检索结果-内蒙古大学图书馆

18th International Conference on Pattern Recognition, ICPR 2006

作者： Quan, Zhong-Hua Xia, O-Lei Huang, De-Shuang Lyu, Michael R. Lok, Tat-Ming Intelligent Computing Lab. Hefei Institute of Intelligent Machines CAS Department of Automation University of Science and Technology of China Hefei Anhui 230031 China Intelligent Computing Lab. Hefei Institute of Intelligent Machines CAS Hefei Anhui 230031 China Computer Science and Engineering Dept. Chinese University of Hong Kong Information Engineering Dept. Chinese University of Hong Kong

ISBN: (纸本)0769525210

In this paper, an online signature verification scheme based on spectrum analysis and Mahalanobis decision is proposed. We firstly divided signatures to a number of frames with variable widths according to the characteristics of the time sequences, and then employed the Fast Fourier transformation(FFT) to extract the spectrum of signatures. The distance between the Fourier coefficient within the corresponding frames is computed, and the Mahalanobis decision making is employed. Experimentation demonstrates that spectrum analysis based on windows with variable widths is effective for online signature signals. © 2006 IEEE.

关键词： Electronic document identification systems

来源：评论

学校读者我要写书评

暂无评论

An Evolutionary Support Vector Machines Classifier for Pedestrian Detection

An Evolutionary Support Vector Machines Classifier for Pedes...

引用

2006 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： D. Chen X.b. Cao Y.w. Xu H. Qiao Department of Computer Science and Technology University of Science and Technology Hefei China Anhui Province Key Laboratory Software Computing and Communication Hefei China Institute of Automation Chinese Academy and Sciences Beijing China

In a pedestrian detection system, a classifier is usually designed to recognize whether a candidate is a pedestrian. Support vector machines (SVM) has become a primary technique to train a classifier for pedestrian detection. However, it is hard to give the best training model which has a tremendous effect to the performance of a SVM classifier. In this paper, we design special code/decode scheme and evaluation function for a training model firstly; and then use genetic algorithm to optimize key parameters which represent the SVM training model. Therefore a most suitable SVM classifier can be obtained for pedestrian detection. Experiments have been carried out in a single camera based pedestrian detection system. The results show that the evolutionary SVM classifier has a better detection rate; moreover, RBF kernel is more suitable than polynomial kernel when chosen in an evolutionary SVM classifier for pedestrian detection

关键词： Support vector machines Support vector machine classification Kernel Genetic algorithms Decoding Design optimization Cameras Intelligent robots computer science Laboratories

来源：评论

学校读者我要写书评

暂无评论

Stability Analysis of PWM-Controlled Dual Channel Resonant Buck&Boost Converter Using PI Controller

Stability Analysis of PWM-Controlled Dual Channel Resonant B...

引用

International (EPE-PEMC) Power Electronics and Motion Control Conference

作者： Balazs Buti Istvan Nagy Eisuke Masada Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary Science University of Tokyo Tokyo Japan

The paper is concerned with the stability analysis of a feedback controlled resonant dual channel buck&boost converter. The output voltage is controlled by using constant frequency PWM and PI controller. The analysis is based on the eigenvalues of the Jacobian matrix of the Poincaré Map Function (PMF). After small perturbation determining the deviations of the state variables from the periodic trajectory, the Jacobian matrix is calculated without the need to determine the PMF itself. The introduction of the so-called auxiliary state vector greatly facilitates the calculation. Calculation and simulation results included helps the design of the control loop.

