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2009 2nd International Congress on Image and Signal Processing, CISP'09

作者： Xiaodong, Li Shumin, Fei Tao, Zhang Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education School of Automation South-East University Nanjing China

ISBN: (纸本)9781424441310

In order to improve the face recognition performance using Gabor wavelet, a multi-channel dimension reduction scheme (MDRS) employing PCA algorithm is proposed. In addition, the selection of scales and orientations in Gabor transformation is investigated. Different from existing dimension reduction methods which employed ensemble dimension reduction scheme (EDRS), in MDRS model, PCA algorithm is performed on total convolution results related to a certain Gabor filter to get feature vector whose dimensions are reduced. The process is repeated according to the number of other different Gabor filters. So a given face image sample has the same number of feature vectors as that of Gabor filters, and the final augmented feature vector could be derived by concatenating all these feature vectors. The experiment results in the popular face databases such as YALE and FERET demonstrate not only that the proposed method is effective but also that the traditional selection of scale and orientation is not optimal. ©2009 IEEE.

关键词： Face recognition

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Adaptive control for a class of discrete-time time-delay systems with regard to delay parameter

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Journal of systems engineering and Electronics 2009年第1期20卷 159-167页

作者： Chai Lin Cheng Ming Fei Shumin Zhai Junyong Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education School of Automation Southeast Univ. Nanjing 210096 P. R. China School of eleetrics Southeast Univ. Nanjing 210096 P. R. China

The memory state feedback control problem for a class of discrete-time systems with input delay and unknown state delay is addressed based on LMIs and Lyapunov-Krasovskii functional method. Under the action of our designed adaptive control law, the unknown time-delay parameter is included in memory state feedback controller. Using LMI technique, delay-dependent sufficient conditions for the existence of the feedback controller are obtained. Finally, the effectiveness of the proposed design method is demonstrated by a numerical example.

关键词： discrete-time time-delay systems adaptive control linear matrix inequality.

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Prisoner＇s Dilemma Game on Clustered Scale-Free Networks under Different Initial Distributions

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Chinese Physics Letters 2009年第8期26卷 6-9页

作者：雷创贾建援陈小杰丛睿王龙 School of Mechano-electronic Engineering Xidian University Xi'an 710071 State Key Laboratory for Turbulence and Complex Systems Center for Systems and Control College of Engineering Peking University Beijing 100871

The evolutionary prisoner＇s dilemma game is investigated under different initial distributions for cooperators and defectors on scale-free networks with a tunable clustering coefficient. It is found that, on the one hand, cooperation can be enhanced with the increasing clustering coefficient when only the most connected nodes are occupied by cooperators initially. On the other hand, if cooperators just occupy the lowest-degree nodes at the beginning, then the higher the value of the clustering coefficient, the more unfavorable the environment for cooperators to survive for the increment of temptation to defect. Thereafter, we analytically argue these nontrivial phenomena by calculating the cooperation probability of the nodes with different degrees in the steady state, and obtain the critical values of initial frequency of cooperators below which cooperators would vanish finally for the two initial distributions.

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Prisoner＇s Dilemma Game on Two Types of Positively Correlated Networks

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Chinese Physics Letters 2009年第4期26卷 267-270页

作者：刘永奎李智陈小杰王龙 Center for Complex Systems Department of Automatic Control Engineering Xidian University Xi'an 710071 State Key Laboratory for Turbulence and Complex Systems Center for Systems and Control College of Engineering Peking University Beijing 100871 Department of Zoology University of British Columbia Vancouver BC V6T 1Z4 Canada

We study the effects of degree correlations on the evolution of cooperation in the prisoner＇s dilemma game with individuals located on two types of positively correlated networks. It is shown that the positive degree correlation can either promote or inhibit the emergence of cooperation depending on network configurations. Furthermore, we investigate the probability to cooperate as a function of connectivity degree, and find that high-degree individuals generally have a higher tendency to cooperate. Finally, it is found that small-degree individuals usually change their strategy more frequently, and such change is shown to be unfavourable to cooperation for both kinds of networks.

关键词： PRISONER'S dilemma game CORRELATION (Statistics) COOPERATION CONFIGURATIONS (Geometry) PROBABILITY theory GAME theory

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Improved color-based particle filter for tracking moving object

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Journal of Computational Information systems 2009年第1期5卷 323-330页

作者： Zhang, Tao Fei, Shumin Li, Xiaodong Lu, Hong Key Laboratory of Measurement and Control of Complex Systems of Engineering Southeast University Nanjing 210096 China

Robust real-time tracking of non-rigid objects is a challenging task. Color is a powerful feature for tracking deformable objects in image sequences with complex backgrounds. Color distribution is applied, as it is robust to partial occlusion, is rotation and scale invariant and computationally efficient. Particle filter has been proven very successful for non-linear and non-Gaussian estimation tracking problems. The article presents the integration of color distributions into particle filtering. A target is tracked with a particle filter by comparing its histogram with the histograms of the sample positions using the Bhattacharyya distance. Additionally, to solve the sample impoverishment (all particles collapse to a single point within a few iterations) in the particle-filter algorithm, a new resampling algorithm is proposed to tackle sample impoverishment. The performance of the proposed filter is evaluated qualitatively on various real-world video sequences. The experimental results show that the improved color-based particle filter algorithm can reduce sample impoverishment effectively and track the moving object very well. Copyright © 2009 Binary Information Press.

