检索结果-内蒙古大学图书馆

IFAC Proceedings Volumes 2009年第10期42卷 1038-1043页

作者： Alejandro J. Rojas Graham C. Goodwin Christopher P. Renton ARC Centre of Excellence for Complex Dynamic Systems and Control School of Electrical Engineering and Computer Science The University of Newcastle NSW 2308 Australia Industrial Automation Services Pty. Ltd. NSW 2284 Australia

This paper contributes to the question of how to choose estimator memory length in system identification. Traditional approaches to this problem have been based on stationary models for parameter time variations. This leads to a fixed trade-off between the “size” of parameter variations and the “size” of noise. However, in practice, one often experiences non-stationary parameter behaviour. The latter problem leads to the desirability of some form of time varying estimator memory. In particular, a short memory is desirable when rapid parameter changes occur. However, a long memory is desirable when infrequent parameters change occur so as to give maximal noise discrimination. The current paper discusses these issues at a conceptual rather than theoretical level. We illustrate the ideas by reference to parameter estimation in zinc galvanizing lines.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Uncalibrated visual servoing feedback based exponential stabilization of nonholonomic mobile robots

Uncalibrated visual servoing feedback based exponential stab...

引用

IEEE International Conference on Robotics and Biomimetics

作者： Zhenying Liang Chaoli Wang Yan Sun Yamin Yang Yunhui Liu University of Shanghai for Science and Technology Shanghai China School of Science ShanDong University of Technology China Control Science and Engineering University of Shanghai for Science and Technology Shanghai China Department of Mechanical and Automation Engineering Chinese University of Hong Kong New Territories Hong Kong China

ISBN: (纸本)9781424447749

This paper investigates visual servoing stabilization of nonholonomic moving robots with unknown camera parameters. Based on the visual servoing feedback and the common chained form of type robot, we obtain a new kind of uncertain model of nonholonomic kinemetic system firstly. Then a time varying feedback controller is proposed for exponentially stabilizing the position and orientation of the moving robot using visual feedback when the depth of the image features and the camera parameters are not known. This controller is developed based on a new formulation of the problem in the image space. The exponential stability of the closed loop system is rigorously proved. Simulation results demonstrate the effectiveness of the method proposed in this paper.

关键词： Visual servoing Feedback Mobile robots Robot vision systems Cameras Robot kinematics Robot sensing systems Partial response channels Automatic control Biomimetics

来源：评论

学校读者我要写书评

暂无评论

Study of Direction Probability and Algorithm of Improved Marriage in Honey Bees Optimization for Weapon Network System

引用

Defence Technology（防务技术） 2009年第2期5卷 152-157页

作者：杨晨光涂序彦陈杰 Systems Engineering Research Institute China State Shipbuilding Corporation Department of Automation School of Information Science and Technology Beijing Institute of Technology Ministry of Education of Key Laboratory of Complex System Intelligent Control and Decision Beijing Institute of Technology

To solve the weapon network system optimization problem against small raid objects with low attitude,the concept of direction probability and a new evaluation index system are *** calculating the whole damaging probability that changes with the defending angle,the efficiency of the whole weapon network system can be subtly *** such method,we can avoid the inconformity of the description obtained from the traditional index *** new indexes are also proposed,*** index,overlap index and cover index,which help manage the relationship among several *** normalizing the computation results with the Sigmoid function,the matching problem between the optimization algorithm and indexes is well ***,the algorithm of improved marriage in honey bees optimization that proposed in our previous work is applied to optimize the embattlement *** is carried out to show the efficiency of the proposed indexes and the optimization algorithm.

