检索结果-内蒙古大学图书馆

International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Lei-Ming Liu Shu-Hua Yang Chao-Nan Tong School of Automation & Electrical Engineering University of Science and Technology Beijing Beijing China Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) Beijing China

ISBN: (纸本)9781479902590

The model of NCS (Networked control Systems) with output feedback controller is presented for the case when the network- induced random time-varying delays are bounded and the upper bound of which is longer than one sampling period. Thus we established a discrete-time jump system model with Markov delay. Based on this, this paper gives the optimization method to design stabilizing controllers. This paper generalizes previous results on delay-less output feedback control systems and state feedback systems with Markov time delay. Theoretical analysis and simulation on a two input two output system with Markov time delay show that the output feedback controller we proposed can make the system stable.

关键词： Analytical models Output feedback Abstracts Barium Optimization

来源：评论

学校读者我要写书评

暂无评论

Model Reduction of Two-Dimensional Discrete-time Systems Based on Finite-Frequency Approach

Model Reduction of Two-Dimensional Discrete-time Systems Bas...

引用

第三十二届中国控制会议

作者： Da-Wei Ding Xiaoli Li School of Automation & Electrical Engineering University of Science and Technology Beijing Key Laboratory of Advanced Control of Iron and Steel Process(Ministry of Education) University of Science and Technology Beijing

ISBN: (纸本)9781479900305

This paper deals with the model reduction problem of two-dimensional(2-D) discrete-time systems described by the Roesser *** from existing fuU-frequency methods,we propose a finite-frequency model reduction method for 2-D Roesser *** the generalized Kalman-Yakubovich-Popov(GKYP) lemma for 2-D systems,sufficient conditions are developed for model reduction of 2-D Roessor systems over low-frequency,and middle-frequency,*** proposed finite-frequency model reduction method can get a better approximation accuracy than the existing full-frequency ones over the finite-frequency *** effectiveness of the proposed method is illustrated by a numerical example.

关键词： Model reduction two-dimensional Roesser systems finite-frequency ranges

来源：评论

学校读者我要写书评

暂无评论

Integral input-to-state stability of switched nonlinear systems

Integral input-to-state stability of switched nonlinear syst...

引用

第三十二届中国控制会议

作者： Yue-E Wang Caiyun Wu Xi-Ming Sun Georgi M. Dimirovski Jun Zhao The State Key Laboratory of Synthetical Automation for Process Industries (Northeastern University) The School of Control Science and Engineering Dalian University of Technology The school of Engineering Dogus University The school of FIET SS Cyril and Methodius University

ISBN: (纸本)9781479900305

This paper addresses the issues of the input-to-state stability (ISS) and integral input-to-state stability (iISS) for a class of switched nonlinear systems. Based on a piecewise Lyapunov function method, some sufficient conditions are explicitly given to guarantee the ISS and iISS of the switched nonlinear system under a certain class of switching signals, respectively. Moreover, the Lyapunov function considered in this paper decays in a more general form, which is presented as the negative definite function of the state instead of just some negative multiple of the Lyapunov function. This gives a more general sufficient conditions of input-to-state stability for switched nonlinear systems.

关键词： Switched nonlinear system, Input-to-state stability, Integral input-to-state stability

来源：评论

学校读者我要写书评

暂无评论

Ground control system development and path planning design for unamnned aerial vehicles

Ground control system development and path planning design f...

引用

Chinese control Conference (CCC)

作者： Shibo Liu Bin Xian Tingting Zhao Yao Zhang Xu Zhang The Institute of Robotics and Autonomous System the Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University 300072 China Tianjin University Tianjin Tianjin CN

A ground control system (GCS) for unmanned aerial vehicles (UAV) is developed in this paper. Different tasks, which include real time communication between GCS and UAVs, data processing and storing, localization, path planning and so on, can be accomplished in the proposed GCS. To address the issue of path planning problem for UAVs, a new path planning algorithm based on potential function is proposed to drive the UAV to its destination in this paper. Time-varying gain adjusting method is used to enable the UAV obstacle avoidance ability under the constraints for the translation velocity. Lyapunov based analysis is used to prove the stability of the proposed algorithm. Numerical simulation results are included to demonstrate the performance of the proposed path planning design.