关键词： Stability analysis Pulse width modulation Pulse width modulation converters Resonance Switches Sampling methods Jacobian matrices Circuits Periodic structures Steady-state

来源：评论

学校读者我要写书评

暂无评论

Factors influencing on flux distribution on focal region of parabolic concentrators

引用

Journal of Physics: Conference Series 2006年第1期48卷 59-63页

作者： Liu, Y. Dai, J.M. Sun, X.G. Yu, T.H. Department of Automation Measurement and Control Harbin Institute of Technology Heilongjiang Harbin 150001 China Computer Centre Harbin University of Science and Technology Heilongjiang Harbin 150001 China

The random surface error, tracking error, position error and shadow of receiver of parabolic dish concentrators are analysed by using the ray tracing and the Monte-Carlo method. Several examples are given. The analysis is help to optimizing the system efficiency and measuring the flux density distribution. © 2006 IOP Publishing Ltd.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Approximate radical of ideals with clusters of roots 06

Approximate radical of ideals with clusters of roots

引用

International Symposium on Symbolic and Algebraic Computation, ISSAC 2006

作者： Janovitz-Freireich, Itnuit Rónyai, Lajos Szántó, Ágnes North Carolina State University Campus Box 8205 Raleigh NC 27695 United States MTA SZTAKI Lágymaányosi u. 11 1111 Budapest Hungary North Carolina State University Department of Mathematics United States Computer and Automation Institute Hungarian Academy of Sciences Budapest University of Technology and Economics Hungary

ISBN: (纸本)1595932763

We present a method based on Dickson's lemma to compute the "approximate radical" of a zero dimensional ideal I in ℂ[x 1 , . . . , xm] which has zero clusters: the approximate radical ideal has exactly one root in each cluster for sufficiently small clusters. Our method is "global" in the sense that it does not require any local approximation of the zero clusters: it reduces the problem to the computation of the numerical nullspace of the so called "matrix of traces", a matrix computable from the generating polynomials of Ĩ. To compute the numerical nullspace of the matrix of traces we propose to use Gauss elimination with pivoting, and we prove that if Ĩ has k distinct zero clusters each of radius at most s in the ∞-norm, then k steps of Gauss elimination on the matrix of traces yields a submatrix with all entries asymptotically equal to Ε2. We also prove that the computed approximate radical has one root in each cluster with coordinates which are the arithmetic mean of the cluster, up to an error term asymptotically equal to 2. In the univariate case our method gives an alternative to known approximate square-free factorization algorithms which is simpler and its accuracy is better understood. Copyright 2006 ACM.

关键词： Matrix algebra

来源：评论

学校读者我要写书评

暂无评论

SYSTEM DESIGNING FOR A SMALL-SCALE AUTONOMOUS HELICOPTER

引用

International Journal of Information Acquisition 2006年第4期3卷 359-367页

作者： WENBING CHEN MING LIU YUNJIAN GE Institute of Intelligent Machines Chinese Academy of Sciences Department of Automation University of Science and Technology of China Hefei Anhui China Department of Electrical and Computer Systems Engineering Monash University Melbourne Australia Institute of Intelligent Machines Chinese Academy of Sciences Hefei Anhui China

This paper presents the design of a relative low-cost and more compatible autonomous helicopter system using HIROBO 50 scale as an experimental platform. Because of the limit of helicopter payload, we choose the MP2128 Autopilot and a number of sensors to build the system and the weight of instrumentation is about 500 g, much less than the payload capability of model helicopter. Thus it is feasible to design the binocular stereo-camera system to achieve full autonomous flight and the whole weight (include power) of instrumentation is about 1500 g. After getting the model of the helicopter using the subspace model identification (SMI) algorithms, we present the structure of fuzzy PID controller.

关键词： Helicopter MP2128 MOESP Fuzzy PID controller

来源：评论

学校读者我要写书评

暂无评论

Multitarget Tracking Applications of the Bi-i Platform: Attention-selection, Tracking and Navigation

Multitarget Tracking Applications of the Bi-i Platform: Atte...

引用

IEEE International Workshop on Cellular Nanoscale Networks and their Applications, (CNNA)

作者： Gergely Timar Csaba Rekeczky Analogic and Neural Computing Systems Laboratory of the Computer and Automation Institute of the Hungarian Academy of Sciences Budapest Hungary Information Technology Department Pazmany Peter Catholic University Budapest Hungary

A multitarget tracking framework implemented on the Bi-i platform is presented. The demonstration applications include a target tracking system with laser actuation, an attention-selection algorithm and a laser dot de... 详细信息

关键词： Navigation Target tracking Cellular neural networks Application software computer networks Laser theory Circuits and systems Circuit testing Laboratories automation

来源：评论

学校读者我要写书评

暂无评论

Automated Vehicles' Work Planning in Flexible Manufacturing Systems

Automated Vehicles' Work Planning in Flexible Manufacturing ...

