检索结果-内蒙古大学图书馆

2009 American Control Conference (ACC 2009)

作者： Deyuan Meng Yingmin Jia Junping Du Fashan Yu Seventh Research Division Beihang University (BUAA) Beijing 100083 P. R. China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 P. R. China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan P. R. China

ISBN: (纸本)9781424445233

This paper deals with the robust iterative learning control (ILC) problem for time-delay systems (TDS) subject to matched parameter uncertainties. Based on two-dimensional (2-D) approach, a stability analysis of the ILC process is developed in the sense that the control error converges monotonically as a function of iteration. It shows that a sufficient condition for the ILC stability can be given in terms of linear matrix inequalities (LMIs), which derives learning gains directly. Simulation results show that the ILC system under a law using gains solved by the LMI approach is robustly stable and monotonically convergent.

关键词： Iterative methods Control systems Robust control Uncertain systems Two dimensional displays Stability analysis Error correction Sufficient conditions Linear matrix inequalities Robustness

来源：评论

学校读者我要写书评

暂无评论

New definition of small message criterion and its application in transaction covert channel mitigating

引用

Ruan Jian Xue Bao/Journal of Software 2009年第4期20卷 985-996页

作者： Zeng, Hai-Tao Wang, Yong-Ji Zu, Wei Cai, Jia-Yong Ruan, Li Laboratory for Internet Software Technologies Institute of Software Chinese Academy of Sciences Beijing 100190 China State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing 100190 China Automation College Harbin Engineering University Harbin 150001 China Graduate University Chinese Academy of Sciences Beijing 100049 China National Engineering Research Center for Fundamental Software Institute of Software Chinese Academy of Sciences Beijing 100190 China

Small Message Criterion (SMC) can measure the capability of the covert channel on transmitting small messages and is a necessary complement to the capacity criterion. However, SMC's present definition has deficiencies. The acquirement of message length proved to be hard in the common information system. Mitigating mechanism can not simultaneously satisfy the two restrictions of message transfer time and fidelity. The criterion does not cover information of message's sensitivity. At first, the value function of message is introduced to represent the danger of small message transmission. Based on the value function, a new definition of SMC is presented where the threat tolerance standard of system is represented by a threshold of message value. The value function also takes message's sensitivity into account. A mechanism for secure real-time database scenario, which combines SMC with the channel capacity, is presented to measure and mitigate the threat of transaction covert channel. Theoretical analysis and experimental results show that with the proposed new SMC, the secure system can perform comprehensive measurement and adjustable mitigation to the threat of covert channel. © by Institute of Software, the Chinese Academy of sciences.

关键词： computer software

来源：评论

学校读者我要写书评

暂无评论

Performance and robustness analysis of a fuzzy-immune flow controller in ATM networks with time-varying multiple time-delays

引用

控制理论与应用（英文版） 2008年第3期6卷 253-258页

作者： Tao REN Zhenhua GAO Weiming KONG Yuanwei JING Muyi YANG Georgi M. DIMIROVSKI Key Laboratory of Process Industry Automation of MOE and Liaoning Province Northeastern University Shenyang Liaoning 110004 China School of Information Science and Engineering Northeastern University Shenyang Liaoning 110004 China Faculty of Engineering Department of Computer Engineering Dogus University Istanbul TR-347222 Republic of Turkey

For the Asynchronous Transfer Mode （ATM） networks with time-varying multiple time-delays, a more realistic model for the available bit rate （ABR） traffic class with explicit rate feedback is introduced. A fuzzy-immune controller is designed, which can adjust the rates of ABR on-line, overcome the bad effect caused by the saturation nonlinearity and satisfy the weighted fairness. Also, the sufficient condition that guarantees the stability of the closed-loop system with a fuzzy-immune controller is presented in theory for the first time. The algorithm exhibits good performance, and most importantly, has a solid theoretical foundation and can be implemented in practice easily. Simulation results show that the control system is rapid, adaptive, robust, and meanwhile, the quality of service （QoS） is guaranteed.

关键词： ATM networks ABR traffic Time-delay Fuzzy-immune controller Robust stabilization

来源：评论

学校读者我要写书评

暂无评论

Heuristic for no-wait flow shops with makespan minimization based on total idle-time increments

引用

science in China(Series F) 2008年第7期51卷 896-909页

作者： LI XiaoPing1,2 & WU Cheng3 1 School of computer science & engineering, Southeast University, Nanjing 210096, China 2 Key laboratory of computer Network and Information Integration (Southeast University), Ministry of Education, Nanjing 210096, China 3 Department of automation, Tsinghua University, Beijing 100084, China 1. School of Computer Science & Engineering Southeast University Nanjing 210096 China 2. Key Laboratory of Computer Network and Information Integration (Southeast University) Ministry of Education Nanjing 210096 China 3. Department of Automation Tsinghua University Beijing 100084 China