关键词： Path planning IEEE 802.11 Standards Global Positioning System Electronic mail Algorithm design and analysis MATLAB

来源：评论

学校读者我要写书评

暂无评论

Calculation and Analysis of Temperature Distribution in Hot Rolling Strip

引用

Telkomnika - Indonesian Journal of Electrical engineering 2013年第7期11卷 3945-3956页

作者： Peng, Kaixiang Key Laboratory for Advanced Control of Iron and Steel Process School of Automation and Electrical Engineering University of Science and Technology of Beijing No. 30 Xueyuan Road Haidian District Beijing 100083 China

Modern steel grades require constant and reproducible production conditions both in the hot strip mill and in the cooling section to achieve constant material properties along the entire strip length and from strip to strip. Calculation of the temperature in final rolling process always utilizes factors such as the work piece's inner organizational structure, plastic deformation, and it's variations of properties and so on, also as well as the physical parameters such as gauge, shape, etc. In this paper, a finite element model is constructed for the temperature field in a rolling *** temperature field of strip steel is modeled with a 3-D finite element analysis (FEA) structure, simultaneously considering the distribution of thework roll temperature. Then the distribution of field is simulated numerically. From the model, the temperature contours can be obtained by analysis of the temperature distribution of contact area. At the same time, the distribution of temperature in any position at any time can be acquired. These efforts provide the reliable parameters for the later finishing temperature and shape control. © 2013 Universitas Ahmad Dahlan.

关键词： Hot rolling

来源：评论

学校读者我要写书评

暂无评论

Fine-grained image classification using color exemplar classifiers

Fine-grained image classification using color exemplar class...

引用

14th Pacific-Rim Conference on Multimedia, PCM 2013

作者： Zhang, Chunjie Xiong, Wei Liu, Jing Zhang, Yifan Liang, Chao Huang, Qingming School of Computer and Control Engineering University of Chinese Academy of Sciences 100049 Beijing China National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences P.O. Box 2728 Beijing China National Engineering Research Center for Multimedia Software Wuhan University 430072 Wuhan China Key Lab of Intell. Info. Process Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9783319037301

The use of local features has demonstrated its effectiveness for many visual applications. However, local features are often extracted with gray images. This ignores the useful information within different color channels which eventually hinders the final performance, especially for fine-grained image classification. Besides, the semantic information of local features is too weak to be applied for high-level visual applications. To cope with these problems, in this paper, we propose a novel fine-grained image classification method by using color exemplar classifiers. For each image, we first decompose it into multiple color channels to take advantage of the color information. For each color channel, we represent each image with a response histogram which is generated by exemplar classifiers. Experiments on several public image datasets demonstrate the effectiveness of the proposed color exemplar classifier based image classification method. © Springer International Publishing Switzerland 2013.

关键词： Image classification

来源：评论

学校读者我要写书评

暂无评论

Model-based fault detection of a nonlinear system using interval type-2 fuzzy systems with non-singleton type-2 fuzzification

Model-based fault detection of a nonlinear system using inte...

引用

International Conference on control, Instrumentation, and automation

作者： Hossein Monirvaghefi Mahdi Aliyari Shoorehdeli Advanced Process and Automation Control (APAC) group K. N. Toosi university of technology Tehran Iran Department of Mechatronics Engineering K. N. Toosi university of technology Tehran Iran

In this study interval type-2 fuzzy systems with non-singleton type-2 fuzzifire are used for identification and modeling nonlinear systems having noise with changing domain for fault detection purpose. The main idea in this fault detection method is to serve an upper bound and a lower bound as a confidence bound for system output that obtained from the interval type-2 fuzzy system. If we haven't precise information about mean and variance of noise, then non-singleton type-2 fuzzifire is usable. This fuzzifire improves performance of fault detection confidence bound. In the end of this paper a well-known benchmark two-tank system has been used for representing the advantages of proposed fault detection method.