关键词：网络系统优化问题破坏概率算法改进核武器蜜蜂婚姻 Sigmoid函数

来源：评论

学校读者我要写书评

暂无评论

Image Registration Approach Based on Log-Polar and SIFT

Image Registration Approach Based on Log-Polar and SIFT

引用

Chinese Conference on Pattern Recognition (CCPR)

作者： Jian Liu Guohua Zhang Linlin Huang School of automation science and electrical engineering Beihang University Beijing China Key laboratory of national defense on fire control technology Luoyang Institute of Electro-Optial Equipment Henan China

To resolve the problem of large angle and large scale image registration, an improved approach combining log-polar and SIFT is proposed. Firstly, the log-polar technique is implemented in order to achieve the preliminary registration result as well as estimate the arbitrary rotations parameters and large scale changes. Secondly, image is segmented into sub-blocks and six candidates of sub-blocks are extracted by information entropy, where SIFT features and moment features are fused to form a new feature descriptor. Finally, registration result is calculated by the matching points obtained by measuring the Euclidean distance. The experimental results show that the proposed algorithm is robust, fast with high-precision.

关键词： Image registration Large-scale systems automation Electrical engineering Laboratories Fires Automatic control Image resolution Image segmentation Data mining

来源：评论

学校读者我要写书评

暂无评论

CORRIGENDUM: "OPTICAL AND ELECTRONIC PROPERTIES OFM2Si(M = Mg, Ca AND Sr) GROWN BY REACTIVE DEPOSITION TECHNIQUE"

引用

International Journal of Modern Physics B 2010年第23期24卷 4639-4639页

作者： JUNHUA HU AKIHIKO KATO TAIZOH SADOH YOSHUHITO MAEDA KONSTANTIN N. GALKIN TARAS V. TURCHIN NIKOLAY G. GALKIN HIROKAZU TATSUOKA Graduate School of Science and Technology Shizuoka University 3-5-1 Johoku Naka-ku Hamamatsu 432-8011 Japan FDK Corporation 2281 Washizu Kosai 431-0495 Japan Department of Electronics Kyushu University Fukuoka 819-0395 Japan Department of Energy Science and Technology Kyoto University Kyoto 606-8501 Japan Institute for Automation and Control Processes of Far Eastern Branch of Russian Academy of Science 5 Radio St. 690041 Vladivostok Russia Faculty of Engineering Shizuoka University 3-5-1 Johoku Naka-ku Hamamatsu 432-8561 Japan

来源：评论

学校读者我要写书评

暂无评论

A class of H∞ filter design for continue-time systems with time-varying delay

A class of H∞ filter design for continue-time systems with ...

引用

Asia Pacific Conference on Postgraduate Research in Microelectronics & Electronics (PrimeAsia)

作者： Jinliang Liu Xufang Xie Dong Yue The College of Information Science and Technology Donghua Uinversity Shanghai China School of Electrical and Automation Engineering Nanjing Normal University Nanjing Jiangsu China Information and Control Engineering Technology Nanjing Normal University Jiangsu China

This paper proposes a class of H ∞ filter design for continue-time systems with time-varying delay. By using the convexity property of the matrix inequality, new criteria are derived for the H ∞ performance analysis of the filtering-error systems, which can lead to much less conservative analysis results and thus reduce the overdesign of the filter. Finally, a numerical example is given to demonstrate the effectiveness and the merit of the proposed method.

关键词： Symmetric matrices Nonlinear filters Time varying systems Delay systems Performance analysis State estimation Delay effects Delay estimation Information filtering Information filters

来源：评论

学校读者我要写书评

暂无评论

Ground water level measurements using a segmented resistance sensor

Ground water level measurements using a segmented resistance...

引用

IEEE Instrumentation and Measurement Technology Conference

作者： Xianhua Yao Ying-mei Zhang Lin Gao Wuliang Yin Juan Yang Chao Wang The Institute of Measurement and Control Technology University of Technology Taiyuan Shanxi China School of Electrical Engineering and Automation Tianjin University TJU Shanxi China School of Environment and Development University of Manchester Institute of Science and Technology UK

Ground water level measurements are very important for a wide range of applications in geosciences, agriculture, environment monitoring and mining industry. Currently, reliable and automatic ground water level measurements have not been realized. This paper presents the simulation and design of a segmented resistance sensor for measuring ground water level. Based on this sensor design, we have developed an instrument that can automatically log the ground water level. Finite element simulations were performed to optimize the sensor design and to gain insight into its response. Experimental results in the lab and field have verified the usefulness of the sensor.

