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American Control Conference (ACC)

作者： Jinsong Liang Yangquan Chen Bao-Zhu Guo Center for Self-Organizing and Intelligent Systems (CSOIS) Department of Electrical and Computer Engineering Utah State University Logan UT USA Institute of Systems Sciences Academia Sinica Academy of Mathematics and System Sciences Beijing China

A new simulation method for some typical boundary control problems, combining symbolic algebra and numerical method, is presented with typical examples. The transfer function is obtained in the intermediate steps of t... 详细信息

关键词： Laplace equations Boundary conditions Analytical models Algebra Control systems Partial differential equations Finite difference methods Transfer functions Mechanical systems Space vehicles

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Application of fuzzy neural network in the system of concrete undamaged inspection

Application of fuzzy neural network in the system of concret...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Jing Xu Qingchun Meng Songsen Yang Wen Zhang Changhong Song Department of Civil Engineering Qingdao Institute of Architecture and Engineering Qingdao China Department of Computer Science Ocean University of China Qingdao China State Key Laboratory of Intelligent Technology and Systems Tsinghua University Beijing China

ISBN: (纸本)0780382730

The accuracy of concrete strength inspection has a great influence on the safety evaluation of the building. In order to increase the accuracy, Fuzzy Neural Network (FNN) was built up to evaluate concrete stmngth: It takes full advantage of the characteristics of the common concrete testing methods: drill and rebound, and the abilities of FNN including automatic learning, generation and fuzzy logic inference. The experiment shows that the max relative error of the predicted results is 1.12%, which is satisfied with the requirements of the engineering. The method effieieatly maps the complex non-linear relationship between the drill values and the rebound values, and provides a efficient way for the concrete strength inspection and evaluation.

关键词： Fuzzy neural networks Intelligent networks Concrete Inspection Application software computer science Oceans Civil engineering Intelligent systems Intelligent structures

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A modal parameters identification method based on recurrent neural networks

A modal parameters identification method based on recurrent ...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Jing Xu Qing-Chun Meng Dong-Ming Zhou Yan Ge Department of Civil Engineering Qingdao Institute of Architecture and Engineering Qingdao China Department of Computer Science Ocean University of China Qingdao China State Key Lab of Intelligent Technology and Systems Tsinghua University Beijing Beijing China

ISBN: (纸本)0780384032

This paper presents a recurrent neural network-based approach for modal parameters identification of structure-unknown systems. The proposed approach involves two steps. The first step is to build a recurrent neural network to map the complex nonlinear relation between the excitations and responses of the structure-unknown system by off-line learning. The second step is to propose a procedure to determine the modal parameters of the system from the trained neural networks. The dynamic characteristics of the structure are directly evaluated from the weighting matrices of the trained recurrent neural network. Furthermore, an illustrative example demonstrates the feasibility of using the proposed method to identify modal parameters of structure-unknown systems. The method proposed can be used to research on fault diagnosis of engineer structure.

关键词： Parameter estimation Recurrent neural networks Neural networks MIMO Artificial neural networks Network topology Cybernetics Nonlinear dynamical systems Nonlinear equations Frequency domain analysis

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Performance of new broadcast forwarding criteria in MANET

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International Conference on Information Networking, ICOIN 2004

作者： Zhu, Lijuan Lee, Bu-Sung Seet, Boon-Chong Wong, Kai-Juan Liu, Genping Huang, Shell-Ying Lee, Keok-Kee Centre for Multimedia and Network Technology School of Computer Engineering Singapore Network Technology Research Centre Research TechnoPlaza Nanyang Technological University 4th Storey Nanyang Avenue 639798 Singapore Institute for Computing Systems Architecture Informatics University of Edinburgh JCMB Mayfield Road EdinburghEH9 3JZ United Kingdom

ISBN: (纸本)3540230343

In a mobile ad hoc network (MANET), packet broadcast is common and frequently used to disseminate information. Broadcast consume large amount of bandwidth resource, which is scarce in MANET environment. The problem is to find the ideal forward node set so as to minimize the bandwidth consumed, which is a NP-Complete problem. In this paper we will investigate three dominant node approximation algorithms: dominant pruning, total dominant pruning and partial dominant pruning algorithm. An extension to the original algorithms, modified termination criteria, is proposed. Simulation results show that the new termination criteria ensure the same coverage using a reduced number of forward nodes. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Approximation algorithms

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A routing strategy for metropolis vehicular communications

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International Conference on Information Networking, ICOIN 2004

作者： Liu, Genping Lee, Bu-Sung Seet, Boon-Chong Foh, Chuan-Heng Wong, Kai-Juan Lee, Keok-Kee Centre for Multimedia and Network Technology School of Computer Engineering Singapore Network Technology Research Centre Research TechnoPlaza Nanyang Technological University 4th Storey Nanyang Avenue 639798 Singapore Institute for Computing Systems Architecture Informatics University of Edinburgh JCMB Mayfield Road EdinburghEH9 3JZ United Kingdom

ISBN: (纸本)3540230343

One of the major issues that affect the performance of mobile ad hoc networks (MANET) is routing. Recently, position-based routing for MANET is found to be a very promising routing strategy for inter-vehicular communication systems (IVCS). However, position-based routing for IVCS in a built-up city environment faces greater challenges because of potentially more uneven distribution of vehicular nodes, constrained mobility, and difficult signal reception due to radio obstacles such as high-rise buildings. This paper proposes a new position-based routing scheme called Anchor-based Street and Traffic Aware Routing (A-STAR), designed specifically for IVCS in a city environment. Unique to A-STAR is the usage of information on city bus routes to identify an anchor path with high connectivity for packet delivery. Along with a new recovery strategy for packets routed to a local maximum, the proposed protocol shows significant performance improvement in a comparative simulation study with other similar routing approaches. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Stars

