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2012 9th IEEE International Conference on Networking, Sensing and control, ICNSC 2012

作者： Yan, Xiaobo Wu, Weimin State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

ISBN: (纸本)9781467303880

Hysteretic optimization (HO) is a recently proposed heuristic physical optimization algorithm based on the well-known demagnetization process of magnetic materials in magnetism. The Capacitated Vehicle Routing Problem (CVRP) is an important variant of the vehicle routing problem which is one of the most important and intensively studied combinatorial optimization problems. In this study, we apply HO to the Capacitated Vehicle Routing Problem (CVRP), by generalizing the external field and endowing the configuration space with a proper distance. The experimental results with benchmark problems show the proposed method is competitive with other popular algorithms, such as particle swarm optimization, genetic algorithms. © 2012 IEEE.

关键词： Magnetic materials

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Petri nets model of emergency control system for shipping

Petri nets model of emergency control system for shipping

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2012 9th IEEE International Conference on Networking, Sensing and control, ICNSC 2012

作者： Zou, Juan Wei, Yong Wu, Weimin State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

ISBN: (纸本)9781467303880

An emergency control system for shipping is an indispensable part of the modern maritime operation system. Petri nets are useful for describing and studying information processing systems that are characterized as being concurrent, distributed parallel and asynchronous. In this paper, a generalized stochastic Petri net with finite capacity and inhibitor arc is exploited to model the emergency control system for shipping. The obtained model is analyzed using the software of PIPE. The analyzed results on modeling time and resource performance show that the obtained model is able to describe well the real physics system and provide some suggestion on improving the performance of the emergency control system for shipping. © 2012 IEEE.

关键词： Stochastic systems

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Hysteretic optimization for the 3D protein folding based on the lattice model

Hysteretic optimization for the 3D protein folding based on ...

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2012 International Applied Mechanics, MechatronicsAutomation and System Simulation Meeting, AMMASS 2012

作者： Xiong, Ru Lu, Yong-Zai Zhou, Xuanhao Xu, Weihua State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

Due to the critical positions of the studies of protein folding in medical and biological systems, the intelligent computation has been playing more and more important role in modeling and optimization for protein folding systems. This paper presents the applications of hysteretic optimization (HO) being a recent proposed physical principle inspired intelligent optimization solution for a 3D protein folding problem with lattice model. According to the characteristics of 3D protein folding model, the four key ingredients of HO approach, namely dynamics, distance, reference states and point of avalanche, are well defined. A proposed modified HO algorithm is successfully implemented for studies on 3D protein folding problems. Furthermore, the benchmark based numerous simulation results show the efficiency of the proposed HO method, and the relationship between the HO parameter setting and the resulting performance. © (2012) Trans Tech Publications, Switzerland.

关键词： Protein folding

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An algorithm for detection of malicious messages on CAN buses

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2012 National Conference on Information technology and Computer Science, CITCS 2012

作者： Ling, Congli Feng, Dongqin State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

ISBN: (纸本)9789491216381

control systems are encountering increasing security threats;as one of the common systems, CAN control system is very facile to be attacked. Aiming at the improvement of CAN control system security, an algorithm for detection of malicious CAN messages is given, and it has been implemented in the CANoe simulation environment. The result shows that this algorithm has powerful detection function and valuable practice signification. © 2012. The authors - Published by Atlantis Press.

关键词： Signal detection

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ZnO/CuS heterostructured nanocomposite and its organic functionalisation

ZnO/CuS heterostructured nanocomposite and its organic funct...

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12th IUMRS International Conference on Advanced Materials(IUMRS-ICAM2013)

作者： Q.Cong X.He M.Gao X.Ma G.Li School of Environmental and Material Engineering Center of Advanced Functional MaterialsYantai University State Key Laboratory of Silicon Materials Zhejiang University National Laboratory of Industrial Control Technology Institute of CyberSystems and ControlZhejiang University

