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作者： Yeung, E. Gonçalves, J. Sandberg, H. Warnick, S. Control and Dynamical Systems California Institute of Technology United States Information and Decision Algorithms Laboratories Brigham Young University Provo UT United States Control Group Department of Engineering University of Cambridge Cambridge United Kingdom Automatic Control Laboratory KTH School of Electrical Engineering Stockholm Sweden

ISBN: (纸本)9781457700804

A dynamical system can exhibit structure on multiple levels. Different system representations can capture different elements of a dynamical system's structure. We consider LTI input-output dynamical systems and present four representations of structure: complete computational structure, subsystem structure, signal structure, and input output sparsity structure. We then explore some of the mathematical relationships that relate these different representations of structure. In particular, we show that signal and subsystem structure are fundamentally different ways of representing system structure. A signal structure does not always specify a unique subsystem structure nor does subsystem structure always specify a unique signal structure. We illustrate these concepts with a numerical example. © 2011 AACC American Automatic control Council.

关键词： Dynamical systems

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Distributed coordination for connectivity-preserving flocking without velocity measurement

Distributed coordination for connectivity-preserving flockin...

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作者： Wang, Lin Wang, Xiaofan Hu, Xiaoming Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Shanghai 200240 China Optimization and Systems Theory Royal Institute of Technology Stockholm SE-100 44 Sweden

ISBN: (纸本)9788995605646

In this paper, we address the design of decentralized controller for connectivity-preserving flocking without velocity measurement. An output vector based on neighbors' position information alone is constructed to replace the role of velocity, then some bounded attractive and repulsive forces are integrated together to design the controller. Under some initial conditions, we prove that the controller not only can synchronize all agents, but also can avoid collision as well as preserving connectivity among agents for all the time. Moreover, a leader-follower method is used to guide the group to a desired direction, where the neighboring relationship is totally determined by the distance. © 2011 Asian control Association.

关键词： controllers

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Experiment design for Pauli channel estimation

Experiment design for Pauli channel estimation

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作者： Balló, Gábor Hangos, Katalin M. Department of Electrical Engineering and Information Systems University of Pannonia Egyetem u. 10 H-8200 Veszprém Hungary Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary

ISBN: (纸本)9783902661937

Experiment design for quantum channel parameter estimation includes the design of the quantum input to the channel and the observables to be applied on the resulting quantum output system, called the experiment configuration. An experiment design procedure based on maximizing the Fisher information of the qubit Pauli channel parameters is presented in this paper. It can be shown that the Fisher information is a convex function in both the input and the experiment configuration parameters. This leads to an optimal setting that includes pure input states and projective measurements directed towards the channel directions. An iterative method of estimating the channel directions is also proposed. © 2011 IFAC.

关键词： Iterative methods

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Novel Selenium-containing Human Single-chain Variable Fragment with Glutathione Peroxidase Activity from Computer-aided Molecular Design

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Chemical Research in Chinese Universities 2011年第5期27卷 813-819页

作者： WANG Cheng WAN Pei GONG Ping-sheng LV Li-min XU Ya-wei ZHAO Yang HE Bo ZHAO Gang YAN Gang-lin MU Ying LV Shao-wu LUO Gui-min Key Laboratory for Molecular Enzymology and Engineering Ministry of Education College of Life Science Jilin University Changchun 130012 P. R. China State Key Laboratory of Industrial Control Technology Research Center for Analytical Instrumentation Institute of Cyber-systems and Control Zhejiang University Hangzhou 310058 P. R. China Department of Biochemistry School of Basic Medical Sciences Jilin Medical College Jilin 132013 P. R. China

In order to enhance the glutathione peroxidase（GPX） catalytic activity of the selenium-containing single-chain variable fragments（Se-scFv）, a novel human scFv was designed on the basis of the structure of human antibody and optimized via bioinformatics methods such as homologous sequence analysis, three-dimensional（3D） model building, binding-site analysis and docking. The DNA sequence of the new human scFv was synthesized and cloned into the expression vector pET22b（＋）, then the scFv protein was expressed in soluble form in Escherichia coli BL21（DE3） and purified by Ni2＋-immobilized metal affinity chromatography（IMAC）. The serine residue of scFv in the active site was converted into selenocysteine（Sec） with the chemical modification method, thus, the human Se-scFv with GPX activity was obtained. The GPX activity of the Se-scFv protein was characterized. Compared with other Se-scFv, the new human Se-scFv showed similar efficiency for catalyzing the reduction of hydrogen peroxide by glutathione. It exhibited pH and temperature dependent catalytic activity and a typical ping-pong kinetic mechanism.

关键词： Glutathione peroxidase（GPX） Single-chain variable fragment（scFV） Three-dimensional model Selenium

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Differential evolution with adaptive population size combining lifetime and extinction mechanisms

Differential evolution with adaptive population size combini...

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作者： Zhang, Chunmei Chen, Jie Xin, Bin Cai, Tao Chen, Chen School of Automation Beijing Institute of Technology Beijing China Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing China School of Electronic Information Engineering Taiyuan University of Science and Technology Shanxi China Department of Automation Tsinghua University Beijing China

ISBN: (纸本)9788995605646

Differential Evolution (DE) is a simple and efficient numerical optimization method. Most DE variants in the literature adopt fixed population size. This paper incorporates into DE the mechanisms of lifetime and extinction which regulate DE's population size in an adaptive manner. The population size is adjusted according to the online progress of fitness improvement. Two schemes of inserting new individuals are proposed to match different mechanisms respectively. The performance of these innovations is examined through the optimization of benchmark problems. The results show that the proposed adaptive population sizing strategy is efficient for improving the convergence and efficiency of the DE. © 2011 Asian control Association.

