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2011 China control and Decision Conference(2011中国控制与决策会议 CCDC)

作者： Tao Zhang Shu-min Fei College of Automation Electronic Engineering Qingdao University of Sciences and TechnologyQingdao Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationIn

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.

关键词： Particle filter Object Tracking Robust Tracking

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How to guide a sustainable industrial economy: Emergy account for resources input of Chinese industry

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Procedia Environmental Sciences 2011年 5卷 51-59页

作者： B. Zhang G.Q. Chen Q. Yang Z.M. Chen B. Chen Z. Li State Key Laboratory of Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China

Emergy analysis provides a feasible approach to evaluate the status and position of different energy carriers in the universal energy hierarchy. In this paper, an emergy-based method is conducted to measure the resources input of Chinese industry from 1997 to 2006. Resources inflows including fossil fuels, mineral resources, agricultural products, and other imported materials are accounted, based on which related indicators including resources intensity, industrial output, and environmental emissions are investigated. Results show a steady upward trend for the total resources input of Chinese industry during the past decade. The total resources input amounted to 1.53×1025 sej in 2006, of which non-renewable one accounted for 70.65% owing to the dominating input of fossil fuels and nonmetal minerals. Resources intensity measured by the ratio of resources input to industrial value added declined gradually during 1997–2002, but the rapid expansion of resource–intensive sub–sectors resulted in a reverse trend since 2003. The current resources use pattern of Chinese industry is characterized by increasing input of non-renewable resources, excessive expansion of resource–intensive production, and tremendous challenge from environmental pressure.

关键词： Emergy Resources input Chinese industry

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Translational Offset Detection Based on Far-Field Intensity for Grating Tiling

Translational Offset Detection Based on Far-Field Intensity ...

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2011 IEEE International Conference Mechatronics and Automation(2011 IEEE机电一体化与自动化国际会议)

作者： Zaojun Fang Yanlong Huang Min Tan De Xu Lan Xia State Key Laboratory of Intelligent Control and Management of Complex Systems Institute of Automatio Laboratory of Shanghai Institute of Laser and Plasma Chinese Academy of Engineering Physics Shanghai

The far-field intensity is detected from far-field image to estimate the piston distance between two gratings. The image processing algorithm includes projections along the horizontal and vertical directions, search for each focal spot's centre, feature extraction and intensity computation. Each focal spot's centre can be found with the projections. A self-growing method is used for feature extraction, where the threshold value depends on the gray value of each focal spot's centre. For each focal spot, the sum of gray values within the relevant domain is taken to be its energy intensity. Furthermore, the energy ratio of left and main focal spots (or main and right focal spots) is computed. A formula that expresses the piston distance between two gratings as the function of the energy ratio is fitted with several measured points. Based on this formula, the piston distance is obtained for a new energy-ratio. Finally, the proposed method is verified with a series of experiments.

关键词： Image processing grating tiling far-field intensity focal spot piston distance

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Stability and L2-L∞ Analysis for A Class of Interconnected systems

Stability and L2-L∞ Analysis for A Class of Interconnected ...

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2011 China control and Decision Conference(2011中国控制与决策会议 CCDC)

作者： Shumin Fei Yongmin Li Yuming Chu Zhenjiang Zhao Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education School of Science Huzhou Teachers College Huzhou 313000 Zhejiang China

This paper deals with the problem of stochastically stability and L2-L∞ performance analysis for a class of interconnected Markovian jump ltering error system with constant time delays. By using mode-dependent decentralized lters and constructing mode-dependent centralized Lyapunov functional together with Jensen’s inequality, the stability conditions for the ltering error system are presented which also ensures the L2-L∞ performance. The obtained stability conditions are delay-dependent which may be less conserve than that delay independent one, especially when time-delay are very small. Furthermore, these conditions are expressed in terms of matrix inequalities (LMIs), which may provide the convenience for the design of the concerned lters through linear matrix inequality technique.

关键词： Interconnected Markovian jump systems Decentralized lters Stochastic stability L2-L∞ performance Time delays.

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Evolutionary dynamics on stochastic evolving networks for multiple-strategy games

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Physical Review E 2011年第4期84卷 046111-046111页

作者： Bin Wu Da Zhou Long Wang Center for Systems and Control State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China School of Mathematical Sciences Peking University Beijing 100871 China MOE Key Laboratory of Bioinformatics and Bioinformatics Division TNLIST Department of Automation Tsinghua University Beijing 100084 China

Evolutionary game theory on dynamical networks has received much attention. Most of the work has been focused on 2×2 games such as prisoner's dilemma and snowdrift, with general n×n games seldom addressed. In particular, analytical methods are still lacking. Here we generalize the stochastic linking dynamics proposed by Wu, Zhou, Fu, Luo, Wang, and Traulsen [PLoS ONE 5, e11187 (2010)] to n×n games. We analytically obtain that the fast linking dynamics results in the replicator dynamics with a rescaled payoff matrix. In the rescaled matrix, intuitively, each entry is the product of the original entry and the average duration time of the corresponding link. This result is shown to be robust to a wide class of imitation processes. As applications, we show both analytically and numerically that the biodiversity, modeled as the stability of a zero-sum rock-paper-scissors game, cannot be altered by the fast linking dynamics. In addition, we show that the fast linking dynamics can stabilize tit-for-tat as an evolutionary stable strategy in the repeated prisoner's dilemma game provided the interaction between the identical strategies happens sufficiently often. Our method paves the way for an analytical study of the multiple-strategy coevolutionary dynamics.

