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Proceedings - 10th IEEE International Workshop on Future Trends of Distributed Computing Systems

作者： Kang, Dazhou Xu, Baowen Lu, Jianjiang Chu, William C. Dept. of Comp. Sci. and Engineering Southeast University Nanjing 210096 China Jiangsu Inst. of Software Quality Nanjing 210096 China State Key Laboratory of Software Wuhan University Wuhan 430072 China Department of Computer Science TungHai University Taiwan

ISBN: (纸本)0769521185

UML is a good tool to represent ontologies. When using UML for Ontology development, one of the principal goals is to assure the quality of ontologies. UML class diagrams provide a static modeling capability that is well suited for representing ontologies, so the structural complexity of a UML class diagram is one of the most important measures to evaluate the quality of the ontologies. This paper uses weighted class dependence graphs to represent a given class diagrams, and then presents a structure complexity measure for the UML class diagrams based on entropy distance. It considers complexity of both classes and relationships between the classes, and presents rules for transforming complexity value of classes and different lands of relations into a weighted class dependence graphs. This method can measure the structure complexity of class diagrams objectively.

关键词： computer programming languages

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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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Proceedings of 2004 International Conference on Machine Learning and Cybernetics

作者： Xu, Jing Meng, Qing-Chun Zhou, Dong-Ming Ge, Yan Department of Computer Science Ocean University of China Qingdao 266071 China Department of Civil Engineering Qingdao Inst. of Arch. and Eng. Qingdao 266033 State Key Lab. Intelligent T./S. Tsinghua University Beijing 100084

ISBN: (纸本)0780384032

The work present 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： Recurrent neural networks

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Data transmission rate control in computer networks using neural predictive networks

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 3358卷 875-887页

作者： He, Yanxiang Xiong, Naixue Yang, Yan State Key Lab. of Software Engineering Computer School of Wuhan University Wuhan 430072 China Department of Computer Science Central China Normal University Hubei Wuhan 430079 China

The main difficulty arising in designing an efficient congestion control scheme lies in the large propagation delay in data transfer which usually leads to a mismatch between the network resources and the amount of admitted traffic. To attack this problem, this paper describes a novel congestion control scheme that is based on a Back Propagation (BP) neural network technique. We consider a general computer communication model with multiple sources and one destination node. The dynamic buffer occupancy of the bottleneck node is predicted and controlled by using a BP neural network. The controlled best-effort traffic of the sources uses the bandwidth, which is left over by the guaranteed traffic. This control mechanism is shown to be able to avoid network congestion efficiently and to optimize the transfer performance both by the theoretic analyzing procedures and by the simulation studies. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Data transfer

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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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WCICA 2004 - Fifth World Congress on Intelligent Control and Automation, Conference Proceedings

作者： Xu, Jing Meng, Qingchun Yang, Songsen Zhang, Wen Song, Changhong Department of Computer Science Ocean University of China Qingdao 266071 Department of Civil Engineering Qingdao Inst. of Arch./Engineering Qingdao 266033 State Key Lab. Intelligent T./S. Tsinghua University Beijing 100084

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 strength. 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 efficiently 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： Neural networks

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Sparse controller realisation with small roundoff noise

Sparse controller realisation with small roundoff noise

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作者： Li, G. Wu, J. Chen, S. Sch. of Elec./Electron. Engineering Nanyang Technological University Singapore 639798 Natl. Key Lab. Indust. Contr. T. Inst. of Advanced Process Control Zhejiang University Hangzhou 310027 China Sch. of Electron./Computer Science University of Southampton Highfield Southampton SO17 1BJ United Kingdom

The effect of roundoff noise in a digital controller is analysed for a digital feedback control system. An analytical expression for the roundoff noise gain, defined as the ratio between the variances of the output error and the rounding error, is obtained. The problem of identifying the minimum roundoff noise realisations can be solved using an existing procedure. Noting that the optimal realisations are fully parametrised, based on a polynomial operator approach a new sparse controller realisation is derived. This realisation is a generalisation of the direct forms in the classical shift operator and the prevailing delta-operator. It provides more degrees of freedom with which to reduce the roundoff noise. The problem of finding optimal polynomial operators can be solved by an exhaustive search, and a design example is given. It is shown that with the proposed sparse realisation the optimal polynomial operators can outperform the shift- and delta-operators.

关键词： Discrete time control systems

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Capturing semantic hierarchies to perform meaningful integration in HTML tables

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 3007卷 899-902页

作者： Li, Shijun Liu, Mengchi Wang, Guoren Peng, Zhiyong School of Computer Wuhan University Wuhan 430072 China School of Computer Science Carleton University 1125 Colonel By Drive Ottawa Ont. K1S 5B6 Canada Department of Computer Science and Engineering Northeastern University Shengyang 110004 China State Key Lab. of Software Engineering Wuhan University Wuhan 430072 China

We present a new approach that automatically captures the semantic hierarchies in HTML tables, and semi-automatically integrates HTML tables belonging to a domain. It first automatically captures the attribute-value pairs in HTML tables by normalization and recognizing their headings. After generating global schema manually, it learns the lexical semantic sets and contexts, by which it then eliminates the conflicts and solves the nondeterministic problems in mapping each source schema to the global schema to integrate the data in HTML tables. © Springer-Verlag Berlin Heidelberg 2004.