关键词： Optimization

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The influence of the spatial separation of control elements on the workload for mobile information systems 11

The influence of the spatial separation of control elements ...

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13th International Conference on Human-Computer Interaction with Mobile Devices and Services, Mobile HCI 2011

作者： Ziegler, Jens Graube, Markus Suhrbier, Alexander Wessel, Niels Malberg, Hagen Urbas, Leon Department of Distributed Control Systems Engineering Institute of Automation Dresden University of Technology 01062 Dresden Germany Institute for Applied Computer Science KIT Karlsruhe Institute of Technology 76344 Eggenstein-Leopoldshafen Germany Department of Physics Humboldt-Universität Zu Berlin 10115 Berlin Germany Institute for Biomedical Engineering Dresden University of Technology 01062 Dresden Germany

ISBN: (纸本)9781450305419

Mobile information systems (MIS) are finding their way into private and business every-day activities. There are also increased attempts to establish MIS for on-site activities in industrial facilities. Industrial environments, however, place significantly higher demands on mobile user interfaces than office or home environments. Common interaction styles are often unsuitable for this domain. MIS comprising specialized configurations like wearable systems might overcome current limitations. Wearable systems make it possible to arrange system components in the immediate environment of the user's body in order to create an ergonomic and intuitive user interface. However, the use of distributed, body-worn user interfaces, and in particular separation of input and output devices, might increase the workload for the user. This study examines the extent to which the separation of input and output devices affects the workload for wearable MIS. Three interaction styles in two different configurations are investigated with four different measures to determine the workload covering both objective and subjective indicators. This investigation shows that there is no significant increase of workload in general. However, the measurement of the heart rate variability revealed subtle but significant differences between the two configurations, particularly for one interaction style. These findings indicate that physiological measures can provide more detailed and subtle information about additional workload and its source than other measures. © 2011 ACM.

关键词： Human computer interaction

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Aerodynamic characteristics analysis and capability assessment of structural damaged aircraft with advanced configuration

Aerodynamic characteristics analysis and capability assessme...

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International Conference on Electronics, Communications and control (ICECC)

作者： Yang Wen Lingyu Yang Gongzhang Shen Science and Technology on Aircraft Control Laboratory Department of Automation Science and Electrical Engineering BUAA Beijing China

Structural damage may weaken the aircraft and lead to loss of control, which is the leading cause of aircraft fatal accidents in the world. Meanwhile, advanced configuration aircraft is more complex than traditional aircraft and the controlling is more difficult. Hence, based on the modeling of structural damaged aircraft, firstly, the aerodynamic characteristics are analyzed according to trim, linearization, stick-fixed response and disturbance simulation. The results show that the damage causes offset of center of gravity and the pitch-roll, pitch-yaw coupling, which would make the emergency more complex. Secondly, the remaining flight performance is calculated by inducing the Remaining Capability Factor, which indicates that the remaining flight performance is reduced due to the damage. The results of above analysis should be considered in the future controller design.

关键词： Aircraft Atmospheric modeling Aerospace control Mathematical model Equations Aerodynamics Couplings

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Modeling and Multi-objective Optimization of Refinery Hydrogen Network

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Chinese Journal of Chemical engineering 2011年第6期19卷 990-998页

作者：焦云强苏宏业廖祖维侯卫锋 State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China State Key Laboratory of Chemical Engineering Department of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 China Zhejiang ＂Supcon Software Co. Ltd. Hangzhou 310053 China

The demand of hydrogen in oil refinery is increasing as market forces and environmental legislation, so hydrogen network management is becoming increasingly important in refineries. Most studies focused on single-objective optimization problem for the hydrogen network, but few account for the multi-objective optimization problem. This paper presents a novel approach for modeling and multi-objective optimization for hydrogen network in refineries. An improved multi-objective optimization model is proposed based on the concept of superstructure. The optimization includes minimization of operating cost and minimization of investment cost of equipment. The proposed methodology for the multi-objective optimization of hydrogen network takes into account flow rate constraints, pressure constraints, purity constraints, impurity constraints, payback period, etc. The method considers all the feasible connections and subjects this to mixed-integer nonlinear programming （MINLP）. A deterministic optimization method is applied to solve this multi-objective optimization problem. Finally, a real case study is intro-duced to illustrate the applicability of the approach.

关键词： refinery multi-objective optimization hydrogen network mixed integer nonlinear programming

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Improved Particle Filter for Object Tracking

Improved Particle Filter for Object Tracking

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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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Growing artificial transportation systems: A rule-based iterative design process

Growing artificial transportation systems: A rule-based iter...

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作者： Li, Jinyuan Tang, Shuming Wang, Xiqin Duan, Wei Wang, Fei-Yue Department of Electronic Engineering Tsinghua University Beijing 100084 China Shandong University of Science and Technology Institute of Automation Chinese Academy of Sciences Beijing 100190 China National University of Defense Technology Institute of Automation Chinese Academy of Sciences Beijing 100190 China Key Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing 100190 China

Artificial transportation systems (ATS) are an extension of traffic simulations that deal with transportation issues from the complex systems perspective in a systematic and synthetic way. A rule-based iterative ATS design process is presented in this paper, together with a prototype based on the multiagent platformSwarm and the methods and results of computational experiments conducted on it. Both emergence-based observation and statistical analysis are used to evaluate those results. This paper demonstrates the ability of ATS to generate traffic phenomena from simple consensus rules and the possibility of designing a growing ATS with readily available multiagent tools. © 2006 IEEE.

关键词： Iterative methods

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