关键词： GAME theory STOCHASTIC analysis MATRICES BIODIVERSITY DYNAMICS

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Design of partitioned table for VLDB in the vehicle monitoring system

Design of partitioned table for VLDB in the vehicle monitori...

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2nd International Conference on Multimedia Technology, ICMT 2011

作者： Yang, Yanlan Ye, Hua Fei, Shumin School of Automation Southeast University Nanjing China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing China

ISBN: (纸本)9781612847740

As the number of vehicles in the monitoring system increases, the size of the table for storing their past data becomes very large, which brings performance troubles occurred in the systems with VLDB. To improve the data-access efficiency and keep the database stability, the original table is proposed to be partitioned. According to the functional requirements for database from the vehicle monitoring system, the range partition is suggested, with twelve partitions for one year's historical data and each partition corresponding to a separate month. Then the partitioned table is created after finishing the definitions of the partitioning function and the partitioning schema, where the former gives a rule for partitioning and the latter specifies the storage places of partitions to different file groups. Because the data in the partitioned table is separated into several file groups, the data-access is capable of parallel processing and keeps a higher efficiency. Tests show that the partitioned table works in improving the database performance and the query time is greatly reduced compared to that cost in the original table. © 2011 IEEE.

关键词： Database systems

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Cosmic exergy based ecological assessment for a wetland in Beijing

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Ecological Modelling 2011年第2期222卷 322-329页

作者： Z.M. Chen B. Chen G.Q. Chen State Key Laboratory of Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment No. 19 Xinjiekouwai Street Beijing Normal University Beijing 100875 China

Wetlands research and restoration has become one of the critical concern due to their importance in providing ecosystem services. This study proposes a holistic methodology to assess the wetland ecosystem based on cosmic exergy as a thermodynamic orientor. This new approach is applied to two typical wastewater treatment facilities (an activated sludge system and a cyclic activated sludge system) and to a constructed wetland ecosystem in Beijing for comparison. Results show that the Beijing wetland ecosystem gains positive net present ecological value of 3.08E+14 J c regarding its total life cycle. Comparison with the activated sludge system and cyclic activated sludge system, shows that the wetland ecosystem has greater dependencies on local resources (22% vs. 0% vs. 0%) and renewable resources (67% vs. 38% vs. 31%) as well as a larger ecological sustainability index (0.64157 vs. 0.00005 vs. 0.00008). This implies that the wetland ecosystem is more environmentally friendly and sustainable method for water treatment .

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Matching decision model for self- adaptability of knowledge manufacturing system

Matching decision model for self- adaptability of knowledge ...

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International Conference on Information Science and Technology (ICIST)

作者： Yufang Wang Hongsen Yan Xiangang Meng School of Information & Control Engineering Nanjing University of Information Science and Technology Nanjing Jiangsu China Key Laboratory of Measurement and Control of Complex Systems of Engineering of Ministry of Education South-East University Nanjing Jiangsu China

ISBN: (纸本)9781424494408

Knowledge manufacturing system has the ability of modifying dynamically manufacturing mode rapidly when production environment factors change. It is essential to evaluate the matching degree of established manufacturing mode and changed production environment factors. In this paper, a matching decision model for self-adaptability of knowledge manufacturing system based on the fuzzy neural network is proposed. The changed production environment factors are regarded as linguistic variable inputs. A modified momentum factor B-P algorithm consisting of information feed-forward process and the error back-propagation process is used. The proposed FNN model is employed to evaluate the matching degree of a car-lamp production manufacturing mode to variable environment units. Matching result indicates adaptive degree of manufacturing system. Experiment result demonstrates the method is effective.

关键词： Production Manufacturing Fuzzy neural networks Neurons Training Artificial neural networks Fuzzy control

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Payoff-based accumulative effect promotes cooperation in spatial prisoner’s dilemma

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Chinese Physics B 2010年第9期19卷 53-58页

作者：刘永奎李智陈小杰王龙 Center for Complex Systems Department of Automatic Control EngineeringXidian University State Key Laboratory for Turbulence and Complex Systems Center for Systems and ControlCollege of EngineeringPeking University

We study the effect of accumulative payoff on the evolution of cooperation in the evolutionary prisoner＇s dilemma on a square lattice. We introduce a decaying factor for the accumulative payoff, which characterizes the extent that the historical payoff is accumulated. It is shown that for fixed values of the temptation to defect, the density of cooperators increases with the value of the decaying factor. This indicates that the more the historical payoff is involved, the more favourable cooperators become. In the critical region where the cooperator density converges to zero, cooperators vanish according to a power-law-like behaviour. The associated exponents agree approximately with the two-dimensional directed percolation and depend weakly on the value of the decaying factor.

关键词： payoff accumulative effect prisoner＇s dilemma cooperation

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The strategies of avoiding energy holes in wireless sensor networks

The strategies of avoiding energy holes in wireless sensor n...

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2011 4th International Congress on Image and Signal Processing(第四届图像与信号处理国际学术会议 CISP 2011)

作者： Xu QIAN Zhengjie WANG Xiaoguang ZHAO School of Mechanical Electronic & Info. Engineering China University of Mining & Technology (Beijing State Key Laboratory of Intelligent Control and Management of Complex Systems Institute of Automati

Wireless sensor networks are characterized by multihop network. Some nodes in network are required to forward a disproportionately high amount of traffic and die early, leaving the unmonitored areas in network and leading to the problem of energy hole. This paper investigates a variety of strategies to avoid the energy hole, such as communication power control, data aggregation, nonuniform energy distribution, mobile node auxiliary and clustering. The analysis and comparison of different strategies are given and the advantages and disadvantage of them are discussed in this paper.

关键词： wireless sensor networks energy balance energy hole network lifetime

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