检索结果-内蒙古大学图书馆

作者： Gershman, A.B. Stoica, P. Pesavento, M. Larsson, E.G. McMaster University Communications Research Laboratory Department of Electrical and Computer Engineering Hamilton Ont. Canada McMaster University Signal Theory Group Ruhr University Department of Electrical and Computer Engineering Bochum Germany Uppsala University Department of Systems and Control Uppsala Sweden

The stochastic Cramér-Rao bound (CRB) plays an important role in array processing because several advanced high-resolution direction-of-arrival (DOA) estimation methods are known to achieve this bound asymptotically. In the paper, the stochastic CRB on the DOA estimation accuracy is studied in the general case of an arbitrary unknown noise field parameterised by a vector of unknowns. Explicit closed-form expressions for the CRB are derived and its properties are examined theoretically and by practically relevant numerical examples.

关键词： Signal processing

来源：评论

学校读者我要写书评

暂无评论

A new stability condition for second-order linear systems 6

A new stability condition for second-order linear systems

引用

6th European control Conference, ECC 2001

作者： Duan, G.R. Liu, G.P. Thompson, S. School of Mechanical and Manufacturing Engineering Queen's University of Belfast Stranmillis Road BelfastBT9 5AH United Kingdom School of Mechanical Materials Manufacturing Eng. and Management University of Nottingham University Park NottinghamNG7 2RD United Kingdom Research Office for Control Systems Theory Department of Control Science and Engineering Harbin Institute of Technology Harbin150001 China

ISBN: (纸本)9783952417362

Based on the Lyapunov Stability Theorem for linear systems, a very simple sufficient stability condition is derived for second-order linear systems in terms of the positive definiteness of the system coefficient matrices. This condition generalizes some known result and may have important applications in robust stability analysis and robust stabilization of uncertain second-order linear systems. © 2001 EUCA.

关键词： Linear systems

来源：评论

学校读者我要写书评

暂无评论

Robust pole assignment in descriptor linear systems via state feedback 6

Robust pole assignment in descriptor linear systems via stat...

引用

6th European control Conference, ECC 2001

作者： Duan, G.R. Nichols, N.K. Liu, G.P. School of Mechanical and Manufacturing Engineering Queen's University of Belfast Stranmillis Road BelfastBT9 5AH United Kingdom Department of Mathematics University of Reading ReadingRG6 6AF United Kingdom School of Mechanical Materials Manufacturing Eng. and Management University of Nottingham University Park NottinghamNG7 2RD United Kingdom Research Office for Control Systems Theory Department of Control Engineering and Science Harbin Institute of Technology Harbin150001 China

ISBN: (纸本)9783952417362

The problem of eigenvalue assignment with minimum sensitivity in multivariable descriptor linear systems via state feedback is considered. Based on the perturbation theory of generalized eigenvalues of matrix pairs, the sensitivity measures of the closed-loop finite eigenvalues are established in terms of the closed-loop normalized right and left eigenvectors. By combining these measures with a recently proposed general parametric eigenstructure assignment result for descriptor linear systems via state feedback, the robust pole assignment problem is converted into an independent minimization problem. The optimality of the obtained solution to the robust pole assignment problem is totally dependent on the solution to the independent minimization problem. The closed-loop eigenvalues are also taken as a part of the design parameters and are optimized, together with the other degrees of freedom, within certain desired regions on the complex plane. The approach takes numerical stability into consideration and also gives good robustness for the closed-loop regularity. © 2001 EUCA.

关键词： State feedback

来源：评论

学校读者我要写书评

暂无评论

Right coprime factorizations using system upper Hessenberg forms-the multi-input system case

Right coprime factorizations using system upper Hessenberg f...

