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2011 International Conference on Advanced Power System Automation and Protection, APAP 2011

作者： Liu, Kun Dong, Xinzhou Wang, Bin Shi, Shenxing State Key Lab. of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing 100084 China

ISBN: (纸本)9781424496198

This paper analyzes the general process of power flow transferring and divides it into four parts: 1) the process of first phase selection after fault occurs;2) the process of selective action at the first time;3) the process of second phase selection and status confirmation;4) the process after status confirmation. It points out that the issue of asymmetrical flow transferring is a critical process which must be put emphasis on. Then it proposes a method to identify this process, and discuss different solution methods. © 2011 IEEE.

关键词： Electric load flow

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Stochastic charging management for plug-in electric vehicles in smart microgrids fueled by renewable energy sources

Stochastic charging management for plug-in electric vehicles...

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2011 1st IEEE Online Conference on Green Communications, GreenCom'11

作者： Zhu, Li Yu, F. Richard Ning, Bin Tang, Tao Department of Systems and Computer Eng. Carleton University Ottawa ON Canada State Key Lab. of Rail Traffic Control and Safety Beijing Jiaotong University China

ISBN: (纸本)9781424495191

Charging electric vehicles (EVs) from smart microgrids fueled by renewable energy resources is becoming a popular green approach. Although some works have been done about renewable energy sources and EVs in smart microgrids, the stochastic characteristics and the dynamic interplay between these two important green solutions should be carefully considered. Furthermore, one of the important performance metrics, service availab.lity for EVs, is largely ignored in the existing works. In this paper, we study the charging policies in smart microgrids with EVs and renewable energy sources. We analyze service availab.lity under different charging policies. Numerical results are presented to show the performance of different charging policies. © 2011 IEEE.

关键词： Renewable energy resources

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Study on non-invasive assessment of arterial stiffness

Study on non-invasive assessment of arterial stiffness

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IEEE 2011 10th International Conference on Electronic Measurement and Instruments, ICEMI 2011

作者： Zhao, Xueling Liu, Jin Joint Lab. of Information Sensing and Intelligent Control Tianjin University of Technology and Education Tianjin 300222 China State Key Laboratory of Precision Measuring Technology and Instruments Tianjin University Tianjin 300072 China

ISBN: (纸本)9781424481590

Arterial stiffness is an effective parameter for monitoring sub-clinical arterial stiffness, and can tell effectively the cardioArterial health condition of human body. Elastic expansion coefficient of blood vessel (named as ETK) denotes the degree of arterial elastic expansion during systolic ejection, usually used to calculate other cardiovascular parameters as the intermediate variable. A new method is proposed to estimate directly the arteriosclerotic degree with ETK, and a non-invasive monitor for blood pressure and arterial stiffness is developed. Clinical experiment results show that the correlation coefficient between ETK and results of clinical ultrasound system is 0.76, which proves the validity of the method. © 2011 IEEE.

关键词： Blood vessels

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Real-time image smoothing based on true edges

Real-time image smoothing based on true edges

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12th International Conference on Computer-Aided Design and Computer Graphics, CAD/Graphics 2011

作者： Li, Xujie Zhao, Hanli Jin, Xiaogang Qin, Xiaochun Intelligent Information Systems Institute Wenzhou University Wenzhou 325035 China State Key Lab. of CAD and CG Zhejiang University Hangzhou 310058 China Wenzhou Ouhai Secondary Vocational School Wenzhou 325005 China

ISBN: (纸本)9780769544977

are as close as possible to the center of true edges. This gives us an opportunity to judge how well edges are preserved for an edge-preserving smoothing filter. We therefore propose a nonlinear edge-preserving interpolation technique guided by the Canny true edges in an image. Our new edge-preserving smoothing algorithm smoothes high-contrast details and, at the same time, effectively preserves the true edges in the input image. In order to achieve a real-time performance, we further implement the algorithm using NVIDIA CUDA by taking advantage of the high parallelism of modern graphics hardware. The proposed algorithm smoothes low-contrast regions while effectively preserving true edges, and can also be used to produce vivid abstracted effects from realistic photographs. © 2011 IEEE.

