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International Conference on Intelligent Transportation

作者： Xiaomeng Shu Li Zhu Hongli Zhao Tao Tang School of Electrical and Information Engineering Beijing Jiaotong University State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University National Engineering Research Center of Rail Transportation Operation and Control System Beijing Jiaotong University

ISBN: (纸本)9781479960798

Communication Based Train control (CBTC) system is a kind of advanced train automatic control system that integrates radio communication and automation control technology. Handoff happens frequently in CBTC train ground communication system, which may result in communication interrupt and long latency. In this paper, we propose a new handoff decision algorithm based on improved Grey Verhulst model for the Time Division-Long Term Evolution (TD-LTE) based train-ground communication system. The proposed handoff decision algorithm can be used under free space and leaky coaxial cable equipped environment. Improved Grey Verhulst model is used to predict the Reference Signal Receiving Power (RSRP) values from two Radio Remote Units (RRU). Compared with traditional Verhulst model, improved Grey Verhulst model can optimize parameters to eliminate the inherent errors in data sequence prediction. The handoff decision action is performed based on the predicted RSRP values. Simulation results show that the proposed handoff decision algorithm can decrease ping-pong handoff and improve the handoff delay compared with the traditional A3 event based scheme in LTE systems.

关键词： Prediction algorithms Predictive models Rail transportation Handover Coaxial cables

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Block-Based Salient Region Detection Using a New Spatial-Spectral-Domain Contrast Measure

Block-Based Salient Region Detection Using a New Spatial-Spe...

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IEEE International Symposium on Multimedia

作者： Nan Mu Xin Xu Li Chen Jing Tian Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System Wuhan University of Science and Technology Wuhan China School of Computer Science and Technology Wuhan University of Science and Technology Wuhan China

ISBN: (纸本)9781479943104

Visual saliency is an important cue in human visual system, it can identify salient region in image. Image contrast has been utilized as an effective feature to detect the salient region. The conventional contrast measures utilize both spectral and spatial properties of image in many salient region detection methods. However, they only consider the local characteristics of image region, consequently, the global characteristics are neglected. This paper presented a new contrast measure by exploiting both local and global characteristics of image regions. Furthermore, the proposed measure is utilized to perform salient region detection in image. Experiments are conducted on the MSRA test database to compare the performance of the proposed approach with the state-of-the-art salient region detection algorithms.

关键词： Spectral analysis Computer vision Visualization Computational modeling Pattern recognition Databases Image color analysis

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Modal Analysis of a Tooth-PDL-Bone Complex

Modal Analysis of a Tooth-PDL-Bone Complex

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2014 4th IEEE International Conference on information Science and Technology

作者： Zaijin Li Yangzhou Gan Jing Xiong Jiali Tan Zeyang Xia Qunfei Zhao Harbin Institute of Technology Shenzhen Graduate School Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences and The Chinese University of Hong Kong Guanghua School of Stomatology Hospital of Stomatology Sun Yat-Sen University and Guangdong Provincial Key Laboratory of Stomatology

Introduction: Previous studies have shown that applying external vibrational load of a certain frequency and intensity can accelerate the tooth movement, thus shorten orthodontic treatment time. It is believed that the optimal frequency is correlative to the modal mode of the target toothperiodontal ligament(PDL)-bone complex(TPBC). This study aims to investigate modal mode, natural frequencies included,of the TPBC using finite element(FE) method. Methods: A three dimensional TPBC model of a maxillary central incisor were reconstructed from cone beam CT images. A FE model was then created in Ansys 14.5. The tooth, PDL, and bone were meshed with 10-node hexahedral elements(SOLID 187)with the numbers of the elements equaled to 17,803, 4,137,and 32,577, respectively. All parts were considered homogeneous and isotropic. The material properties(Young's Module(Pa),Poisson's ratio and Density(kg/m3) as: 2e10, 0.31 and 1.36e3 for tooth, 4.7e5, 0.4 and 1.1e3 for PDL, and 3.5e9, 0.33 and 1.4e3 for bone, respectively. Fixed constraint was set for the alveolar bone. PCG Lanczos method was used in the modal *** order modes were included in the computation. Result:The first six order modal mode of the TPBC were *** corresponding natural frequencies were 702, 1049, 2713,2805, 3026, and 3530 Hz, respectively. Different tooth movement patterns, including translation, rotation, extrusion/intrusion,were observed in these modal modes. Conclusion: The proposed method is able to obtain the natural frequencies and modal modes of a TPBC. The results can be used as reference for developing vibrational device to accelerate orthodontic tooth movement.