引用

IEEE Conference on Decision and control

作者： Guang-Ren Duan School of Mechanical and Manufacturing Engineering Queen''s University Belfast Belfast UK The Research Ofice for Control Systems Theory Department of Control Engineering Harbin Institute of Technology Harbin China

ISBN: (纸本)0780366387

Based on a method for right coprime factorizations of linear systems using matrix elementary transformations, it is shown that a very simple iteration formula exists for right coprime factorizations of multi-input linear systems in system upper Hessenberg forms. This formula gives directly the coefficient matrices of the pair of solutions to the right coprime factorization of the system Hessenberg form, and involves only manipulations of inverses of a few triangular matrices and some matrix productions and summations. Based on this formula, a simple, efficient procedure for determining a right coprime factorization of a multi-input linear system is proposed, which first converts a given linear system into its system Hessenberg form using some orthogonal similarity transformations and then applies the iteration formula to the converted system Hessenberg form. An example demonstrates the usage of the approach.

关键词： Computer aided software engineering Linear systems control systems Robustness Matrix converters Production systems Vectors Manufacturing control engineering Polynomials

来源：评论

学校读者我要写书评

暂无评论

Robust Eigenvalue Assignment in Descriptor systems via Output Feedback

引用

IFAC Proceedings Volumes 2000年第24期33卷 185-190页

作者： G.R. Duan J. Lam School of Mechanical and Manufacturing Engineering The Queen's University of Belfast Stranmillis Road Belfast BT9 5AH UK Tel: +44 1232 27 4123 The Research Office for Control Systems Theory Harbin Institute of Technology Harbin Harbin 150001 P. R. China Department of Mechanical Engineering The University of Hong Kong Hong Kong P. R China

Based on a recently proposed parametric approach for eigenstrueture assignment in descriptor linear systems via output feedback, the robust eigenvalue assignment problem in descriptor linear systems via output feedback is solved. The problem aims to assign a set of finite closed-loop eigenvalues which have minimum sensitivities with respect to perturbations in the closed-loop coefficient matrices, while at the same time, guarantee the closed-loop regularity. The approach optimizes the design parameters existing in the closed-loop eigenvectors to achieve the minimum eigenvalue sensitivities, and use the extra degree of freedom existing in the solution ofthe gain matrix to further minimize the magnitude ofthe gain matrix and enhance the robustness ofthe closed-loop regularity. The approach allows the finite closed-loop eigenvalues to be optimized within desired regions, and is demonstrated to be simple and effective.

关键词： Descriptor systems output feedback robust pole assignment eigenvalue sensitivities eigenstructure assignment

来源：评论

学校读者我要写书评

暂无评论

Robust stabilization of descriptor linear systems via proportional-plus-derivative state feedback

Robust stabilization of descriptor linear systems via propor...

引用

American control Conference (ACC)

作者： G.R. Duan G.W. Irwin G.P. Liu School of Mechanical and Manufacturing Engineering Queen''s University Belfast Belfast UK Research Office for Control Systems Theory Department of Control Engineering Harbin Institute of Technology Harbin China School of Electrical and Electronic Engineering Queen''s University Belfast Belfast UK Mechanical Engineering Center GEC Alsthom Leicester UK

A sufficient condition, in terms of quadratic stability of matrices, for the class of regular descriptor linear systems which possess no infinite relative eigenvalues is presented. Utilizing this result, the problem of stabilization of descriptor linear system via proportional-plus-derivative (PD) state feedback control is converted into two related quadratically stabilization problems, which can be easily solved using linear matrix inequality (LMI) techniques. Based on the same idea, robust stabilization via PD state feedback for uncertain descriptor linear systems, with coefficient matrices belonging to some compact sets in proper matrix spaces, has also been dealt with.

关键词： Robustness Linear systems Linear matrix inequalities Matrix converters State feedback Sufficient conditions Stability Eigenvalues and eigenfunctions PD control Linear feedback control systems

来源：评论

学校读者我要写书评

暂无评论

Generation of structured process models using genetic programming 3rd

Generation of structured process models using genetic progra...