关键词： Fault detection Fuzzy systems Fuzzy sets Uncertainty Noise Fuzzy logic Mathematical model

来源：评论

学校读者我要写书评

暂无评论

Nonlinear system identification with multiple and correlated scheduling variables *

引用

IFAC Proceedings Volumes 2013年第32期46卷 319-324页

作者： Lei Chen Biao Huang Fei Liu Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of Automation Jiangnan University Wuxi 214122 P.R. China Department of Chemical and Materials Engineering University of Alberta Edmonton AB T6G 2G6 Canada

This paper is concerned with identification of nonlinear systems with multiple and correlated scheduling variables. Multiple auto regressive exogenous (ARX) models are identified on different process operating conditions, and a normalized exponential function as the probability density function associated with each of the local ARX models taking effect is then used to combine all the local models to represent the complete dynamics of a nonlinear system. The parameters of the local ARX models and the exponential functions are estimated simultaneously under the framework of the expectation maximization (EM) algorithm. A numerical example is applied to demonstrate the proposed identification method.

关键词： System identification Nonlinear process Multiple models Expectation maximization algorithm Multiple scheduling variables

来源：评论

学校读者我要写书评

暂无评论

Realizability of n-port resistive networks with 2n terminals

Realizability of n-port resistive networks with 2n terminals

引用

Asian control Conference

作者： Michael Z. Q. Chen Chanying Li Kai Wang Zhiqiang Zuo Minghui Yin Guanrong Chen Department of Mechanical Engineering University of Hong Kong Hong Kong China School of Automation Nanjing University of Science and Technology Nanjing China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing China Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China Department of Electronic Engineering City University of Hong Kong Hong Kong China

In this paper, we consider the realizability problem of n-port resistive networks containing 2n terminals. A necessary and sufficient condition for any real symmetric matrix to be realizable as the admittance of an n-port resistive network containing 2n terminals is obtained. The condition is based on the existence of a parameter matrix. We then focus on a three-port resistive network containing six terminals. A necessary and sufficient condition is derived for any real symmetric matrix to be realizable as the admittance of a three-port resistive network containing six terminals and at most five positive elements, whose topological structure is properly restricted.

关键词： Symmetric matrices Ports (Computers) Admittance Educational institutions Resistors Joining processes Passive networks

来源：评论

学校读者我要写书评

暂无评论

A soft sensor development for the estimation of benzene content in catalytic reformate

A soft sensor development for the estimation of benzene cont...

引用

35th International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2012

作者： Ujević Andrijić, Željka Karlović, Romano Žeželj, Boris Faculty of Chemical Engineering and Technology Department of Measurement and Process Control Zagreb Croatia Rijeka Refinery Process Automation Kostrena Croatia

ISBN: (纸本)9789532330724

As vehicle emission standards become more stringent, there is an increasing need for continual monitoring of benzene content in gasoline. Since the on-line analyzers are often unavailable, and laboratory analyses are infrequently obtained, soft sensors for the estimation of benzene content of light reformate are developed. Soft sensors are developed using system identification methods. Experimental data is acquired from the refinery distributed control system (DCS) and include continuously measured variables and analyzer assays available on-line. In the present work, the development of a Finite Impulse Response (FIR) model, an Output Error (OE) model and an Auto-Regressive Model with Exogenous Inputs (ARX) model are presented. To overcome the problem of selecting the best model parameters by trial and error, genetic algorithm was used. Based on developed soft sensors, it is possible to entirely replace on-line analyzers with soft sensors by embedding the model in a DCS on-site. © 2012 MIPRO.

关键词： Benzene

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：