检索结果-内蒙古大学图书馆

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

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

来源：评论

学校读者我要写书评

暂无评论

A method of optical flow computation based on LUV color space

A method of optical flow computation based on LUV color spac...

引用

International Conference on Test and measurement (ICTM)

作者： Xuezhi Xiang Yu Peng Lei Zhang Department of Automatic Measurement Control Harbin Institute of Technology University Harbin China Information and Communication Engineering College Harbin Engineering University Harbin China

ISBN: (纸本)9781424446995

For improving accuracy of optical flow computation, we propose a new method to compute optical flow from both gray and color information. First, the Gauss filter is used to pre-filter the color image sequence. Then optical flow recovery is based on the method of neighborhood least squares using brightness information. And the weight coefficients of local neighborhood are determined by U and V channels in LUV color space. Finally, the optical flow result is filtered by median filter. The experiment results show that the proposed method produces dense optical flow field and accuracy of the results can also be improved.

关键词： Optical computing Image motion analysis Optical filters Brightness Equations Least squares methods Color Computer vision Fluid flow measurement Space technology

来源：评论

学校读者我要写书评

暂无评论

Nonlinear predictive control based on online support vector machine

引用

Journal of Computational Information Systems 2009年第4期5卷 1165-1170页

作者： Du, Zhiyong Wang, Xianfang Henan Mechanical and Electrical Engineering College Henan Xinxiang 453002 China Henan Institute of Science and Technology Xinxiang 453003 China School of Communication and Control Engineering Jiangnan University Wuxi 214122 China

It is difficult to build an accurate model using the traditional predictive control algorithm for a nonlinear system. Because of the nonlinearity, time variation, the control quality is not ideal. A nonlinear predictive control algorithm based on online support vector machines model was proposed. The nonlinear model of the nonlinear system was obtained by online support vector machine to train a sequence data of input and output, and we can improve the system model accuracy online. The simulation results illustrate that the nonlinear predictive control using online SVM is effective. © 2009 Binary Information Press August, 2009.

关键词： Nonlinear systems

来源：评论

学校读者我要写书评

暂无评论

Implementation and Evaluation of a Ubiquitous Health Monitoring System

Implementation and Evaluation of a Ubiquitous Health Monitor...

引用

International Conference on Complex, Intelligent and Software Intensive Systems, CISIS

作者： Akira Yamazaki Akio Koyama Junpei Arai Leonard Barolli Department of Informatics Graduate School of Science and Engineering Yamagata University Japan Department of Information and Control Engineering Yamagata College of Industry and Technology Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Japan

ISBN: (纸本)9781424435692

In recent years, because of the birthrate declining and the elderly peoplepsilas population growing, the lack of doctors and the increase of the medical cost is becoming a big problem. One of solution for this problem is to prevent the humans from diseases in order to reduce the medical cost (e.g. by using the hospital as few times as possible). In this research, we have developed a wearable vital sensor which can be used anywhere without disrupting the everyday life of the patient. Furthermore, we have implemented a ubiquitous health monitoring system, which can confirm and share the sensor information received from a cellular phone attached to the wearable vital sensor immediately through the browser. This system can also send emergency report based on sensor information to the family and the doctor. In addition, we verified the system effectiveness by evaluating the implemented system.

关键词： Biomedical monitoring Wearable sensors Sensor systems Costs Senior citizens Humans Diseases Hospitals Patient monitoring Cellular phones

来源：评论

学校读者我要写书评

暂无评论

3D measurement technology based on gray coding light by combining gray code with trapezoidal phase shift

引用

Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument 2009年第SUPPL.期30卷 300-304页

作者： Shan, Lina Yu, Xiaoyang Fu, Xiao Wu, Haibin Chen, Deyun College of Measurement Control Tech. and Communication Engineering Harbin University of Science and Technology Harbin 150080 China

An 3D measurement scheme by combining Gray code with Trapezoidal phase-shift is presented. The scheme computes the relative intensity ratios in a Trapezoidal phase-shift period using Trapezoidal phase-shift pattern. Combining the Trapezoidal phase-shift with Gray code corresponding to sampling point, and the absolute intensity ratio of sampling point is determined. Then, 3D measurement is realized using projection geometry matrix model. Encoding and decoding principles by combining Gray code with Trapezoidal phase-shift are presented;period dislocation between Gray code and Trapezoidal phase-shift in course of decoding is analyzed, which could be corrected by judging the consistency between Gray code value increasing and phase mutation of adjacent pixels. Finally, simulation and real system were experimented. The experimental results indicate that relative measurement error of simulation system is about 0.0325% and that of real system is less than 4.0329%.

关键词： Decoding

来源：评论

学校读者我要写书评

暂无评论

Data Filtering Based Recursive Least Squares Parameter Estimation for ARMAX Models

Data Filtering Based Recursive Least Squares Parameter Estim...

引用

WRI International Conference on communications and Mobile Computing, CMC

作者： Yuwu Liao Dongqing Wang Feng Ding Department of Physics and Electronics Information Technology Xiangtan University Xiangtan China College of Automation Engineering Qingdao University of China Qingdao China School of Communication and Control Engineering Jiangnan University Wuxi China

This paper uses an estimated noise transfer function to filter the input-output data and presents a filtering based recursive least squares algorithm for ARMAX models. Through the data filtering, we obtain two identification models, one including the parameters of the system model, and the other including the parameters of the noise model. Thus, the recursive least squares method can estimate the parameters of these two identification models, respectively, by replacing unmeasurable noise terms in the information vectors with their estimates. The proposed F-RLS algorithm has high computational efficiency because the dimensions of its covariance matrices become small and can generate more accurate parameter estimation compared with other existing algorithms.