关键词： Modal Analysis of a Tooth-PDL-Bone Complex PDL

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Further Results on the Maximal Contractively Invariant Ellipsoid of Discrete-time Linear systems with Multiple Inputs Subject to Actuator Saturation

Further Results on the Maximal Contractively Invariant Ellip...

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IEEE Annual Conference on Decision and control

作者： Yuanlong Li Zongli Lin Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing of Ministry of Education Shanghai 200240 China Charles L. Brown Department of Electrical and Computer Engineering University of Virginia P.O. Box 400743 Charlottesville VA 22904-4743 USA

ISBN: (纸本)9781467360890

Contractively invariant ellipsoids have been extensively used as estimates of the domain of attraction of a linear system under a saturated linear feedback. For a discrete-time linear system with a single input subject to actuator saturation, based on a convex hull representation of the saturated linear feedback, a necessary and sufficient condition for an ellipsoid to be contractively invariant was previously established. Based on this condition, the determination of the maximal contractively invariant ellipsoid can be formulated and solved as an LMI problem. In this paper, we develop a criterion to determine if a contractively invariant ellipsoid is the maximal one for discrete-time saturated linear systems with multiple inputs. This criterion is based on the solution of an LMI problem, which involves a generalized convex hull representation of saturated linear feedbacks, and includes the existing result for discrete-time saturated linear systems with a single input as a special case. Simulation results demonstrate the effectiveness of our results.

关键词： Linear system multi-input discrete-time Invariant discrete time systems linear feedback Saturated convex hull region of attraction

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Distributed differential evolution algorithm with adaptive parameters

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Kongzhi yu Juece/control and Decision 2014年第4期29卷 701-706页

作者： Zhang, Chun-Mei Chen, Jie Xin, Bin School of Automation Ministry of Education Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing Institute of Technology Beijing 100081 China School of Electronic Information Engineering Taiyuan University of Science and Technology Taiyuan 030024 China

An adaptive distributed differential evolution algorithm is proposed based on the change of the individual's fitness value. Firstly, the initial population is divided into several subpopulations. When the migration condition is satisfied, the best individual in each subpopulation will replace the worst individual of its neighbor subpopulations according to the Von Neumann topology. The migration mechanism among subpopulations enables the information to be communicated in the whole population. Meanwhile, the adaptive mechanism of F and CR is presented for assigning different F and CR to each individual according to the individual's fitness. Numerical results show that, the proposed algorithm is beneficial to explore the solution space, which can avoid the premature convergence and search the excellent solutions.

关键词： Optimization

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Two-degree-of-freedom controller Design for MIMO systems with Multiple Time Delays Based on Inversing Decoupling

Two-degree-of-freedom Controller Design for MIMO Systems wit...

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第三十二届中国控制会议

作者： ZHANG Wei SUN Boi ZHANG Xi ZHANG Weidongi Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University Guangdong power grid corporation

ISBN: (纸本)9781479900305

In this paper,a two-degree-of-freedom(TDOF) controller design method for multi-inputs multi-outputs(MIMO) system with multiple time delays based on inversing decoupling is ***,an inversing decoupling method based on the factorization of the plant is ***,the H2 optimal controller design method is applied to the decoupled single-input/single-output(SISO) system after the system has been ***,a TDOF controller is designed for the decoupled closed-loop *** with other developed methods,the proposed design method has two main advantages. One is that the design procedure is simple and the obtained controllers are given in analytical *** other is that better performance can be achieved since the TDOF control structure can isolate the disturbance from the *** are provided to illustrate the effectiveness of the proposed design approach.

关键词： TDOF MIMO multiple time delays inverse decoupling H2 optimal control

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LBP-based hierarchical sparse patch learning for face recognition

LBP-based hierarchical sparse patch learning for face recogn...