关键词： HTML

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AN ALGORITHM FOR FAULT DIAGNOSIS BASED ON COMBINATORIAL DESIGN APPROACH FOR TESTING

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Journal of Electronics(China) 2003年第3期20卷 224-226页

作者： Nie Changhai Xu Baowen Shi Liang (Dept. of computer science & Eng., Southeast Univ., Nanjing 210096) (state key lab.ratory of software Engineering, Wuhan University, Wuhan 430072) (Jiangsu key lab. of computer Info. Proc. Tech., Soochow Univ., Suzhou 215006) Dept. of Computer Science & Eng. Southeast Univ. Nanjing State Key Laboratory of Software Engineering Wuhan University Wuhan Jiangsu Key Lab. of Computer Info. Proc. Tech. Soochow Univ. Suzhou

Much research has been done mainly in testcase generation and its effect for com-binatorial design approach for testing. This letter presents an algorithm for fault diagnosis basedon the approach. It can conclude that the factors, which cause errors, must be in a very smallrange through analyzing the test cases after testing, and retesting with some complementary testcases. The algorithm can provide a very efficient and valuable guidance for the debugging andtesting of software.

关键词： software testing Combinatorial testing Fault diagnosis

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TEST COVERAGE ANALYSIS BASED ON PROGRAM SLICING

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Journal of Electronics(China) 2003年第3期20卷 232-236页

作者： Chen Zhenqiang Xu Baowen Guanjie (Dept. of computer science & Eng., Southeast Univ., Nanjing 210096) (state key lab.ratory of software Engineering, Wuhan University, Wuhan 430072) (Jiangsu key lab. of computer Info. Proc. Tech., Soochow Univ., Suzhou 215006) Dept. of Computer Science & Eng. Southeast Univ. Nanjing State Key Laboratory of Software Engineering Wuhan University Wuhan Jiangsu Key Lab. of Computer Info. Proc. Tech. Soochow Univ. Suzhou

Coverage analysis is a structural testing technique that helps to eliminate gaps in atest suite and determines when to stop testing. To compute test coverage, this letter proposes anew concept coverage about variables, based on program slicing. By adding powers accordingto their importance, the users can focus on the important variables to obtain higher test *** letter presents methods to compute basic coverage based on program structure graphs. Inmost cases, the coverage obtained in the letter is bigger than that obtained by a traditionalmeasure, because the coverage about a variable takes only the related codes into account.

关键词： software testing Testing coverage Program slicing

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MEASURING STRUCTURE COMPLEXITY OF UML CLASS DIAGRAMS

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Journal of Electronics(China) 2003年第3期20卷 227-231页

作者： Zhou Yuming Xu Baowen (Dept. of computer science & Eng., Southeast Univ., Nanjing 210096) (state key lab.ratory of software Engineering, Wuhan University, Wuhan 430072) (Jiangsu key lab. of computer Info. Proc. Tech., Soochow Univ., Suzhou 215006) Dept. of Computer Science & Eng. Southeast Univ. Nanjing State Key Laboratory of Software Engineering Wuhan University Wuhan Jiangsu Key Lab. of Computer Info. Proc. Tech. Soochow Univ. Suzhou

To provide system designer a valid measure to evaluate the structure complexityof class diagrams objectively, this letter first proposes a method to transform a class diagramsinto a weighted class dependence graph, th... 详细信息

关键词： Class diagrams Structure complexity Measure Entropy distance Dependence

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A new approach for line recognition in large-size images using hough transform

A new approach for line recognition in large-size images usi...

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16th International Conference on Pattern Recognition, ICPR 2002

作者： Song, Jiqiang Cai, Min Lyu, Michael R. Cai, Shijie Dept. Computer Science and Engineering Chinese University of Hong Kong Hong Kong Hong Kong State Key Lab. of Novel Software Technology Nanjing University Nanjing China

ISBN: (纸本)0769516963

Applications of the Hough Transform (HT) have been limited to small-size images for a long time. For large-size images, peak detection and line verification become much more time-consuming. Many HT-based line detection methods are not able to detect line width. This paper proposes a new approach for detecting line segments using HT, with applicability to large size images, especially for those situations where line width is critical. Our approach applies a boundary recorder to eliminate redundant analyses, and employs an image-analysis-based line-verification method to overcome the difficulty of using a threshold to distinguish short lines from noise. It avoids overlapping lines by removing the pixels of detected line segments, a method which is more robust than only clearing the N×N neighborhood. This approach could be easily extended to improved HT methods that perform global accumulation. Experimental results show that this approach is very time efficient for large-size images. © 2002 IEEE.

关键词： Hough transforms

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