In order to extend the visible light response of ZnO, ZnO/Cu S nanocomposite with heterostructure was prepared by a simple two-step hydrothermal synthesis. The as prepared ZnO/Cu S heterostructured nanocomposite was characterised by SEM, photoluminescence, ultraviolet–visible spectroscopy and X-ray diffraction. On the other hand, chitosan is considered as a very promising natural biopolymer. It holds not only abundant resource and low cost but also has excellent adsorption properties to a broad range of organic pollutants and some heavy metal *** improve the adsorption properties of ZnO/Cu S heterostructured nanocomposite, a water soluble chitosan containing carboxyl groups was synthesised with graft *** modification of ZnO/Cu S heterostructured nanocomposite was carried out utilising the self-assembly process between hydroxyl groups of ZnO/Cu S nanocomposite and carboxyl groups of water soluble chitosan. Comparative tests before and after surface modification were performed with Fourier transform infrared spectroscopy. To examine the surface and interface properties of nanocomposites, chemical prototype sensor arrays were constructed based on ZnO, ZnO/Cu S nanocomposite, and ZnO/Cu S nanocomposite modified with chitosan containing carboxyl groups and quartz crystal microbalance devices. The adsorption response behaviours of the sensor arrays to some typical volatile compounds were examined. The results indicated that, with comparison to ZnO nanostructure, the ZnO/Cu S nanocomposite exhibited enhanced adsorption properties to some typical volatile compounds dramatically, and the effect of one layer modification on the surface adsorption properties of ZnO/Cu S nanocomposite is also very evident and useful, which provides a microenvironment of biocompatibility for ZnO/Cu S *** same time, ZnO/Cu S nanocomposite showed broadening visible light response and hence has good potential applications in new energy materials, photocatalysts

关键词： ZnO based nanocomposite,Heterostructures,Surface and interface properties,Self-assembly surface modification,Device arrays,Enhanced sensitivity

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Surface modification of ZnO nanosheets with Au/polyaniline and their properties

Surface modification of ZnO nanosheets with Au/polyaniline a...

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12th IUMRS International Conference on Advanced Materials(IUMRS-ICAM2013)

作者： Q.Cong H.Geng X.He M.Gao X.Ma G.Li School of Environmental and Material Engineering Center of Advanced Functional MaterialsYantai University State Key Laboratory of Silicon Materials Zhejiang University National Laboratory of Industrial Control Technology Institute of CyberSystems and ControlZhejiang University

ZnO has many potential applications, such as, solar cells, photocatalysts, chemical sensors and biosensors. However, to extend its visible light response is still a great challenge. In this paper,ZnO nanosheets were prepared by a wet chemical method. The surface treatment of ZnO nanosheets was carried out using chloroauric acid, and then reduced with aniline. A series of characterisations were examined by TEM(transmission electron microscopy), XRD(X-ray diffraction), the Fourier transform infrared(FTIR) spectra and ultraviolet-visible spectroscopy(UVvis). The experimental results indicated that ZnO nanosheets modified with a thin layer of Au/PANi composite exhibited wide visible light response. A chemical prototype sensor was constructed based on the ZnO/Au/polyaniline nanocomposites prepared and interdigital electrodes on flexible polymer substrates. The effects of surface treatment of ZnO nanosheets on the gas sensing behaviours were examined. The results indicated that the effective conductive channels for charge transfer and separation were formed due to the Au/polyaniline necklaces attached on the surface of ZnO nanosheets, and the type of conductivity of ZnO/Au/polyaniline nanocomposite changed to P-type from N-type with increasing the amounts of chloroauric acid. When the synthesis parameter of ZnO/Au/polyaniline nanocomposite was optimised, the gas sensitivity of ZnO/Au/PANi(polyaniline) was superior to that of PANi nanowire prepared under similar synthesis condition, and it has been found that this kind of nanocomposite not only possesses widening light response, harvests more visible light, but also presents effective channels for charge transfer. It would be useful in potential applications in photocatalysts or other fields.

关键词： ZnO Nano/microstructures,Surface modification,Nanocomposite,Broadening visible light response,Sensitive mechanism

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Adaptive visual servoing using common image features with unknown geometric parameters

Adaptive visual servoing using common image features with un...

