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A texture synthesis method based on multi-resolution matching

Journal of Information and Computational science 2013年第15期10卷 5077-5082页

作者： Yin, Wenbin Qiao, Junfei Han, Guang School of Computer Science and Technology Harbin Institute of Technology Harbin 150001 China College Electronic Information and Control Engineering Beijing University of Technology Beijing 100124 China

Texture synthesis is the field of computer graphics and related basic core issues. Studies have shown that the MRF model-based two-dimensional image texture synthesis algorithm, the synthesis results are directly affected by the magnitude of the impact of random images;that is consistent with a high degree of MRF model is better than other texture synthesis texture. The same time, the quality of synthetic images and synthesis algorithms is proportional to time-consuming. In this paper, the synthesis of the texture image decomposition strategy is introduced and the concept of multi-resolution atlas. It can be used to guide the texture partition, to improve the quality of texture synthesis. Experiments show that the proposed algorithm is effective. © 2013 Binary Information Press.

关键词： Image texture

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Adaptive Cubature Strong Tracking Information Filter Using Variational Bayesian Method

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IFAC Proceedings Volumes 2014年第3期47卷 5945-5950页

作者： Quanbo Ge Chenglin Wen Shaodong Chen Ruoyu Sun Yuan Li Institute of Systems Science and Control Engineering School of Automation Hangzhou Dianzi University Hangzhou Zhejiang 310018 China Luoyang Institute of Electro Optical Equipment of AVIC Luoyang Henan 471000 China Department of Electrical and Computer Engineering University of Minnesota Minneapolis Minnesota 55414 USA Information Engineering School Shenyang University of Chemical Technology Shenyang Liaoning 100142 China

For most practical nonlinear state estimation problems, the conventional nonlinear filters do not usually work well for some cases, such as inaccurate system model, sudden change of state-interested and unknown variance of measurement noise. In this paper, an adaptive cubature strong tracking information filter using variational Bayesian (VB) method is proposed to cope with these complex cases. Firstly, the strong tracking filtering (STF) technology is used to integrally improve performance of cubature information filter (CIF) aiming at the first two cases and an iterative scheme is presented to effectively evaluate a strong tracking fading factor. Secondly, the VB method is introduced to iteratively evaluate the unknown variance of measurement noise. Finally, the novel adaptive cubature information filter is obtained by perfectly combining the STF technology with the VB method, where the variance estimation provided by the VB method guarantees normal running of the strong tracking functionality.

关键词： Nonlinear system unknown variance of measurement noise cubature information filter strong tracking filtering variational Bayesian

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A Fully Distributed Approach to Formation Maneuvering control of Multi-Agent Systems

A Fully Distributed Approach to Formation Maneuvering Contro...

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IEEE Annual Conference on Decision and control

作者： Zhimin Han Zhiyun Lin Minyue Fu State Key laboratory of Industrial Control Technology College of Electrical Engineering Zhejiang University 38 Zheda Road Hangzhou 310027 P.R. China School of Electrical Engineering and Computer Science University of Newcastle Callaghan NSW 2308 Australia

ISBN: (纸本)9781467360890

This paper studies the formation maneuvering control problem for a network of agents with the objective of achieving a desired group formation shape and a constant overall group maneuvering velocity. A fully distributed approach is developed to solve the problem. That is, a control law is proposed for each agent in the network, with its parameters capable of being designed in a distributed manner, and is implementable locally via relative sensing and communication with neighbors. Necessary and sufficient conditions regarding a critical control parameter are obtained to guarantee the globally asymptotic convergence of the overall system for both the single-integrator kinematics case and the double-integrator dynamics case.

关键词： Shape Sensors Eigenvalues and eigenfunctions Laplace equations Kinematics Decentralized control Heuristic algorithms

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Design of a multi-functional system based on virtual reality for stroke rehabilitation

Design of a multi-functional system based on virtual reality...