关键词： Least squares approximation Parameter estimation Autoregressive processes Recursive estimation Filtering algorithms Least squares methods Mobile communication Educational institutions Predictive models Mobile computing

来源：评论

学校读者我要写书评

暂无评论

Subspace Semi-supervised Fisher Discriminant Analysis

引用

自动化学报 2009年第12期35卷 1513-1519页

作者： YANG Wu-Yi LIANG Wei XIN Le ZHANG Shu-Wu Hi-tech Innovation Center Institute of Automation Chinese Academy of Sciences Beijing 100190 P.R. China Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Minister of Education Xiamen University Xiamen 361005 P. R. China College of Oceanography and Environmental Science Xiamen University Xiamen 361005 P. R. China School of Electronics Information and Control Engineering Beijing University of Technology Beijing 100124 P. R. China

Fisher discriminant analysis (FDA) is a popular method for supervised dimensionality reduction. FDA seeks for an embedding transformation such that the ratio of the between-class scatter to the within-class scatter is maximized. Labeled data, however, often consume much time and are expensive to obtain, as they require the efforts of human annotators. In order to cope with the problem of effectively combining unlabeled data with labeled data to find the embedding transformation, we propose a novel method, called subspace semi-supervised Fisher discriminant analysis (SSFDA), for semi-supervised dimensionality reduction. SSFDA aims to find an embedding transformation that respects the discriminant structure inferred from the labeled data and the intrinsic geometrical structure inferred from both the labeled and unlabeled data. We also show that SSFDA can be extended to nonlinear dimensionality reduction scenarios by applying the kernel trick. The experimental results on face recognition demonstrate the effectiveness of our proposed algorithm.

关键词：费希尔判别分析法鉴别分析离散度降维方法

来源：评论

学校读者我要写书评

暂无评论

Distribution of combustible gas alarm based on embedded Ethernet technology

引用

Journal of Harbin Institute of technology(New Series) 2008年第2期15卷 220-223页

作者：丁喜波张俊杰王洋 Space Optics Research Center School of AstronauticsHarbin Institute of Technology College of Measure-control Technology & Communication Engineering Harbin University Science and Technology Heilongjiang Provincial Institute of Measurement and Verification

One kind of combustible gas alarms based on industrial Ethernet was designed to prevent the gas leakage in industrial production sites, The alarm adopted the high performance microprocessor LPC2214 as the main chip. The embedded operating system μC/OS-Ⅱand TCP/IP protocol stack uIP running on LPC2214 constitute a development platform of application of the combustible gas alarm, The test shows that it can automatically and continuously detect combustible gas in industrial production sites in several positions;it can give out sound-light alarm and take protective measures immediately against the gas leakage; and it can send the detected data to PC through the Ethernet interface to realize the remote detection. The designed project provides a reference to design industrial devices based on industrial Ethernet

关键词： industrial Ethernet combustible gas alarm embedded system

来源：评论

学校读者我要写书评

暂无评论

Subspace Semi-supervised Fisher Discriminant Analysis

引用

Acta Automatica Sinica 2009年第12期35卷 1513-1519页

作者： Wu-Yi YANG Wei LIANG Le XIN Shu-Wu ZHANG Hi-tech Innovation Center Institute of Automation Chinese Academy of Sciences Beijing 100190 P. R. China Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Minister of Education Xiamen University Xiamen 361005 P. R. China College of Oceanography and Environmental Science Xiamen University Xiamen 361005 P. R. China School of Electronics Information and Control Engineering Beijing University of Technology Beijing 100124 P. R. China

关键词： Fisher discriminant analysis (FDA) semi-supervised learning manifold regularization dimensionality reduction

来源：评论

学校读者我要写书评

暂无评论

Efficiency-aware and fairness-aware joint-layer optimization for downlink data scheduling in OFDM

引用

Science in China(Series F) 2008年第2期51卷 171-182页

作者： GUO KunQi SUN LiXin WANG Ping JIA ShiLou Shanghai Research Center for Wireless Communications Shanghai Institute of Microsystem and Infor- mation Technology Chinese Academy of Sciences Shanghai 200050 China School of Measurement & Control Technology and Communication Engineering Harbin University of Science and Technology Harbin 150080 China Communication Research Center Harbin Institute of Technology Harbin 150001 China

Efficiency and fairness are two crucial issues to be considered for resource alloca- tion in multi-user wireless networks. Based on the joint optimization of physical layer and data link layer, an optimization model is derived to achieve efficient and fair downlink data scheduling in multi-user OFDM wireless networks by maximizing the total utility function with respect to the average waiting time of user queue. A dynamic sub-carrier allocation algorithm （DSAA） based on the optimization model is proposed in order to obtain the maximization of the total scheduling utility. Effi- ciency is improved by combining DSAA with time scale interference predictor （TSIP） which at large time scales predict ON/OFF period of user data with temporal corre- lation structure across multiple time scales in multi-user interference environment. Simulation results verify the efficiency and fairness of the scheme.

关键词： OFDM efficiency and fairness joint-layer scheduling utility function

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：