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Querying Data from RRDB Based on Rough Sets Theory

  • Qiusheng An
  • Guoyin Wang
  • Junyi Shen
  • Jiucheng Xu
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2639)

Abstract

Based on RRDM(Rough Relational Database Model), the querying theory of RRDB(Rough Relational Database) is analyzed from decomposition principle, projection principle and the definability of RRDB. We divide rough data querying into three types: crisp querying, rough complete querying and rough combinatorial querying. In addition, we discuss the rough data querying from the three aspects and do some computational simulation to obtain the results that are good agreement with the conclusion in this paper.

Keywords

Computational Simulation Query Data Attribute Subset Decomposition Principle Decomposition Operator 
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References

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    Beaubouef, Theresa., Frederick, E.Petry., Bill, P. Buckles.:Extension of the relational database and its algebra with rough set techniques. Computational Intelligence, Vol. 11.2 (1995) 233–245CrossRefGoogle Scholar
  2. 2.
    Sui Yuefei, Wang Ju, Jiang Yuncheng.:Rough Relational Database: the Basic Definitions. Computer Science, vol. 28.5 (2001) 122–124Google Scholar
  3. 3.
    K.Y. Hu, Y.F. Sui, Y. C. Lu et.al.:Multi-value rough set model. Computer Science, vol. 28.5 (2001) 122–124Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Qiusheng An
    • 1
    • 3
  • Guoyin Wang
    • 2
  • Junyi Shen
    • 1
  • Jiucheng Xu
    • 1
  1. 1.College of Electron and CommunicationXi’an Jiaotong UniversityXi’anChina
  2. 2.Institute of Computer Science and TechnologyChongQing University of Posts and TelecommunicationsChongqingChina
  3. 3.Shanxi Teachers UniversityLinfenChina

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