Disjunctive set-valued ordered information systems based on variable precision dominance relation

  • Authors:

  • Guoyin Wang;Qingshan Yang;Qinghua Zhang

  • Affiliations:

  • Institute of Computer Science & Technology, Chongqing University of Posts and Telecommunications, Chongqing, P.R. China;Institute of Computer Science & Technology, Chongqing University of Posts and Telecommunications, Chongqing, P.R. China;Institute of Computer Science & Technology, Chongqing University of Posts and Telecommunications, Chongqing, P.R. China

  • Venue:
  • RSFDGrC'11 Proceedings of the 13th international conference on Rough sets, fuzzy sets, data mining and granular computing
  • Year:
  • 2011

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Abstract

Through analyzing limitations of four existing dominance relations in disjunctive set-valued information systems, a variable precision dominance relation is proposed, and an extended rough set model based on the variable precision dominance relation is defined. In order to derive much simpler attribute representation, a discernibility matrix is defined, and an attribute reduction method based on the discernibility matrix is developed.