No-wait flow shops with makespan minimization are classified as NP-hard. In this paper, the optimization objective is equivalently transformed to total idle-time minimization. The independence relationship between tasks is analyzed, and objective increment properties are established for the fundamental operators of the heuristics. The quality of the new schedules generated during a heuristic is judged only by objective increments and not by the traditional method, which computes and compares the objective of a whole schedule. Based on objective increments, the time complexity of the heuristic can be decreased by one order. A seed phase is presented to generate an initial solution according to the transformed objective. Construction and improvement phases are introduced by experimental analysis. The FCH （fast composite heuristic） is proposed and compared with the most effective algorithms currently available for the considered problem. Experimental results show that the effectiveness of the FCH is similar to that of the best methods but requires far less computation time. The FCH can also be efficient in real time scheduling and rescheduling for no-wait flow shops.

关键词： no-wait flow shops heuristic makespan Tabu search

来源：评论

学校读者我要写书评

暂无评论

Real-time mobile robot teleoperation via Internet based on predictive control

引用

中国高等学校学术文摘·机械工程 2008年第3期3卷 299-306页

作者： Shihua WANG Bugong XU YunHui LIU Yeming ZHOU Laboratory of Real-Time Control Through Internet and Fieldbuses College of Automation Science and Engineering South China University of Technology Guangzhou 510640 China Naval Arms Command Academy of Guangzhou Guangzhou 510430 China Laboratory of Real-Time Control Through Internet and Fieldbuses College of Automation Science and Engineering South China University of Technology Guangzhou 510640 China Naval Arms Command Academy of Guangzhou Guangzhou 510430 China Department of Automation and Computer Aided Engineering The Chinese University of Hong Kong Shatin N.T. HK China

A remote control system that can control a mobile robot in real time via the internet is proposed. To compensate for the network delay and counteract its impact on the teleoperation system, a predictive control scheme based on the modified Smith predictor proposed is selected. To ensure the stability and transparency of the system, a dynamic model manager is designed based on the information exchange between the sensors at the mas-ter and slave sides. To precisely predict the time delay, a new timer synchronization algorithm is proposed. To decrease delay- jitter, a new data buffer scheme is per-formed. Force feedback and a virtual predictive display are introduced to enhance the real-time efficiency of tele-operation. The usefulness and effectiveness of the pro-posed method and system are proven by teleoperation experiments via the internet over a long distance.

关键词： teleoperation internet robots predictive con-trol delay algorithm

来源：评论

学校读者我要写书评

暂无评论

The building of a CBD-based domain ontology in Chinese

The building of a CBD-based domain ontology in Chinese

引用

2008 IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology - Workshops, WI-IAT Workshops 2008

作者： Sui, Zhifang Zhao, Jun Kang, Wei Zhao, Qingliang Institute of Computational Linguistics School of Electronics Engineering and Computer Science Peking University China National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences China

ISBN: (纸本)9780769534961

This paper describes a method of building a medical ontology prototype in Chinese. During the procedure, we explored the following questions, which are crucial for the task of ontology engineering: (1) Are there some more computer-understandable knowledge description models? We proposed a structural and fine-grained knowledge description model called concept-based description model (CBD) to describe the rich knowledge in the ontology. That is, to use other concept or the combination of the related concepts to represent the targeted concept, which is supposed to be more computer-understandable;(2) During large scale ontology engineering, how to use NLP technologies to reduce domain experts' work to the minimal? In our work, we used some NLP technologies to try to reduce domain experts' work to the minimal as possible as it can. The experiments show the significance of our method. © 2008 IEEE.

关键词： Ontology

来源：评论

学校读者我要写书评

暂无评论

STUDY ON THE CONSTRUCTION OF DOMAIN TEXT CLASSIFICATION MODEL WITH THE HELP OF DOMAIN KNOWLEDGE

STUDY ON THE CONSTRUCTION OF DOMAIN TEXT CLASSIFICATION MODE...

引用

2008 International Conference on Machine Learning and Cybernetics(2008机器学习与控制论国际会议)

作者： JIAN-YI GUO ZHENG-TAO YU LU HAN ZHI-KUN ZHANG XIANG-YAN MENG CUN-LI MAO The School of Information Engineering and Automation Kunming University of Science and Technology The School of Information Engineering and Automation Kunming University of Science and Technology The Institute of Intelligent Information Processing Computer Technology Application Key Laboratory

Traditional text classification model uses statistical methods to obtain features. But in the aspect of discrimination domain and non-domain text category, domain knowledge relations haven't been taken account of in these methods. A domain text classification model was presented in this paper. This model used the support vector machine learning algorithm, gained domain classification feature words through statistic and union domain words, structured domain classification feature space. With the help of domain knowledge relations, computed relevance between domain concepts, got domain classification feature weight. Finally domain text classification was realized. An experiment in the Yunnan tourism domain was carried on to confirm that domain knowledge relations have a good influence on the domain text classification. The classification accuracy rate has been increased 0.04 than improved TFIDF method.