关键词： Color

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Evolutionary Self-Questioning Games with Local Contribution

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Chinese Physics Letters 2009年第8期26卷 377-380页

作者：刘永奎李智陈小杰王龙 Center for Complex Systems Department of Automatic Control Engineering Xidian University Xi'an 710071 State Key Laboratory for-Turbulence and Complex Systems Center for Systems and Control College of Engineering Peking University Beijing 100871 Department of Zoology University of British Columbia Vancouver BC V6T 1Z4 Canada

We investigate the evolutionary Prisoner＇s Dilemma and the Snowdrift Game on small-world networks in a realistic social context where individuals consider their local contributions to their group and update their strategies by self-questioning. An individual with introspection can determine whether its current strategy is superior by playing a virtual round of the game and its local contribution is defined as the sum of all the payoffs its neighbors collect against it. In our model, the performance of an individual is determined by both its payoff and local contribution through a linear combination. We demonstrate that the present mechanism can produce very robust cooperative behavior in both games. Furthermore, we provide theoretical analysis based on mean-field approximation, and find that the analytical predictions are qualitatively consistent with the simulation results.

关键词： PRISONER'S dilemma game SOCIAL networks GAME theory SIMULATION methods & models MEAN field theory APPROXIMATION theory QUALITATIVE research

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Precedence graph-oriented approach to optimise single-product flow-line configurations of reconfigurable manufacturing system

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INTERNATIONAL JOURNAL OF COMPUTER INTEGRATED MANUFACTURING 2009年第10期22卷 923-940页

作者： Dou, J. P. Dai, X. Meng, Z. Key Laboratory of Measurement and Control of Complex Systems of Engineering School of Automation Southeast University Ministry of Education China

To facilitate the configuration selection of reconfigurable manufacturing systems, it needs to generate K (predefined number) best configurations as candidates for a given demand period. This paper presents a systematic approach for the problem of generating single-product flow-line (SPFL) configurations. The problem is to determine the SPFL configuration's parameters including number of workstations, number of paralleling machines and machine type as well as assigned operations for each workstation. Given an operation precedence graph (PG) and machine options for each operation, the objective is to minimise the capital costs of SPFL configurations subject to space limitation, investment limitation, and capacity constraint as well as precedence constraints among operations. For linear PG with one feasible operation sequence (FOS), a constrained K-shortest paths (CKSP) formulation is developed and a CKSP algorithm is introduced to generate K-best configurations including the optimal and near-optimal ones. For simple PG (a small number of FOSs), the K-best configurations are found by repeatedly solving the CKSP problem associated with every FOS. For general PG (numerous FOSs), a GA based approach is proposed to identify K-best configurations through searching within the optimal configurations associated with all FOSs. Case studies illustrate the effectiveness and efficiency of our approach.

关键词： reconfigurable manufacturing system configuration generation flow-line precedence graph constrained K-shortest paths genetic algorithm

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Mean-square exponential stability of stochastic Markovian jump systems with mode-dependent time-varying delays

Mean-square exponential stability of stochastic Markovian ju...

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Li Ma Fei-Peng Da Kan-Jian Zhang Key Laboratory of Measurement and Control for Complex Systems of Engineering Ministry of EducationSoutheast University

In this paper,the mean-square exponential stability problem is investigated for stochastic Markovian jump open-loop systems with mode-dependent time-varying *** constructing a modified Lyapunov-Krasovskii functional,a delay-dependent sufficient condition for the solvability of the above problem is presented in terms of linear matrix inequalities（LMIs）.The decay rate can be a given finite positive constant and synchronously the derivative of time-varying delays is only required to have a upper bound which is not required to be less than *** examples are presented to illustrate the effectiveness of the theoretical result.

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Modified Particle Filter for Object Tracking in Low Frame Rate Video

Modified Particle Filter for Object Tracking in Low Frame Ra...

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Tao Zhang Shumin Fei Hong Lu Xiaodong Li the Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationInstitute of AutomationSoutheast University the Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Institute of AutomationSoutheast University School of Automation Nanjing Institute of Technology

Object tracking algorithm using modified Particle filter in low frame rate(LFR) video is proposed in this paper,which the object moving significantly and randomly between consecutive frames in the low frame rate ***,Particle filtering use motion transitions to model the movement of the ***,in object tracking with low frame rate sequences,it is very difficult to model significant random jumps of *** key notion of our solution is that using the object detection and extraction to locate the tracked object,while not using the dynamical *** propagate the sample set around the detected regions,which the samples are assumed to be uniformly distributed in the neighborhoods of the detected *** is similar to the general particle filter to propagate *** we compute the likelihood between the target model and the candidate regions,which are based on color histogram *** extensive experiments show that the proposed algorithm performs robustly in a large variety of tracking scenarios.

关键词： frame filter Modified Particle Filter for Object Tracking in Low Frame Rate Video Object Filter

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Partner switching stabilizes cooperation in coevolutionary prisoner’s dilemma

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Physical Review E 2009年第3期79卷 036101-036101页

作者： Feng Fu Te Wu Long Wang Program for Evolutionary Dynamics Harvard University Cambridge Massachusetts 02138 USA Center for Systems and Control State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China

Previous studies suggest that cooperation prevails when individuals can switch their interaction partners quickly. However, it is still unclear how quickly individuals should switch adverse partners to maximize cooperation. To address this issue, we propose a simple model of coevolutionary prisoner’s dilemma in which individuals are allowed to either adjust their strategies or switch their defective partners. Interestingly, we find that, depending on the game parameter, there is an optimal tendency of switching adverse partnerships that maximizes the fraction of cooperators in the population. We confirm that the stabilization of cooperation by partner switching remains effective under some situations, where either normalized or accumulated payoff is used in strategy updating, and where either only cooperators or all individuals are privileged to sever disadvantageous partners. We also provide an extended pair approximation to study the coevolutionary dynamics. Our results may be helpful in understanding the role of partner switching in the stabilization of cooperation in the real world.

关键词： Stabilization

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