumes 2013年第13期46卷 13-18页

作者： Haili Liang Housheng Su Xiaofan Wang Michael Z.Q. Chen Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 China School of Automation Image Processing and Intelligent Control Key Laboratory of Education Ministry of China Huazhong University of Science and Technology Luoyu Road 1037 Wuhan 430074 China Department of Mechanical Engineering The University of Hong Kong Hong Kong

This paper investigates distributed leader-following swarm of heterogeneous multi-agent systems. Comparing with the existing works on leader-following swarm of homogeneous multi-agent systems, this paper is much more approaching the practical situation because the agents have different dynamics. We show that the heterogeneous followers will gather with a certain error lever under some assumptions and conditions. The stability properties have been proven by theoretical analysis and verified via numerical simulation. The stability of the heterogeneous multi-agent systems has been achieved based on matrix theory and the Lyapunov stability theorem. Numerical simulation is given to demonstrate the effectiveness of the theoretical result.

关键词： Swarm Multi-agent systems Heterogeneous systems Distributed control

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An expressive decentralizing KP-ABE scheme with constant-size ciphertext

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International Journal of Network Security 2013年第3期15卷 131-140页

作者： Li, Qinyi Xiong, Hu Zhang, Fengli Zeng, Shengke School of Computer Science and Engineering University of Electronic Science and Technology of China No.2006 Xiyuan Avenue West Hi-tech Zone Chengdu 611731 China State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing 100080 China

Decentralizing attribute based encryption is a variant of multi-authority attribute based encryption which doesn't require a trusted central authority to conduct the system setup. In this paper, we propose an expressive decentralizing KP-ABE scheme with constant ciphertext size. In our construction, the access policy can be expressed as any non-monotone access structure. Meanwhile, the ciphertext size is independent on the number of attributes used in the scheme. We prove that our scheme is semantic secure in so-called Selective-Set model based on the n-DBDHE assumption. To the best of our knowledge, this is the first multi-authority attribute based encryption scheme realizing such expressive access policy and constant ciphertext size.

关键词： Semantics

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Hierarchical Sparse Representation with Adaptive Dictionaries for Image Super-Resolution

Hierarchical Sparse Representation with Adaptive Dictionarie...

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International Congress on Image and Signal Processing

作者： Xuelian Wu Daiguo Deng Jianhong Li Xiaonan Luo Kun Zeng National Engineering Research Center of Digital Life State-Province Joint Laboratory of Digital Home Interactive Applications School of Information Science & Technology Sun Yat-sen University Shenzhen Digital Home Key Technology Engineering Laboratory School of Software Sun Yat-sen University Guangzhou China

ISBN: (纸本)9781479927654

This paper presents an image hierarchical super-resolution (SR) method with adaptive dictionaries, based on signal sparse representation. It can not only improve image detail quality but also reduce computational cost. Research on the human visual system suggests that our eyes are mainly sensitive to high-frequency contents. Inspired by this observation, we implemented a hierarchical process where an image was decomposed into a detail layer and a base layer. The detail layer is reconstructed through an over-complete dictionary while the base layer is interpolated by bi-cubic. Through these, we can keep the HR details better. Next is how to accelerate while keeping good quality. In our method, adaptive dictionaries are trained by feature clustering. Firstly, we train low dimension sub-dictionaries to reduce time complexity. Secondly, then we apply overlapping feature clustering to the training. Thus dictionaries can be adaptive and more complete. All these can also prevent sub-dictionaries with over strong independence but less compatibility. Besides, initializing the sparse coefficients also plays an important role in our acceleration. Experimental results validate that ours are competitive or even superior in quality than those produced by other methods and our test data indicates substantial reduction in processing time over other similar SR methods.

关键词： feature clustering super-resolution Adaptive dictionary

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Experimental Study of Marine Magnetotelluric in Southern Huanghai

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Chinese Journal of Geophysics 2013年第2期52卷 440-450页

作者： Wen-Bo WEI Ming DENG Zhen-He WEN Zi-Li ZHANG Gao-Feng YE Sheng JIN Qi-Sheng ZHANG Jian-En JING Meng WANG Kai CHEN Key Laboratory of Geo-detection of Ministry of Education and State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China School of Geophysics and Information Technology China University of Geosciences Beijing 100083 China Qingdao Institute of Marine Geology China Geology Survey Qingdao 266071 China School of Material Science and Engineering China University of Geosciences Beijing 100083 China

