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2009 2nd IEEE International Conference on Broadband Network and Multimedia technology, IEEE IC-BNMT2009

作者： Jing, Yang Mai, Xu Jinfu, Xu Baoguo, Xu Lu, Hong School of Communication and Control Engineering Jiangnan University Wuxi China Electrical Engineering College Guizhou University Guiyang China Department of Electrical and Electronic Engineering Imperial College London United Kingdom Department of Electronic Engineering Huaihai Institute of Technology Lianyungang China

ISBN: (纸本)9781424450053

Wireless sensor networks (WSNs) consist of a large number of nodes with limited battery power. Thus, the communication must be designed to conserve the limited energy resources of the nodes. In this paper, we propose a cluster-based multipath delivery scheme, called CMDS, which uses cluster and multipath to improve the capability of load balance, and thus prolonging the network lifetime. Firstly, CMDS organizes the nodes into clusters so that nodes communicate information only with clusterheads and clusterheads take the task of data aggregation. Then, clusterheads transmit information to base station (sink) along multiple paths. When clusterheads or intermediate nodes choose the next hop node for forwarding data, they will use some parameters, such as the residual energy and the number of hops to sink among the neighbors, that are helpful to distribute traffic among all nodes. Simulation results show that the CMDS has great potential in efficiently distributing energy consumption and extending the network lifetime. ©2009 IEEE.

关键词： Energy utilization

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Nonlinear model predictive control of trajectory tracking for non-holonomic mobile robots with constraints

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Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (engineering and technology Edition) 2009年第1期39卷 177-181页

作者： Han, Guang-Xin Chen, Hong Ma, Miao-Miao Zhao, Hai-Yan College of Communication Engineering Jilin University Changchun 130022 China College of Information and Control Engineering Jilin Institute of Chemical Technology Jilin 132022 China

Considering the dynamic model of wheeled mobile robot with non-holonomic constraint and input saturation, quasi-infinite horizon nonlinear model predictive control of its full dynamic error system was studied. Local stabilization controller and invariant terminal region were obtained by online linearization along the nominal trajectory. Simulation results presented in term of tracking "8-shape" trajectory show better tracking performance with the satisfaction of control input constraints.

关键词： Mobile robots

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Adaptive trajectory tracking control of two-wheeled self-balance robot

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High technology Letters 2009年第1期15卷 38-43页

作者： Qin, Yong Zang, Xizhe Wang, Xiaoyu Li, Tian Zhao, Jie Robotics Institute Harbin Institute of Technology Harbin 150001 China Measure-control Technology and Communication Engineering Harbin University of Science and Technology Harbin 150080 China

Wheeled mobile robot is one of the well-known nonholonomic systems. A two-wheeled self-balance robot is taken as the research objective. This paper carried out a detailed force analysis of the robot and established a non-linear dynamics model. An adaptive tracking controller for the kinematic model of a nonholonomic mobile robot with unknown parameters is also proposed. Using control Lyapunov function (CLF), the controller's global asymptotic stability has been proven. The adaptive trajectory tracking controller decreases the disturbance in the course of tracking control and enhances the real-time control characteristics. The simulation result indicated that the wheeled mobile robot tracking can be effectively controlled. Copyright © by High technology Letters Press.

关键词： Asymptotic stability

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Robust H-infinity control for T-S fuzzy systems with time-domain hard constraints

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Kongzhi Lilun Yu Yingyong/control Theory and Applications 2009年第7期26卷 715-721页

作者： Gao, Xing-Quan Ma, Miao-Miao Chen, Hong College of Information Science and Control Engineering Jilin Institute of Chemical Technology Jilin Jilin 132022 China School of Communication Engineering Jilin University Changchun Jilin 130025 China

For uncertain Takagi-Sugeno (T-S) fuzzy systems with time-domain constraints on control inputs and states, a robust control scheme is proposed. Sufficient condition for achieving a given H-infinity performance level for the uncertain T-S fuzzy systems is given. Under the bound assumption of the disturbance energy, an ellipsoid containing all perturbed trajectories is found, and then, the time-domain hard constraints are translated into constraints in linear matrix inequalities (LMI) by using S-Procesure and double-ellipsoid method. This multi-objective design is eventually brought into solving an optimization problem with LMI constraints. Simulation of the application to an inverted pendulum is performed;and results are discussed.

关键词： Linear matrix inequalities

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The Protocol of Cluster Multi-Hop Transmission Based on Heterogeneous Wireless Sensor Networks

The Protocol of Cluster Multi-Hop Transmission Based on Hete...

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International Conference on Computational Intelligence and Software engineering (CiSE)

作者： Xuegong Qiao Fuchang Ma Yan Chen Weizhao Yao College of Information Engineering Taiyuan University of Technology Taiyuan China Institute of Measurement and Control Technology Taiyuan University of Technology Taiyuan China

The distributed routing protocol is widely used in wireless sensor networks. But it is mainly designed for homogeneous networks and also has the disadvantages of irrationality of choosing cluster head and unbalanced energy consumption of nodes. Through theoretical studies, a new protocol of the cluster multi-hop transmission (CMHT) for heterogeneous sensor networks is proposed. The algorithm selects cluster head nodes by calculating Weight-value and transfers data by using nodes in cluster and cluster-head multi-hop transmission manner. Finally, the protocol is simulated by using MATLAB. The simulation result shows that this improved protocol could suitably form clusters, better improve the energy balance of a node, and effectively prolong the survival time of the entire networks.