引用

3rd Workshop on Artificial Intelligence and Simulation of Behaviour, AISB 1996

作者： Pohlheim, Hartmut Marenbaeh, Peter Daimler Benz AG Systems Technology Research Alt-Moabit 96a BerlinD-10559 Germany Darmstadt University of Technology Institute of Control Engineering Department of Systems Theory and Robotics Landgraf-Georg-Strare 4 DarmstadtD-64283 Germany

ISBN: (纸本)3540617493

The design of structured mathematical models of processes in a certain level of abstraction defined by the given task appears to be difficult and time consuming even for experienced experts. This paper reports on a new method for the design of structured process models based on the metaphor of Genetic Programming. This new methodology allows the automatic generation of non-linear process models in a self-organizing way. © Springer-Verlag Berlin Heidelberg 1996.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

FAULT-TOLERANT ASSOCIATE MEMORIES

引用

systems AND COMPUTERS IN JAPAN 1995年第7期26卷 1-12页

作者： FUJIWARA, E TANAKA, T Member Faculty of Engineering Tokyo Institute of Technology Tokyo Japan 152 Eui Fujiwara:received his B.S. and M.S. degrees in Electronics Engineering in 1968 and 1970 respectively and his Dr. of Eng. degree in 1981 all from Tokyo Institute of Technology. In 1970 he joined the NTT Musashino Electrical Communication Laboratories and engaged in developing PIPS-1 and PIPS-11 computer systems. In 1988 he joined the Department of Computer Science Tokyo Institute of Technology as an Associate Professor. In 1990 he became a full Professor. He was a Visiting Professor at the Center for Advanced Computer Studies the University of Southwestern Louisiana from June 1985 to July 1986. His current research interests include coding theory for computers fault-tolerant memories VLSI defect-toleranceand WSI systems. He is a co-author ofError Control Coding for Computer Systems(Prentice-Hall1989) EssentiaLF of Error-Correcting Coding Techniques (Academic Press 1990) and other books. Dr. Fujiwara received the Young Engineer Award from the I.E.I.C.E. in 1978 and the Teshima Memorial Research Award in 1991. He is a senior member of the IEEE and a member of the Information Processing Society Japan. Associate Member

Because of its capability of high-speed search, the associative memory (CAM) is expected to be used in a variety of information processing systems. In this paper, novel fault-tolerant techniques which are effective for on-line use are proposed for TLB which is an example of the application of CAM. First, fault and error models of the TLB consisting of the CAM part and the SRAM part are clarified. Then, the fault-tolerant techniques for these faults and errors, such as distance separable technique, cod-ing technique, simplified 1-out-of-n check and graceful degradation, are proposed. The distance separable technique which encodes the data stored in the CAM part is the one which masks the faulty CAM part and prevents errors from propagating to the subsequent circuits. The coding technique checks the one-to-one correspondence between the data in the CAM and those in SRAM by using the SEC-DED code with byte error detection capability, i.e., SEC-DED-SbED code, and at the same time it detects and corrects errors in the data stored in SRAM. The simplified 1-out-of-n check processes association errors. The graceful degradation gives a flag in the faulty memory section and prevents it from being used. The methods proposed in this paper are evaluated from area augmentation and error detection capability perspectives. The results show that the fault-tolerant TLB with 32 virtual address bits, 32 physical address bits and 128 entries gives single fault detection probability of nearly 99 percent with 28 percent area increase.

关键词： CAM TLB DISTANCE SEPARABLE TECHNIQUE CODING TECHNIQUE SIMPLIFIED 1-OUT-OF-N CHECK GRACEFUL DEGRADATION

来源：评论

学校读者我要写书评

暂无评论

PARALLEL-FORM REALIZATION OF 2-D ADAPTIVE SEPARABLE-DENOMINATOR STATE-SPACE FILTERS

引用

ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC SCIENCE 1995年第1期78卷 44-55页