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作者： Liu, Yun-Hui Wang, Hesheng Chen, Weidong Zhou, Dongxiang Department of Mechanical and Automation Engineering Chinese University of Hong Kong Hong Kong Hong Kong Department of Automation Shanghai Jiao Tong University China Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 China State Key Laboratory of Robotics Technology and System Harbin Institute of Technology Harbin 150001 China Joint Center for Intelligent Sensing and Systems National University of Defense Technology China

This paper generalizes the concept of the depth-independent interaction matrix, developed for point and line features in our early work, to generalized image features. We derive the conditions under which the depth-independent interaction matrix can be linearly parameterized by the geometric parameters of the generalized image features, and propose an adaptive visual servo controller for robot manipulators using the generalized image features whose geometric parameters are unknown. To estimate the unknown parameters on-line, we propose new error functions that are linear to estimation errors of the parameters and an algorithm that minimizes the error functions using multiple images. The Lyapunov theory is used to prove asymptotic stability of the proposed controller based on the nonlinear dynamics of the manipulator. It is also shown that in addition to points and lines, other common image features like distances, angles, areas, and centroids all satisfy the conditions for the linear parameterization. Experiments have been conducted to validate the proposed control method. © 2013 Elsevier Ltd. All rights reserved.

关键词： controllers

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A Robust Strictly Passive Output—Error Identifier for Continuous—Time systems

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IFAC Proceedings Volumes 2013年第11期46卷 170-175页

作者： Lei Wang Romeo Ortega Hongye Su Xiangbin Liu Yang Zhu State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 P.R.China Laboratoire des Signaux et Systèmes L2S CNRS UMR 8506 Supélec Univ Paris Sud-P11 91192 Gif sur Yvette France Beijing Jiaotong University Beijing 100044 China

This paper shows that the adaptive output error identifier for linear time–invariant continuous–time systems proposed by (Betser and Zeheb [1995]) is robust vis–à–vis measurement noise. More precisely, it is proven that the map from the noise to the estimation error is –stable—provided a tuning parameter is chosen sufficiently large. A procedure to determine the required minimal value of this parameter is also given. If the noise is exponentially vanishing, asymptotic convergence to zero of the prediction error is achieved. Instrument for the establishment of the results is a suitable decomposition of the error system equations that allows us to strengthen—to strict —the well-known passivity property of the identifier. The estimator does not require fast adaptation, a dead-zone, nor the knowledge of an upperbound on the noise magnitude, which is an essential requirement to prove stability of standard output error identifiers. To robustify the estimator with respect to non–square integrable (but bounded) noises a prediction error-dependent leakage term is added in the integral adaptation. A simulated example, which is unstable for the equation error identifier and the output error identifier of (Betser and Zeheb [1995]), is used to illustrate the noise insensitivity property of the new scheme.

关键词： Output-error identification identification of continuous-time systems passivity

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A Review for Model Plant Mismatch Measures in Process Monitoring

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Chinese Journal of Chemical Engineering 2012年第6期20卷 1039-1046页

作者：王洪谢磊宋执环 State Key Laboratory of Industrial Control Technology Institute of Industrial Process ControlZhejiang University Institute of Cyber-Systems and Control Zhejiang University

Model is usually necessary for the design of a control loop. Due to simplification and unknown dynamics, model plant mismatch is inevitable in the control loop. In process monitoring, detection of mismatch and evaluation of its influences are demanded. In this paper several mismatch measures are presented based on different model descriptions. They are categorized into different groups from different perspectives and their potential in detection and diagnosis is evaluated. Two case studies on mixing process and distillation process demonstrate the efficacy of the framework of mismatch monitoring.

关键词： model plant mismatch process monitoring control loop behavior

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Robust Stochastic control for Networked Bilateral Teleoperation systems

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IFAC Proceedings Volumes 2013年第20期46卷 112-117页

作者： Jian-ning Li Ya-Jun Pan Trent Hilliard Hongye Su National Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Yuquan Campus Hangzhou 310027 P.R. China Department of Mechanical Engineering Dalhousie University P.O. Box 15000 Halifax NS B3H 4R2 Canada

In this paper, novel H ∞ controllers are proposed for networked bilateral teleoperation system with time-varying delays and random packet losses. The manipulators are considered as parametric non-identical manipulators. The characteristic of network, such as random time-varying delays and packet losses are thoroughly incorporated in the design. For such systems, the mismatched-model terms are treated as disturbance, then, the model of closed-loop error dynamics are derived. By constructing novel time delay and packet loss dependent Lyapunov functionals, a sufficient condition is derived to ensure the exponentially mean square stability with a given disturbance attenuation level &gM. Experimental results show the effectiveness of the proposed modeling method and control scheme.

关键词： Networked control systems time-varying delays packet losses H ∞ control bilateral teleoperation systems

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