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World Congress on Intelligent control and Automation (WCICA)

作者： Xin Wen Feng Duan Yong Yu Jeffrey Too Chuan Tan Xiaomin Cheng College of Computer and Control Engineering Nankai University Tianjin P. R. China Institute of Industrial Science The University of Tokyo Tokyo Japan School of Mechanical Engineering Ningbo University of Technology Ningbo P. R. China

This paper presents a motor function rehabilitation system for the disabled with virtual reality. The design of the entire system is established on the SIGVerse virtual platform. The patient can complete the rehabilitation training immersed in a virtual environment. Firstly, the motion information of the patient is recognized by Kinect, and regenerated by the avatar in the virtual environment accurately. At the same time, the view of the avatar can be presented to the patient by HMD. Though this method, the patient can exposure to the virtual environment during the rehabilitation training, so that they can feel like their real and health motions in the virtual environment. Additionally, the EMG signals of the activated muscle are collected, and they can provide a feedback of contraction intensities of the muscle to the patient in real time. Moreover, we provide an electrical stimulation to the corresponding muscle. As a result, the patient can have the perception of muscle contractions.

关键词： Electromyography Muscles Electrical stimulation Training Virtual environments Avatars

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Affine Formation of Multi-Agent Systems over Directed Graphs

Affine Formation of Multi-Agent Systems over Directed Graphs

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IEEE Annual Conference on Decision and control

作者： Lili Wang Zhiyun Lin Minyue Fu State Key laboratory of Industrial Control Technology College of Electrical Engineering Zhejiang University 38 Zheda Road Hangzhou 310027 P.R. China School of Electrical Engineering and Computer Science University of Newcastle Callaghan NSW 2308 Australia

ISBN: (纸本)9781467360890

This paper proposes a simple, distributed control protocol for multi-agent systems with relative sensing capability over a directed network to achieve an affine formation. In contrast to the linear consensus protocol, the control protocol in this paper takes both positive and negative weights that partially encode the target formation shape and is thus able to achieve a formation pattern rather than just consensus. Having possibly negative weights in a graph, the associated Laplacian is called the generalized Laplacian. The connection between the generic rank property of the generalized Laplacian and the connectivity of a directed graph is established, based on which a necessary and sufficient graphical condition is developed to ensure the emergence of an affine formation by the proposed distributed control protocol.

关键词： Laplace equations Eigenvalues and eigenfunctions Vectors Nickel Protocols Multi-agent systems Aerospace electronics

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Pedestrian-Vehicular Collision Avoidance Based on Vision System

Pedestrian-Vehicular Collision Avoidance Based on Vision Sys...

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17th International IEEE Conference on Intelligent Transportation Systems & The Asia-Pacific Council on Systems Engineering Conference 2014

作者： Zhijun Chen Chaozhong Wu Nengchao Lyu Gang Liu Yi He Intelligent Transport Systems Research Center Wuhan University of Technology Engineering Research Center for Transportation Safety Ministry of Education Beijing Key Laboratory for Cooperative Vehicle Infrastructure Systems and Safety Control School of Computer Science and Technology Wuhan University of Technology

Vehicle-pedestrian collision avoidance is an important issue on intelligent vehicles research *** pedestrian detection and collision avoidance were concentrated by previously many studies,there are many problems about the collision prediction and *** on pedestrian detection,the trajectory prediction and time to collision(TTC) still needs to be further studied to prevent vehicle-pedestrian *** this study,a monocular camera with low cost was *** well performance of pedestrian detection was *** on this detection system,a model of pedestrian trajectory prediction was ***,the extended Kalman filter was used to predict motion of *** on trajectory prediction,time to collision range(TTCR) was proposed identify three levels risks,including safe,potential collision and *** this study,the on-road experiments were conducted to validate the proposed *** experimental result shows that the TTCR is more reasonable and safe to apply in vehicle-pedestrian collision avoidance.

关键词： Pedestrian detection,pedestrian safety,time to collision range(TTCR),extended Kalman filter

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On Infinite Time Performance of Nonlinear Model Predictive controllers

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IFAC Proceedings Volumes 2014年第3期47卷 1916-1921页

作者： Xin Cai Shaoyuan Li Ning Li Kang Li Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education Shanghai 200240 P. R. China School of Electronics Electrical Engineering and Computer Science The Queen's University Belfast Belfast BT7 1NN UK

This paper addresses the problem of infinite time performance of model predictive controllers applied to constrained nonlinear systems. The total performance is compared with a finite horizon optimal cost to reveal performance limits of closed-loop model predictive control systems. Based on the Principle of Optimality, an upper and a lower bound of the ratio between the total performance and the finite horizon optimal cost are obtained explicitly expressed by the optimization horizon. The results also illustrate, from viewpoint of performance, how model predictive controllers approaches to infinite optimal controllers as the optimization horizon increases.