关键词： Tezt classification Feature selection Domain knowledge Relations

来源：评论

学校读者我要写书评

暂无评论

IEEE Transactions on Haptics: Editorial

引用

IEEE Transactions on Haptics 2008年第1期1卷 2-8页

作者： Edward Colgate, J. Lederman, Susan Prattichizzo, Domenico Barbagli, Federico Basdogan, Cagatay Buss, Martin Ernst, Marc Frisoli, Antonio Gillespie, Brent Grant, Danny Harders, Matthias Hayward, Vincent Jones, Lynette Kajimoto, Hiroyuki Kappers, Astrid Kheddar, Abderrahmane Lin, Ming C. MacLean, Karon Miller, Brian Noma, Haruo Okamura, Allison M. O'Malley, Mareia Ryu, Jeha Tan, Hong Z. Yokokohji, Yasuyoshi Department of Psychology School of Computing Queen's University Canada IEEE Robotics and Automation Society Tübingen Germany Stanford University's Computer Science Department Tübingen Germany Institute of Automatic Control Engineering Technische Universität München Germany Independent Research Group Multisensory Perception and Action Max Planck Institute for Biological Cybernetics Tübingen Germany Department of Applied Mechanics SSSA Japan Research Division Virtual Reality and Telerobotic Systems PERCRO Laboratory Japan Department of Mechanical Engineering Japan Department of Robotics McGill University Canada Computer Vision Lab ETH Zurich Japan Virtual Reality in Medicine Group Japan IEEE CS/RAS Technical Committee on Haptics Japan Department of Electrical and Computer Engineering McGill University Canada Department of Mechanical Engineering MIT Japan University of Electro-Communications Japan Department of Physics and Astronomy Utrecht University Netherlands University of Evry France Chapel Hill United States Department of Computer Science University of British Columbia Canada ATR Knowledge Science Lab United Kingdom Department of Mechanical Engineering Denmark Johns Hopkins University United States Laboratory for Computational Sensing and Robotics United Kingdom Engineering Research Center for Computer-Integrated Surgical Systems and Technology United States Mechanical Engineering and Materials Science Department Rice University United States Korea Republic of Department of Electrical and Computer Engineering Mechanical Engineering and Psychological Sciences Purdue University United States Department of Mechanical Engineering and Science Graduate School of Engineering Kyoto University Japan

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

Quantized Hcontroller design for networked control systems

Quantized Hcontroller design for networked control systems

引用

Chinese Control and Decision Conference 2008, CCDC 2008

作者： Zhu, Xun-Lin Yang, Guang-Hong College of Information Science and Engineering Northeastern University Shenyang Liaoning 110004 China School of Computer and Communication Engineering Zhengzhou University of Light Industry Zhengzhou Henan 450002 China Key Laboratory of Integrated Automation of Process Industry Ministry of Education Northeastern University Shenyang 110004 China

ISBN: (纸本)9781424417346

This paper studies problems of stability and stabilization for discrete-time networked control systems (NCSs) with an H∞ performance bound via quantized state feedback. The effects of both the signal quantization and the network conditions are taken into consideration. In order to estimate the lower bound of quantization ranges directly, a new model of NCSs via quantized state feedback is presented, based on which a new quantized H∞ controller design method is proposed. A numerical example is given to illustrate the merit and effectiveness of the proposed methods. ©2008 IEEE.

关键词： Networked control systems

来源：评论

学校读者我要写书评

暂无评论

The Building of a CBD-Based Domain Ontology in Chinese

The Building of a CBD-Based Domain Ontology in Chinese

引用

IEEE WIC ACM International Conference on Web Intelligence (WI)

作者： Zhifang Sui Jun Zhao Wei Kang Qingliang Zhao Institute of Computational Linguistics School of Electronics Engineering and Computer Science Peking University China National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences China

This paper describes a method of building a medical ontology prototype in Chinese. During the procedure, we explored the following questions, which are crucial for the task of ontology engineering: (1) are there some more computer-understandable knowledge description models? We proposed a structural and fine-grained knowledge description model called concept-based description model (CBD) to describe the rich knowledge in the ontology. That is, to use other concept or the combination of the related concepts to represent the targeted concept, which is supposed to be more computer-understandable; (2) during large scale ontology engineering, how to use NLP technologies to reduce domain expertspsila work to the minimal? In our work, we used some NLP technologies to try to reduce domain expertspsila work to the minimal as possible as it can. The experiments show the significance of our method.

关键词： Ontologies Biomedical engineering Buildings Natural languages Intelligent agent Computational linguistics computer science Design engineering Knowledge engineering Large-scale systems

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：