关键词： Edge detection

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A constructive procedure based on dynamic scaling for adaptive control of nonlinearly parameterized nonlinear systems

A constructive procedure based on dynamic scaling for adapti...

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作者： Liu, Xiangbin Ortega, Romeo Su, Hongye Chu, Jian Advanced Control Systems Laboratory School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 China Laboratoire des Signaux et Systèmes CNRS SUPELEC 91192 Gif-sur-Yvette France State Key Lab. of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China

ISBN: (纸本)9783902661937

A new framework to design immersion and invariance adaptive controllers for nonlinearly parameterized, nonlinear systems was recently proposed by the authors. The key step is the construction of a monotone mapping, via a suitable selection of a controller tuning function, which has to satisfy some integrability conditions|this translates into the need to solve a partial differential equation (PDE). In this paper this result is extended providing some answers to the questions of characterization of "monotonizable" systems and solvability of the PDE. First, adding to the design a nonlinear dynamic scaling, we obviate the need to solve the PDE. Second, for the case of factorizable nonlinearities, the following results are established. (i) It is shown that the monotonicity condition is satisfied if a linear matrix inequality is feasible. (ii) Directly verifiable involutivity conditions that ensure the solution of the PDE are presented. (iii) An explicit formula for the required tuning function is given, provided the regressor matrix satisfies some rank conditions. Hence, adding a dynamic scaling, this yields a constructive solution to the problem. © 2011 IFAC.

关键词： Nonlinear systems

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The Design and Application of Fuzzy controller in a Novel Plasma Water Treatment System

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Procedia Environmental Sciences 2011年 10卷 1818-1822页

作者： Zhou Jianguang Zhang Liguang Research Center for Analytical Instrumentation Institute of Cyber-Systems and Control State Key Lab. of Industrial Control Technology Zhejiang University Hangzhou 310058

In water treatment engineering, pH value is one of the most important parameters for optimizing experimental results. Because pH process has serious nonlinearity and delay, it is difficult to obtain effective control for conventional PID controllers without a precise mathematical model. According to the behavior of pH in the process of water treatment, a fuzzy control approach is proposed. The fuzzy controller is simulated with the actual data, and the simulation results demonstrate that the approach is efficient and feasible. In present paper, we construct a novel water treatment system based on microwave plasma technique and TiO2 photocatalytic technique. Experimental results show that the system can enable the value of chemical oxygen demand (COD) and heavy metal ions in water up to the Standards for Drinking Water Quality (GB5749-2006), also it can effectively reduce costs when the fuzzy controller is employed.

关键词： Fuzzy controller Drinking water Plasma COD

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Implementation of non-communication protection of double circuit line systems based on integrated protection platform

Implementation of non-communication protection of double cir...

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2011 International Conference on Advanced Power System Automation and Protection, APAP 2011

作者： Hu, Xi Dong, Xinzhou Wang, Bin Shi, Shenxing Liu, Kun Li, Youyi State Key Lab. of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing 100084 China Research Ltd. Chaoyang District Beijing 100016 China

ISBN: (纸本)9781424496198

The implementation of non-communication protection of double circuit line systems based on two independent relays has disadvantages like information shareless,complex connection and lack of economic. This paper researched the implementation of non-communication protection of double circuit line systems based on one relay - the integrated protection platform. Hardware structure of the integrated protection platform is described, and software flow of non-communication protection of double circuit line systems which implemented on the integrated protection platform is also described. Large number of RTDS experiments proved that, according to various asymmetrical fault and symmetrical fault, this protection scheme has reliable and sensitive action performance. It is proved that the implement non-communication protection of double circuit line systems based on the intergrated protection platform is feasible. © 2011 IEEE.