关键词： Wireless application protocol Spread spectrum communication Wireless sensor networks Routing protocols Educational institutions Energy consumption Power engineering and energy Data communication Clustering algorithms MATLAB

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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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The Research and Application of the Electric Capacitor Detecting Sea Ice Thickness and its Detecting System

The Research and Application of the Electric Capacitor Detec...

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IEEE Circuits and Systems International Conference on Testing and Diagnosis, ICTD

作者： Yin-Ke Dou Xiao-Min Chang Jian-Min Qin College Electric and Power Engineering Taiyuan university of technology Taiyuan China Measurement and Control Technology Institute Taiyuan university of technology Taiyuan China

This paper introduced a type of automate monitor sea-ice thickness sensor and its system .With some sampling sea water used as the medium of the metal parallel plate capacitor, the capacity of the parallel plate capacitor will be changed significantly in the freezing process from sea water into sea ice (or from solid into liquid). Based on the different characteristics of the capacitor in the different mediums such as in the air, sea water and sea ice, the contacting sensor used for detecting the thickness of sea ice layers and the water level under sea ice, and the sensor detection system, are designed respectively. Experiments prove that this method of monitoring the sea-ice thickness is an *** paper also describes the application of the system to the investigation of the Antarctic sea ice.

关键词： Capacitors Sea ice Ice thickness Capacitive sensors Sensor phenomena and characterization Sensor systems Water Computerized monitoring Sampling methods Solids

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Study of Surface Reconstruction Based on Contours of CT Image Slices

Study of Surface Reconstruction Based on Contours of CT Imag...

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International Workshop on Intelligent Systems and Applications, ISA

作者： Yudong Guan Yan Li Ying Wang Hong Zhang Information and Communication Engineering Institute Harbin Institute of Technology Harbin Heilongjiang China Institute of Drug Control Heilongjiang Provincial Institute of Drug Control Harbin Heilongjiang China

At present, there are two main types for medical CT image surface reconstruction: one is way of the slice contour, the other is voxel reconstruction, the former method is simple, easy for calculation and much classical computer graphics techniques can be used, the latter is related to complex computing. In this paper, image contours are extracted by active contour model, simplified by DP algorithm. Use Delaunnay splicing to construct triangulations for the sampled points of contours, finally surface of a human head are constructed through the surface fitting techniques.

关键词： Surface reconstruction Image reconstruction Computed tomography Surface fitting Biomedical imaging Computer graphics Active contours Splicing Humans Head

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Extensions of extremum-seeking control to improve the aerodynamic performance of axial turbomachines

Extensions of extremum-seeking control to improve the aerody...

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作者： Wiederhold, Olaf King, Rudibert Noack, Bernd Neuhaus, Lars Neise, Wolfgang Enghardt, Lars Swoboda, Marius Department of Measurement and Control Berlin Institute of Technology Berlin 10623 Germany Department of Engine Acoustics German Aerospace Center DLR Institute of Propulsion Technology Berlin 10623 Germany Design Systems Engineering Rolls-Royce Deutschland Ltd. and Co. KG Dahlewitz Brandenburg 15827 Germany Department for Fluid Dynamics and Engineering Acoustics Berlin Institute of Technology Berlin 10623 Germany

ISBN: (纸本)9781563479755

Different extremum-seeking control methods are applied to a high pressure axial fan in order to reduce flow separation and increase the pressure ratio via injection of a pulsed air stream. To improve the control performance the plain SISO-extremum controller is extended by a slope-seeker. To speed up control, a Kalman filter is applied that estimates the local gradient of the static input-output map of the process significantly faster than in the classical concept of extremum-seeking control. Due to that, control can be accelerated up to ten times. The usable range of the aerodynamic characteristic diagram can be increased and flow separation can be hold to smaller flow coefficients. Copyright © 2009 by ***, TU-Berlin, Germany.

关键词： Flow separation

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Sonar image segmentation based on implicit active contours

Sonar image segmentation based on implicit active contours

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IEEE International Conference on Intelligent Computing and Intelligent Systems (ICIS)

作者： Enfang Sang Zhengyan Shen Chang Fan Yuanshou Li Underwater Acoustics Engineering College Harbin Engineering of Technology Harbin China Department of Measurement and Control Technology China Aerodynamics Research Institute of Aeronautics Harbin China

ISBN: (纸本)9781424447374;9781424447541

Sonar images are susceptible to noise pollution and the image intensities are often inhomogeneous. So there are many difficulties in sonar image segmentation. When apply the current popular region-based active contour models to sonar image segmentation, the objects we interested may be segmented inaccurately sometimes, especially for the image with shadows. To solve the problem, a simple algorithm was proposed in this paper. Firstly we analyzed the initial contour action in level set evolution, and then combined with a strict local binary fitting energy we segmented sonar images selectively by changing the initial contour. Computer experiment results show that our method is very suitable for sonar image segmentation. Target regions with weak border can be obtained perfectly. And for the sonar image with shadows, interested objects and the shadows could be distinguished separately, avoiding the boundary leaking problems caused by the shadows' existing.

关键词： Image segmentation Active contours Level set Sonar measurements Acoustical engineering Acoustic noise Optical noise Sonar detection Underwater acoustics Educational institutions

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