J4 ›› 2013, Vol. 48 ›› Issue (3): 37-41.

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S-rough equivalent classes and knowledge dynamic miningdiscovery

XU Feng-sheng1, YU Xiu-qing1, ZHANG Huan-li2   

  1. 1. Department of Mathematics Sciences, Dezhou University, Dezhou 253023, Shandong, China;
    2. Department of Information Engineering, Zhumadian Vocational and Technical College, Zhumadian 463000, Henan, China
  • Received:2012-10-09 Online:2013-03-20 Published:2013-03-14

Abstract:

 Based on one direction S-rough sets(one direction singular rough sets), dual of one direction S-rough sets(dual of one direction singular rough sets), the concepts and structures of S-rough equivalent classes, dual of Srough equivalent classes and rough equivalent classes are proposed. The relationship among the three kinds of equivalent classes is analysed. And attribute theorems and dynamic separate theorems about S-rough equivalent classes and dual of S-rough equivalent classes are obtained. Finally, theories about dual of Srough equivalent classes given in the paper are applied to knowledge dynamic mining-discovery.

Key words:  S-rough sets; S-rough equivalent classes; attribute theorems; dynamic separate; separate theorem; knowledge dynamic mining-discovery

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