关键词： Timing circuits

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Design and implementation of an in vivo 3-D fluorescent imaging system

Design and implementation of an in vivo 3-D fluorescent imag...

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2011 2nd International Conference on Artificial Intelligence, Management Science and Electronic Commerce, AIMSEC 2011

作者： Wang, Ying Jin, Wei Jin, Qinhan Mu, Ying State Key Lab. of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hang Zhou China

ISBN: (纸本)9781457705366

Fluorescence has been proved to be a versatile and useful tool for animal in vivo imaging. It has been used widely in biomedical research and drug discoveries. With the recent development of the technology and instruments, the 2-D imaging system has been developed to a 3-D imaging in vivo. 3-D imaging will provide researchers detailed spatial information of the targets and its relationship with animal organs. This paper introduces a new design of an in vivo 3-D multispectral fluorescent imaging system, including the design of hardware platform and the imaging algorithm based on binocular stereo vision theory. The working principle of the system, structure of the hardware and the system diagram are introduced. The algorithm of binocular stereo vision is utilized to complete camera calibration, stereo rectification, and 3D coordinates computing based on OpenCV. © 2011 IEEE.

关键词： Imaging systems

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Output feedback adaptive robust learning control of a class of nonlinear systems with periodic disturbances

Output feedback adaptive robust learning control of a class ...

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作者： Liu, Xiangbin Hou, Zhongsheng Yao, Bin Su, Hongye Sun, Mingxuan Advanced Control Systems Laboratory School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 China School of Mechanical Engineering Purdue University West Lafayette IN 47907 United States State Key Lab. of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China College of Information Engineering Zhejiang University of Technology Hangzhou 310032 China

ISBN: (纸本)9783902661937

In this paper, a discontinuous projection-based output feedback adaptive robust learning control (OARLC) scheme is constructed for a class of nonlinear systems in a semi-strict feedback form by incorporating an observer and a dynamic normalization signal. Since only output signal is availab.e for measurement, an observer is firstly designed to provide exponentially convergent estimates of the unmeasurable states. Using certain known basis functions to capture the characteristics of unknown general periodic disturbances, the discontinuous projection type adaptation law can then be used to tune the amplitudes of those basis functions on-line to recover the unknown general periodic disturbances asymptotically. The estimation errors due to the unknown initial states, uncompensated disturbances, and the uncertain nonlinearities are also effectively dealt with via certain robust feedback at each step of the proposed OARLC backstepping design. The resulting controller achieves a guaranteed transient and a prescribed final tracking accuracy for output tracking performance. In addition, when the general periodic disturbances fall within the approximation ranges of the periodic basis functions, asymptotic output tracking performance is achieved as well. © 2011 IFAC.

关键词： Feedback

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Motion vehicles tracking in intelligent transportation visual surveillance systems

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Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology 2012年第SUPPL.2期36卷 216-222页

作者： Wu, Lin-Feng Xiong, Gang Qian, Shou-Yi Xie, Li Zhejiang Provincial Key Lab. of Information Network Technology Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing 100190 China Cloud Computing Industrial Technology Innovation and Incubation Center Dongguan Research Institute of CASIA Chinese Academy of Sciences Dongguan 523808 China Wenzhou Research Institute of Electronics and Information Wenzhou 325003 China

In terms of the difficulty of vehicle tracking in complex environment of the visual surveillance system, an object tracking algorithm is proposed for the applications in practical visual surveillance systems for intelligent traffic. A block-based Gaussian mixture background modeling method for object detection is presented to reduce the computational complexity of moving vehicle object abstraction. An adaptive tracking algorithm fused with color features and texture features is described to better adapt the traffic scene variation. The experimental results show that the proposed algorithm can effectively deal with the complex urban traffic conditions and the tracking performance is better than the conventional particle filter method and single feature based non-adaptive object tracking method.

关键词： Tracking (position)

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