关键词： Level measurement Geology Agriculture Monitoring Mining industry Electrical resistance measurement Instruments Finite element methods Design optimization Performance gain

来源：评论

学校读者我要写书评

暂无评论

Frequency-domain approach to robust iterative learning controller design for uncertain time-delay systems

Frequency-domain approach to robust iterative learning contr...

引用

Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Deyuan Meng Yingmin Jia Junping Du Fashan Yu the Department of Systems and Control Beihang University (BUAA) the Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and TechnologyBeijing University of Posts and Telecommunications the School of Electrical Engineering and Automation Henan Polytechnic University

This paper deals with the robust iterative learning control(ILC) for time-delay systems(TDS) with both model and delay *** ILC algorithm with anticipation in time is considered,and a frequency-domain approach to its design is *** shows that a necessary and sufficient convergence condition can be provided in terms of three design parameters:the lead time,the learning gain,and the performance weighting *** particular,if the lead time is chosen as just the delay estimate,then the convergence condition is derived independent of the delay and the *** this case,with the selection of the performance weighting function,the perfect tracking can be achieved,or the least upper bound of the L2-norm of the limit tracking error can be guaranteed less than the least upper bound of the L2-norm of the initial tracking error.

关键词： Iterative learning control time-delay systems frequency-domain approach anticipation in time

来源：评论

学校读者我要写书评

暂无评论

Novel nonlinear L2 gain control method for doubly-fed induction motor based on port controlled Hamiltonian model

引用

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (science and Technology) 2009年第SUPPL. 1期40卷 221-228页

作者： Yang, Qian-Qian Yuan, Ming-Ting Yu, Hai-Sheng Ding, Jun-Hang School of Automation Engineering Qingdao University Qingdao 266071 China School of Control Science and Engineering Shandong University Jinan 250061 China

Applying a novel nonlinear L2 gain control method for a doubly-fed induction motor (DFIM) based on port-controlled Hamiltonian (PCH) systems, A PCH model of DFIM was established. The desired closed-loop Hamiltonian function was given. Against the load torque disturbance, L2 gain control law was designed in terms of PCH system and the L2 gain disturbances attenuation. The equilibrium stability of the system was also verified. Using SVPWM signal transformation method, speed regulation of non-salient pole SVPWM was implemented by controlling the switch point of every converter switch. The control of speed and electromagnetic-torque are tracking asymptotically when interferences exist in the surrounding environment. The simulation results show that the proposed scheme has a good performance.

关键词： Gain control

来源：评论

学校读者我要写书评

暂无评论

Gene Selection of Multiple Cancer Types via Huberized Multi-class Support Vector Machine

Gene Selection of Multiple Cancer Types via Huberized Multi-...

引用

Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Juntao Li Yingmin Jia Junping Du Fashan Yu the Department of Systems and Control Beihang University (BUAA) the Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and TechnologyBeijing University of Posts and Telecommunications the School of Electrical Engineering and Automation Henan Polytechnic University

This paper proposes a new type of regularization in the context of multi-class support vector machine for simultaneous classification and gene *** combining the huberized hinge loss function and the elastic net penalty,the proposed support vector machine can do automatic gene selection and further encourage a grouping effect in the process of building classifiers,thus leading a sparse multi-classifiers with enhanced ***,a reasonable correlation between the two regularization parameters is proposed and an efficient solution path algorithm is *** of microarray classification are performed on the leukaemia data set to verify the obtained results.

关键词： Gene selection grouping effect microarray classification solution path support vector machine(SVM)

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：