引用

International Conference on Emerging Technologies and Factory automation (ETFA)

作者： Wojciech Muszynski Zbigniew Banaszak Izabela Tomczuk-Pirog Institute of Computer Science Automation and Robotics Wroclaw University of Technology Wroclaw Poland Department of Computer Science and Management Technical University Koszalin Koszalin Poland Department of Management and Production Engineering Technical University of Opole Opole Poland

The problem of rules setting in coordination of automated vehicles access to shared system resources (sections of their transportation paths) which assure a deadlock free and starvation free flow of the executed processes belongs to NP-hard problems. Assuming that there are local (controlling access to shared resources) rules of priority dispatching, the problem deals with setting conditions sufficient for a pair (initial state, set of priority dispatching rules). The assumed knowledge base way of specifying a transportation subsystem leads to solving a logic-algebraic method decision problem. In this regard, the working knowledge representation synthesis method constitutes a significant contribution to the development of programming methods aimed at distributed control procedures design.

关键词： Vehicles Flexible manufacturing systems Transportation Knowledge representation Dispatching Logic computer science Robotics and automation System recovery Control system synthesis

来源：评论

学校读者我要写书评

暂无评论

A NEW HYBRID WAVELET-KALMAN FILTER METHOD FOR THE ESTIMATION OF DYNAMIC SYSTEM

引用

Journal of Electronics(China) 2006年第1期23卷 139-143页

作者： Wen Chenglin Xie Jin Zhou Funa Wen Chuanbo School of Automation Hangzhou Dianzi University Hangzhou 310018 China School of Computer ＆ Information Engineering Henan University Kaifeng 475001China Dept of Accounting Guangdong Vocational Institute of Science and Technology Guangzhou 510640 China

A new hybrid wavelet-Kalman filter method for the estimation of dynamic system is developed, Using this method, the real-time multiscale estimation of the dynamic system is implemented, and the observation equation established is for the object signal itself rather than its wavelet decomposition. The simulation results show that this method can be used to estimate the object's state of the stacked system, which is the foundation of multiscale data fusion; besides the performance of the new algorithm developed in the letter is almost optimal.

关键词： Real-time Multiscale estimation Dynamic system Wavelet transform Kalman filter

来源：评论

学校读者我要写书评

暂无评论

Tracking Trajectory Planning of Space Manipulator for Capturing Uncontrolled Spinning Satellite

Tracking Trajectory Planning of Space Manipulator for Captur...

引用

IEEE International Conference on Mechatronics and automation

作者： Panfeng Huang Jie Yan Yangsheng Xu Wenfu Xu Bin Liang College of Astronautics Northwestern Polytechnical University Xi'an China Automation and Computer-Aided Engineering Chinese University of Hong Kong Hong Kong China Shenzhen Space Technology Center Harbin Institute of Technology Shenzhen China

On-orbit rescuing uncontrolled spinning satellite (USS) using space robot is a great challenge for future space service. The paper mainly presents a trajectory planning method of space manipulator that can track, approach and catch the USS in free-floating situation. According to the motion characteristics of USS, we plan a spiral ascending trajectory for space manipulator to approach towards USS in Cartesian space. However, it is difficult to map this trajectory into the joint space and realize feasible motion in joint space because of kinematic multi-solutions and dynamic singularities of space robot system. Therefore, we utilize an interval algorithm to handle these difficulties. The simulation study verifies that the spiral ascending trajectory can been realized. Moreover, the motion of manipulator is smooth and stable, the disturbance to the base is so limited that the attitude control can compensate it

关键词： Trajectory Spinning Satellites Space technology Orbital robotics Manipulators Space missions Robotics and automation Space shuttles Motion planning

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：