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8.6.2 Maintainability Considerations for Software Intensive systems

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INCOSE International Symposium 2004年第1期14卷 1797-1809页

作者： Ramchand, Ramya Tatikonda, Nirmala Verma, Dinesh Nance, Richard E. System Integration Laboratory Stevens Institute of Technology HobokenNJ07030 United States Systems Research Center Virginia Tech BlacksburgVA24060 United States Dept. of Systems Engineering & Engg. Mgmt Stevens Institute of Technology HobokenNJ07030 United States Dept. of Computer Science Virginia Tech BlacksburgVA24060 United States

This paper reflects one aspect of an overall research initiative to better understand and articulate the "cause and effect" relationship between design causes and operational effects. Here the specific focus is on "before the fact" system maintainability. Maintenance considerations for software intensive systems must be addressed early in design and must focus on the entire system life cycle. Use of commercial-off-the-shelf (COTS) components in system architectures reinforces this need. COTS usage can be readily observed in modern commercial and defense systems. Such architectures are often characterized by an evolving physical baseline (technology refreshment) driven by obsolescence considerations. This paper proposes aspects of a framework to evaluate system architectures, with a particular focus on system maintainability and with the objective of positively influencing the long-term cost of operational maintenance. © 2004 The Authors.

关键词： Maintainability

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8.6.3 Maintenance Practices and Metrics across Defense and Commercial systems

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INCOSE International Symposium 2004年第1期14卷 1810-1820页

systems and software engineering are converging disciplines with increasing evolution of modern complex systems towards increased information and knowledge content. Further, with the capital investment associated with such systems and their long operational life spans, a longer-term notion of quality during design and implementation is necessary. The realities of cost, safety, and staffing considerations are forcing increasing emphasis on reuse and reengineering strategies. This imperative becomes even more urgent with the thrust towards the inclusion of commercial-off-the-shelf components in system architectures. One key operational imperative for complex systems is the cost of maintenance. This paper presents an industry survey conducted to understand maintenance practices prevalent in commercial and defense industries. Results from an industry survey focused on system maintenance measures and metrics are also presented. This survey focused on information and knowledge intensive systems and was supported by INCOSE-The International Council on systems engineering and SOLE-The International Society of Logistics. © 2004 The Authors.

关键词： Investments

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Image improvement in pinhole SPECT using complete data acquisition combined with statistical image reconstruction

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International Congress Series 2004年第C期1265卷 101-105页

作者： Zeniya, Tsutomu Watabe, Hiroshi Aoi, Toshiyuki Kim, Kyeong Min Teramoto, Noboru Hayashi, Takuya Sohlberg, Antti Kudo, Hiroyuki Iida, Hidehiro Department of Investigative Radiology National Cardiovascular Center Research Institute Suita Osaka 565-8565 5-7-1 Fujishiro-dai Japan Department of System Science Graduate School of Informatics Kyoto University Kyoto 606-8501 Yoshida-Honmachi Sakyo Japan Department of Clinical Physiology and Nuclear Medicine Kuopio University Hospital FIN-70211 Kuopio P.O. Box 1777 Finland Department of Computer Science Graduate School of Systems and Information Engineering University of Tsukuba Ibaraki 305-8573 1-1-1 Tennoudai Tsukuba Japan

Pinhole single-photon emission computed tomography (SPECT) with high spatial-resolution is suitable for small-animal imaging, but has limitations associated with spatial-resolution inhomogeneity or axial blurring. We have hypothesized that this blurring is due to incompleteness of projection data acquired by a single circular pinhole orbit. And we have developed a pinhole SPECT system with two circular orbits which satisfy Tuy's condition so as to provide complete data for 3D pinhole SPECT reconstruction within the whole field-of-view (FOV);a dedicated 3D ordered subsets expectation maximization (3D-OSEM) reconstruction method for two-orbit data. This study is aimed at evaluating accuracy and impact of this system. In this system, not the camera but the object rotates and the two orbits are 90° and 45° relative to object's axis. Experiments using a multiple-disk phantom filled with ^99mTc solution and a mouse bone scan using ^99mTc-labeled HMDP agent were carried out. The Feldkamp's filtered back-projection (FBP) method and the 3D-OSEM method were applied to these data sets. The axial blurring was apparent on images reconstructed by FBP for single-orbit data, while the 3D-OSEM using two-orbit data dramatically improved the resolution homogeneity and statistical noise property, and also demonstrated considerably better image quality in the mouse scan. © 2004 Elsevier B.V.

关键词： Complete data acquisition Pinhole SPECT Small animal Statistical image reconstruction Tuy's condition

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Preface

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2004年 2981卷 V-VI页

作者： Müller-Schloer, Christian Ungerer, Theo Bauer, Bernhard University of Hannover Institute of Systems Engineering System and Computer Architecture - SRA Appelstr. 4 Hannover Germany University of Augsburg Institute of Informatics Augsburg Germany University of Augsburg Department of Software Engineering and Programming Languages Augsburg Germany

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Erratum: “Efficient center-line extraction for quantification of vessels in confocal microscopy images” [Med. Phys.30, 204–211 (2003)]

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Medical Physics 2004年第9期31卷 2726-2726页

作者： Mahnaz Maddah Ali Afzali-Kusha Hamid Soltanian-Zadeh Department of Electrical and Computer Engineering University of Tehran Tehran Iran School of Intelligent Systems Institute for Studies in Theoretical Physics and Mathematics Tehran Iran Department of Electrical and Computer Engineering University of Tehran Tehran Iran School of Intelligent Systems Institute of Studies in Theoretical Physics and Mathematics Tehran Iran Department of Radiology Henry Ford Health System Detroit Michigan 48202

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