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Evaluation Method of Web Site Structure Based on Web Structure Mining

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wuhan University Journal of Natural Sciences 2003年第3A期8卷 791-796页

作者： Li Jun\|e 1., Zhou Dong\|ru 2.1. Computer Center,{1. University, wuhan 430072. hubei, China 2. {2. of Computer,{1. University, wuhan 430072. hubei,China wuhan University Computer Center Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) wuhan University School of Computer Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***)

The structure of Web site became more complex than before. During the design period of a Web site, the lack of model and method results in improper Web structure, which depend on the designer's experience. From the point of view of software engineering, every period in the software life must be evaluated before starting the next period's work. It is very important and essential to search relevant methods for evaluating Web structure before the site is completed. In this work, after studying the related work about the Web structure mining and analyzing the major structure mining methods (Page\|rank and Hub/Authority), a method based on the Page\|rank for Web structure evaluation in design stage is proposed. A Web structure modeling language WSML is designed, and the implement strategies for evaluating system of the Web site structure are given out. Web structure mining has being used mainly in search engines before. It is the first time to employ the Web structure mining technology to evaluate a Web structure in the design period of a Web site. It contributes to the formalization of the design documents for Web site and the improving of software engineering for large scale Web site, and the evaluating system is a practical tool for Web site construction.

关键词： web structure mining page\|rank web structure evaluation modeling language for web structure

On the Symmetry Classes of Functions

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wuhan University Journal of Natural Sciences 2005年第5期10卷 813-816页

作者： ZHU Ping~1,2. FAN Yun~3 1. school of mathematics and {2., wuhan University, wuhan 430072. hubei, China 2. school of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China 3. school of mathematics and {2., Huazhong Normal University, wuhan 430079, hubei, China wuhan University School of Mathematics and Statistics Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) Beijing University of Posts and Telecommunications School of Science Beijing China (GRID:grid.31880.32) Huazhong Normal University School of Mathematics and Statistics Wuhan Hubei China (GRID:grid.411407.7) (ISNI:***)

Let R be an integral domain of characteristic zero such that the corresponding group rings have block decompositions. We first prove that the submodule consisting of all the R-valued ξi-symmetric functions of several variables is a symmetry class, where ξi is any block character. Then we present a relationship among certain operators introduced for block character. Then we present a relationship among certain operators introduced for block characters. As a consequence, we obtain a decomposition of an arbitrary R-valued function of several variables. Finally, we describe the symmetry property of such summands and determine all the symmetry classes.

关键词： symmetry class strict symmetry class blockcharacter ξi-symmetric function block idempotent

Electronic Structure of Doped Trans-Polyacetylene

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wuhan University Journal of Natural Sciences 2002年第1期7卷 51-53页

作者： Ren Da-zhi 1.2. Zhuang Wei 2. Wang Jun 2.1. wuhan University Journals Press,wuhan {2.hubei,China 2. school of Physics and Technology, wuhan University, wuhan {2.hubei,China wuhan University Journals Press Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) wuhan University School of Physics and Technology Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) wuhan University School of Physics and Technology Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***)

The behavior of electronic structures of doped trans-polyacetylene is revealed by a simple method. (C2.H2.)+n is used to simulate p-type doped trans-polyacetylene at various doping concentrations. The electronic structure is calculated, by CNDO/2.method. These calculations show that at low doping level, the decrease of electronic energy compensates the increase of elastic energy, thus the bond alternation exists, and the charge carriers are solitons. When doping level is high, the increase of elastic energy is larger than the decrease, of electronic energy, the bond alternation disappears, solitons no longer exist, and polyacetylene is in a metalic state.

关键词： trans polyacetylene CNDO/2 electronic structure doped

A Principal Theorem of Normal Discretization Schemes for Operator Equations of the First Kind

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wuhan University Journal of Natural Sciences 2001年第4期6卷 767-768页

作者： Du Nai lin 1. Wang Hannah 2.1.{1. of mathematics and {2., wuhan University, wuhan 430072. China 2. {1. of Foreign Languages and Literature,wuhan University,wuhan 430072.China wuhan University School of Mathematics and Statistics Wuhan China (GRID:grid.49470.3e) (ISNI:***) wuhan University School of Foreign Languages and Literature Wuhan China (GRID:grid.49470.3e) (ISNI:***)

The authors announce a newly-proved theorem of theirs. This theorem is of principal significance to numerical computation of operator equations of the first kind.

关键词： operator equation of the first kind normal discretization scheme pure pseudoinverse

Polarity for a Class of Levy Processes

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wuhan University Journal of Natural Sciences 2002年第4期7卷 394-398页

作者： Wu Chuan ju 1.2., Liu Lu qin 1.1. {1. of mathematics and {2., wuhan University, wuhan 430072. hubei, China 2. College of Urban Construction, wuhan University of Science and Technology, wuhan 430070, hubei, China wuhan University School of Mathematics and Statistics Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) wuhan University of Science and Technology College of Urban Construction Wuhan Hubei China (GRID:grid.412787.f) (ISNI:***) wuhan University School of Mathematics and Statistics Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***)

Polar set of Markov processes is an important concept in probabilistic potential theory, but it is not easy to judge the polarity of the sets. In this paper, we give some results which can be easily used to examine the polarity of the sets whenX t belongs to a special class of Levy processes. We also give a result about polar functions of symmetric stable processes.