关键词： Model Predictive control Finite Horizon Optimal control Value Iteration Principle of Optimality

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Stochastic Bounded Real Lemma for Switched Stochastic Systems with Average Dwell Time

Stochastic Bounded Real Lemma for Switched Stochastic System...

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IEEE Annual Conference on Decision and control

作者： Hongji Ma Yingmin Jia Junping Du Fumitoshi Matsuno Department of Systems and Control LIMB Beihang University (BUAA) Beijing 100191 China Department of Systems and Control Beihang University (BUAA) Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China Department of Mechanical Engineering and Science Graduate School of Engineering Kyoto University Kyoto 615-8540 Japan

ISBN: (纸本)9781467360890

This paper addresses the H_∞ performance and H_∞ control of switched stochastic linear systems subject to average dwell-time switching. At first, a sufficient condition is presented to guarantee the switched stochastic system to achieve a weighted H_∞ performance under the condition that all subsystems are asymptotic mean square stable. Further, the disturbance attenuation property of the considered systems is investigated when both stable and unstable subsystems are included. It is shown that if the active time of unstable subsystems is properly allocated, a stochastic bounded real lemma (SBRL) can be established based on the solvability of linear matrix inequalities (LMIs). As an application of the obtained SBRL, the robust control problem is settled for a class of switched stochastic systems with (x,u,v)-dependent noises, and the state-feedback H_∞ controller is developed.

关键词： dwell time stochastic systems SUB-SYSTEM attenuation characteristic Stochastic Lemma effective time Bounded computability controllers

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Continuous-variable measurement-device-independent quantum key distribution

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Physical Review A 2014年第5期89卷 052301-052301页

作者： Zhengyu Li Yi-Chen Zhang Feihu Xu Xiang Peng Hong Guo State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science and Center for Quantum Information Technology Peking University Beijing 100871 China Center for Computational Science and Engineering Peking University Beijing 100871 China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing 100876 China Centre for Quantum Information and Quantum Control Department of Physics and Department of Electrical and Computer Engineering University of Toronto Toronto Ontario Canada M5S 3G4

We propose a continuous-variable measurement-device-independent quantum key distribution (CV-MDI QKD) protocol, in which detection is conducted by an untrusted third party. Our protocol can defend all detector side channels, which seriously threaten the security of a practical CV QKD system. Its security analysis against arbitrary collective attacks is derived based on the fact that the entanglement-based scheme of CV-MDI QKD is equivalent to the conventional CV QKD with coherent states and heterodyne detection. We find that the maximal total transmission distance is achieved by setting the untrusted third party close to one of the legitimate users. Furthermore, an alternate detection scheme, a special application of CV-MDI QKD, is proposed to enhance the security of the standard CV QKD system.

关键词： QUANTUM theory QUANTUM mechanics QUANTUM entanglement QUANTUM coherence HETERODYNE detection QUANTUM fluctuations

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Adaptive Sliding Mode control for TCP Networks with Input Saturation

Adaptive Sliding Mode Control for TCP Networks with Input Sa...

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第25届中国控制与决策会议

作者： Chengyin Ye Yuanwei Jing Junxia Chu School of Information Science and Engineering Northeastern University School of Computer and Communication Engineering Liaoning Shihua University School of Information and Control Engineering Liaoning Shihua University

ISBN: (纸本)9781467355339

For the congestion control of the transmission control protocol （TCP） networks in presence of input saturation and the lumped uncertainty, an active queue management algorithm is proposed based on adaptive sliding mode control. One adaptive law is designed to estimate the lumped uncertainty such that the need for knowing the bound in advance is eliminated. The other adaptive law is proposed to ensure the system stabilty considering the TCP networks subjected to input saturation. Using these adaptive laws, an adaptive sliding mode controller is presented to guarantee asymptotic convergence and robustness against the lumped uncertainty. Numerical simulations are performed to show that the proposed scheme is effective in various network scenarios.

关键词： Congestion control TCP Networks Input Saturation Adaptive Sliding Mode control

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