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2013 International Conference on Image processing, Computer Vision, and Pattern Recognition, IPCV 2013, at WORLDCOMP 2013

作者： Zhao, Yue Su, Jianbo Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education Shanghai200240 China

ISBN: (纸本)1601322534

Local Binary Pattern (LBP) features and its variants are computed on the patches with the fixed positions and a fixed size in images, while the limited variety of the size and position cannot accurately measure the nature of face image. In this paper, we propose a new learning method, Hierarchical Sparse Patch Learning (HSPL), to select face patches with different positions and sizes for face recognition. HSPL employs a sparse learning model to hierarchically select patches at two levels: in level 1 the optimal patch candidates are figured out, while in level 2 the optimal patches from the candidates are obtained. LBP features are extracted from the optimal patches to recognize faces. Experimental results show that the proposed method is more efficient and achieves higher recognition rate than the other two compared methods. © 2013 CSREA Press. All rights reserved.

关键词： Local binary pattern

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Adaptive tracking of parametric strict-feedback nonlinear systems in the presence of additive disturbance

Adaptive tracking of parametric strict-feedback nonlinear sy...

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第三十二届中国控制会议

作者： WANG Yanxia ZHANG Zhengqiang Rizhao Campus Qufu Normal University School of Electrical Engineering and Automation Qufu Normal University Key Laboratory of System Control and Information Processing Ministry of Education

ISBN: (纸本)9781479900305

In this paper,we consider the same class of systems in a previous paper,i.e.a class of parametric strict-feedback nonlinear systems with additive *** using the backstepping technique,adaptive control algorithm is developed. Unlike the exiting control schemes for systems with additive disturbance,no knowledge is assumed on two time continuous differentiability of the ***,the developed backstepping controller does not require that the uncertain parameters is restricted within a known ***,overestimation of the system parameters is removed by employing the tuning functions *** is shown that the proposed controller not only guarantees global stability,but also asymptotic tracking.

关键词： Adaptive control Nonlinear system Backstepping Asymptotic tracking Disturbance

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Optimization for family energy consumption in real-time pricing environment

Optimization for family energy consumption in real-time pric...

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2012 International Conference on Emerging Technologies for information systems, Computing, and Management, ICM 2012

作者： Wu, Weipo Yang, Genke Pan, Changchun Ju, Changjiang Department of Automation and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9781461470090

In order to help consumers adapt to electricity consumption in real-time electricity pricing environment, an energy consumption scheme is proposed in this paper. This scheme focuses on the prediction, modeling and optimization for family energy consumption. A method based on support-vector machine (SVM) is used to predict the real-time price (RTP) and the optimization model divides every hour into equal time slots and thus provides more opportunities to schedule household appliances in proper working time. Then the simulation results show that the proposed optimal control model reduces the daily electricity expenditures. © 2013 Springer Science+Business Media New York.

关键词： Costs

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Anti-windup Design for Active Disturbance Rejection control

Anti-windup Design for Active Disturbance Rejection Control

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第三十三届中国控制会议

作者： Xiongjun Wu Jiaoni Pang Tao Yang The 802 Institute of Shanghai Academy of Space Flight Technology The Eighth Academy of China Aerospace Science and Technology Corporation Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information ProcessingMinistry of Education of China ACCESS Linnaeus Centre School of Electrical Engineering Royal Institute of Technology

ISBN: (纸本)9781479947249

An anti-windup compensate algorithm for active disturbance rejection mechanism is proposed in this paper. This paradigm extends the traditional anti-windup scheme to the Active Disturbance Rejection control(ADRC) mechanism, to deal with the input saturation nonlinearity and meanwhile reject the disturbance automatically by using Extended State Observer(ESO). The output of anti-windup compensator is treated as a part of unknown disturbances and is introduced into the ESO, which can online observe both internal and external disturbances(parameter uncertainties and model mismatches). The controller input is yielded by using a nonlinear feedback combination, and it is used to compensate the integrator windup caused by the saturation nonlinearity element. On the other hand, in order to determine the parameters of the ESO and the anti-windup compensator feedback gain, the L2 gain is adopted. The effectiveness and the robustness against model and parameter uncertainties of the proposed method is verified by an example of the seeker platform.

关键词： Actuator saturation,Anti-windup design,Active disturbance rejection,Extended State Observer(ESO),Tracking Differentiator

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