关键词： Levy process subordinator (essentially) polar set polar function

An Overview on Wavelet Software Packages

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wuhan University Journal of Natural Sciences 2001年第Z1期6卷 593-600页

作者： Fan Qi\|bin 1. Li Hong 2.1. {1. of mathematics and {2., wuhan University, wuhan 430072. China 2. {1. of Electronic Information, wuhan University, wuhan 430072. China school of {1. and {2. Wuhan University Wuhan China school of Electronic Information Wuhan University Wuhan China

Wavelet analysis provides very powerful problem\|solving tools for analyzing, encoding, compressing, reconstructing, and modeling signals and images. The amount of wavelets\|related software has been constantly multiplying. Many wavelet analysis tools are widely available. This overview represents a significant survey for many currently available packages. It will be of great benefit to engineers and researchers for using the toolkits and developing new software. The beginner to learning wavelets can also get a great help from the review. If you browse around at some of the Internet sites listed in the reference of this paper, you may find more plentiful wavelet resources.

关键词： wavelet transforms image compression matching pursuit lifting MATLAB

Hierarchical Classification of Chinese Documents Based on N grams

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wuhan University Journal of Natural Sciences 2001年第Z1期6卷 416-422页

作者： Zhou Shui geng 1. Guan Ji hong 2. He Yan xiang 2.1. State Key Laboratory of Software Engineering, wuhan University, wuhan {2. China 2. school of Computer Science, wuhan University, wuhan {2. China State Key Laboratory of Software Engineering Wuhan University Wuhan China school of Computer Science Wuhan University Wuhan China

We explore the techniques of utilizing N gram information to categorize Chinese text documents hierarchically so that the classifier can shake off the burden of large dictionaries and complex segmentation processing, and subsequently be domain and time independent. A hierarchical Chinese text classifier is implemented. Experimental results show that hierarchically classifying Chinese text documents based N grams can achieve satisfactory performance and outperforms the other traditional Chinese text classifiers.

关键词： Chinese text classification N grams feature selection hierarchical classification

A Note on the Multifractal Decomposition of Directed Graph Self Similar Sets

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wuhan University Journal of Natural Sciences 2004年第3期9卷 269-272页

作者： Zheng Shui-cao 1.2., Hu Di-he 1. 1. {1. of mathematics and {2., wuhan University , wuhan 430072. hubei, China 2. The Basic Teaching Department, Jimei University, Xiamen 361.2., Fujian, China wuhan University School of Mathematics and Statistics Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) Jimei University The Basic Teaching Department Xiamen Fujian China (GRID:grid.411902.f) (ISNI:***) wuhan University School of Mathematics and Statistics Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***)

We investigated the directed graph self similar sets under some weak overlapping condition. We get the multifractal decomposition formulas for these sets, i. e., dimK u a =DimK u a =f(a), wheref is the multifractal spectral function of the directed graph self similar measure, Especially, the results improve that of Edgar and Mauldin to the case which allows certain overlapping. Key words Hausdorff dimension - Hausdorff measure - multifractal decomposition CLC number O 2.1. 6 Foundation item: Supported by the National Natural Science Foundation of China (1.371.92. and the Foundation of wuhan UniversityBiography: Zheng Shui-cao (1.73-), male, Ph. D candidate, research direction: stochastic processes and random fractals.

关键词： Hausdorff dimension Hausdorff measure multifractal decomposition

A Hybrid Genetic Algorithm for Reduct of Attributes in Decision System Based on Rough Set Theory

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wuhan University Journal of Natural Sciences 2002年第3期7卷 285-289页

作者： Dai Jian\|hua 1.2., Li Yuan\|xiang 1.2.,Liu Qun 3 1. State Key Laboratory of Software Engineering, wuhan University, wuhan 430072. hubei,China 2. {2. of Computer, wuhan University, wuhan 430072. hubei, China 3. {2. of Computer Science, wuhan University State Key Laboratory of Software Engineering Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) wuhan University School of Computer Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) Chongqing University of Posts & Telecommunications School of Computer Science Chongqing China (GRID:grid.411587.e) (ISNI:***)

Knowledge reduction is an important issue when dealing with huge amounts of data. And it has been proved that computing the minimal reduct of decision system is NP-complete. By introducing heuristic information into genetic algorithm, we proposed a heuristic genetic algorithm. In the genetic algorithm, we constructed a new operator to maintaining the classification ability. The experiment shows that our algorithm is efficient and effective for minimal reduct, even for the special example that the simple heuristic algorithm can’t get the right result.

关键词： rough set reduction genetic algorithm heuristic algorithm