In the southern Huanghai (Yellow Sea), seismic exploration for oil and gas in pre-Tertiary strata encounters some difficulties, such as poor geological conditions at depth, screened seismic waves, and serious attenuation of seismic energy, so that the reflective signals from the Mesozoic and Paleozoic systems cannot be recognized. To solve this issue by other approach, an experiment of seafloor magnetotelluric (MT) sounding was carried out in this region in May 2006. This work has deployed 3 measurement sites on the Wulian slope and Jiaozhou sag in the basin and obtained good data. In this article, we present the difference of data processing between the marine MT and routine MT soundings, and analyze the influence of marine electromagnetic noise on the MT observation on seafloor. We propose correction methods for the horizontal attitude and orientation of the instrument as well as removal of marine noise. Using these and other regular methods, we have performed data processing and inversion, and a comprehensive analysis of geology and physical properties. The result shows that there are residual Paleozoic strata below the seafloor in the southern Huanghai. This is of great significance for prospect assessment of oil and gas in the pre-Tertiary system in this region. The experiment also demonstrates that the marine MT technology can play an important role in exploration of relict basins of Paleozoic time.

关键词： Southern Huanghai Marine MT Oil-gas resource Mesozoic-Paleozoic Marine electromagnetic noise correction

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Multiple Anti-windup Loops under Multiple Activations:Dynamic Case to Enlarge Domain of Attraction

Multiple Anti-windup Loops under Multiple Activations:Dynami...

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第三十二届中国控制会议

作者： Xiongjun Wu Ziyang Meng The 802 Institute of Shanghai Academy of Space Flight Technology The Eighth Academy of China Aerospace Science and Technology Corporation Department of Automation Shanghai Jiao Tong Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education of China ACCESS Linnaeus Centre School of Electrical EngineeringRoyal Institute of Technology

ISBN: (纸本)9781479900305

A multiple anti-windup loops under multiple dynamic activations strategy is proposed to enlarge the domain of attraction. This work is parallel to the multiple activation case with static *** traditional anti-windup compensator is activated immediately as the saturation *** was shown recently that,by delaying the activation of the anti-windup mechanism to a certain level,the performance can be improved for the closed-loop *** was further shown that better performance can be obtained by activating an anti-windup mechanism in anticipation of actuator saturation,in comparison with the delayed activation *** paper considers the anti-windup design problem of enlarging domain of attraction under a dynamic multiple activation *** this multiple activation scheme,the anticipatory,delayed and immediate activation mechanism is incorporated in the same framework simultaneously.A furthermore significant performance improvements over both the immediate and delayed activation schemes can be *** proposed dynamic multiple activation scheme established a unified anti-windup framework and can be readily extended to the traditional immediate,delayed and anticipatory activation anti-windup mechanisms.

关键词： Anti-windup dynamic compensator domain of attraction multiple activations

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Securely isolating malicious OS kernel modules using hardware virtualization support

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Journal of Computational information systems 2013年第13期9卷 5403-5410页

作者： Chen, Zhixian Cui, Jun Liu, Wei Xu, Bin School of Computer Science and Information Engineering Zhejiang Gongshang University Hangzhou 310018 China No. 28 Research Institute China Electronic Technology Group Corporation Nanjing 210007 China State Key Laboratory for Novel Software Nanjing University Nanjing 210093 China

Kernel-level attacks or rootkits that compromise the security of an operating system are one of the most important concerns in system security at present. By enforcing data-flow integrity or control-flow integrity of an operating system, a variety of solutions have been proposed to defend against these attacks. However, the added overhead likely makes those approaches unsuitable for many real-world applications. In this paper, we present SecEye, a lightweight hypervisor for protecting kernel integrity via securely isolating malicious dynamically loadable kernel modules, using hardware virtualization support. A primitive prototype is then implemented on Linux as a kernel module, which can detect kernel-level rootkits or attacks as well as avoid being tampered by malicious code. Experiment results show the effectiveness and feasibility of SecEye and tolerable overhead imposed. © 2013 by Binary information Press.