作者： MUNEYASU, M HINAMOTO, T Faculty of Engineering Hiroshima University Higashi-Hiroshima Japan 724 Mitsqji Muneyasu received his B.E. and M.E. degrees in Systems Engineering from Kobe University in 1982 and 1984 respectively. In 1984 he joined Oki Electric Industry Co. Ltd. in Tokyo. From 1990 to 1992 he was on the Faculty of Engineering Tottori University. He is currently a Research Associate in the Department of Electrical Engineering Hiroshima University. His research interest includes multidimensional digital signal processing. He is a member of the Information Processing Society of Japan. Members TaKao Hinamoto received his B.E. M.E. and Dr. of Eng. degrees in Electrical Engineering from Okayama University Kobe University and Osaka University in 1969 1971 and 1977 respectively. From 1972 to 1988 he was on the Faculty of Engineering Kobe University from 1988 to 1991 he was a Professor on the Faculty of Engineering Totton University and is currently Professor of Control Electronics the Faculty of Engineering Hiroshima University. His research interests include digital signal processing and system theory. He is a member of IEEE CAS ASSP and CS Society.

This paper treats the parallel-form realization of two-dimensional (2-D) adaptive state-space filters whose transfer functions are separable in the denominator. The adaptive filters are described by the Roesser local state-space (LSS) model, and the least mean squares (LMS) method is used here to adjust the filter parameters. First, the Roesser LSS model with separable denominator is realized in a parallel form. Then the stability condition of the tilter is shown. Next, the LMS method is employed to adjust the filter parameters in the parallel form. In addition, the computational time and the number of processors required for the realization are investigated. Finally, the adaptive filter is applied in numerical examples to the 2-D spatial-domain filter design and to the noise reduction of an image.

关键词： ADAPTIVE FILTER PARALLEL-FORM REALIZATION 2-D DIGITAL FILTER ROESSERS MODEL IMAGE PROCESSING

来源：评论

学校读者我要写书评

暂无评论

HYBRID SATELLITE AND TERRESTRIAL NETWORKS

引用

INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS 1994年第3期12卷 313-327页

作者： CHITRE, DM SHYY, DJ EPHREMIDES, A GUPTA, S COMSAT Laboratories 22300 Comsat Drive Clarksburg MD 20871–9475 USA. Received his B.Sc. from the University of Bombay India an M.A. in mathematics from the University of Cambridge U.K. and a Ph.D. in physics from the University of Maryland. He is currently an Associate Executive Director of the Network Technology Division at COMSAT Laboratories. He has been involved in research and development activities in ISDN VSAT networks data communications and network systems and architectures. Prior to his current positions Dr. Chitre was a Principal Scientist in the Network Technology Division at COMSAT Laboratories. Dr. Chitre joined COMSAT Laboratories in 1980. He has made major contributions to the analysis and architecture of data communication ISDN and BISDN via satellite. Dr. Chitre directs and participates in the international and national standards activities in ISDN BISDN and data communication as they apply to satellite communication. He was Chairman of the Working Group on Protocols and Network Timing Function of the CCIR/CCITT Joint Ad Hoc Group on ISDN/Satellite Matters during 1990–1992. Currently he is the Chairman of the Working Group on New Technologies in the ITU Intersector Coordinating Group (ICG) on Satellite Matters. Dr. Chitre was a programme manager during 1990 and 1991 on a contract from INTELSAT on systems studies on satellite communications systems architectures for ISDN and broadband ISDN systems. Currently he is the technical manager of the DoD Contract on ATM via satellite demonstration and the programme manager for the INTELSAT contract on analysis and top-level specification of INTELSAT ISDN subnetworks and SDH compatible transport network. Received the B.S. degree in electrical engineering from national Chiao-Tung University Hsin-Chu Taiwan in 1983 and the M.S. and Ph.D. degrees in electrical engineering from Georgia Institute of Technology Atlanta GA in 1986 and 1990 respectively. From June 1987 to October 1987 he worked for the Department of Neurology Emory Univers

The role of satellite communications in networks that provide new services, such as frame relay and multimedia, is investigated. Both passive and active (on-board switching/processing) satellite systems are considered. Novel techniques are developed for each system to demonstrate, via detailed analysis and simulation, how the communications bandwidth agility of multipoint/broadcast satellite channels, and the on-board switching/processing, makes it feasible to provide these new services via hybrid satellite and terrestrial networks in a resource-efficient manner.

关键词： HYBRID NETWORKS ON-BOARD PROCESSING FRAME RELAY

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：