关键词： Virtual reality

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Erratum:An approach for determining equivalent circuit model of on-chip inductors

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Microwave and Optical technology Letters 2013年第1期56卷

作者： Na Yan Chen Yang Jianjun Gao ASIC & System State Key Laboratory Fudan University Shanghai 201203 China Shanghai Institute of Microsystem and Information Technology State Key Laboratory of Transducer Technology Shanghai China School of Information Science and Technology East China Normal University Shanghai 200062 People's Republic of China

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Decentralized Cooperation Strategies in Two-Dimensional Traffic of Cellular Automata

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Communications in Theoretical Physics 2012年第12期58卷 883-890页

作者：方峻覃征陈喜群冷彪徐朝晖江子能 Department of Computer Science and Technology Tsinghua University Key Laboratory for Information System Security Ministry of Education Department of Civil Engineering Tsinghua University School of Computer Science & Engineering Beihang University School of Software Tsinghua University

We study the two-dimensional traffic of cellular automata using computer simulation. We propose two type of decentralized cooperation strategies, which are called stepping aside (CS-SA) and choosing alternative routes (CS-CAR) respectively. We introduce them into an existing two-dimensional cellular automata (CA) model. CS-SA is designed to prohibit a kind of ping-pong jump when two objects standing together try to move in opposite directions. CS-CAR is designed to change the solution of conflict in parallel update. CS-CAR encourages the objects involved in parallel conflicts choose their alternative routes instead of waiting. We also combine the two cooperation strategies (CS-SA-CAR) to test their combined effects. It is found that the system keeps on a partial jam phase with nonzero velocity and flow until the density reaches one. The ratios of the ping-pong jump and the waiting objects involved in conflict are decreased obviously, especially at the free phase. And the average flow is improved by the three cooperation strategies. Although the average travel time is lengthened a bit by CS-CAR, it is shorten by CS-SA and CS-SA-CAR. In addition, we discuss the advantage and applicability of decentralized cooperation modeling.

关键词： two-dimensional traffic model phase transition decentralized cooperation strategy cellular automata

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A big data based data storage systems for rock burst experiment

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International Journal of Wireless and Mobile Computing 2013年第5期6卷 463-472页

作者： Zhang, Yu Bai, Yan-Ping Zhu, Dong-Feng Lv, Zhao-Yong Department of Computer Science Beijing University of Civil Engineering and Architecture Beijing China State Key Laboratory for GeoMechanics and Deep Underground Engineering China University of Mining and Technology Beijing China School of Management Capital Normal University Beijing China School of Computer Science and Technology Beijing Institute of Technology Beijing China Department of Computer Teaching and Network Information Beijing University of Civil Engineering and Architecture Beijing China

state key laboratory for GeoMechanics and Deep Underground Engineering, Deep-Lab for short, has been committed to the study of rock burst. Deep-Lab accumulated a large number of rock-burst data. With the deepening of the research progress, massive-data dilemma, artificial-management-data dilemma and experimental-data-analysis dilemma have become three big problems of rock burst. These dilemmas restrict the development of rock burst research technologies. This article takes big data in rock burst experiment as research objects and innovatively introduces big data technology into rock burst. Digital features of rock-burst experimental data were extracted. On this basis, a big data based data storage systems for rock burst experiment, BDSS for short, was designed and built. Then an integrated rock burst experimental platform was constructed. Experiments show that, BDSS solves three dilemmas of rock burst, and realises the distributed storage system of data. BDSS also realises dynamic and efficient load of rock-burst big data, and its efficient query under complication conditions. Copyright © 2013 Inderscience Enterprises Ltd.

关键词： Big data

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Multiple Anti-windup Loops under Multiple Static Activations:Enlargement of the Domain of Attraction

Multiple Anti-windup Loops under Multiple Static Activations...

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第三十二届中国控制会议

ISBN: (纸本)9781479900305

Anti-windup design is an intuitive and efficient way to deal with input saturation *** the classic antiwindup design,the compensator is set to be activated immediately as the control signal saturates the *** important innovation in the anti-windup activation mechanism is to delay the activation of the anti-windup mechanism until the saturation reaches to a certain severity which led to a performance improvement of the resulting closed-loop *** recently,it was shown that by activating a static anti-windup mechanism in anticipation of actuator saturation,significant further performance improvements can be achieved in comparison with the delayed activation *** addition,we have combined both the delayed and anticipatory activation mechanisms,to develop the multiple activation strategy,in terms of(?) gain *** paper furthermore considers the problem of enlarging domain of attraction and demonstrates that the multiple activation of a static multiple feedback anti-windup mechanism would also lead to significant performance improvements over both the immediate and delayed activation schemes.

关键词： Actuator saturation anti-windup anticipatory activation domain of attraction multiple activation

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