Computer Engineering and Applications ›› 2011, Vol. 47 ›› Issue (29): 154-157.

• 数据库、信号与信息处理 • Previous Articles     Next Articles

Strong partial reflexive binary relation-based generalized rough set

MA Zhouming,LI Jinjin   

  1. Department of Mathematics and Information Science,Zhangzhou Normal University,Zhangzhou,Fujian 363000,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-10-11 Published:2011-10-11

严格局部自反关系下的广义粗糙集

马周明,李进金   

  1. 漳州师范学院 数学与信息科学系,福建 漳州 363000

Abstract: The classical rough set theory is an uncertain approach,which is based on the equivalence relation.The generalized rough set is researched based on a binary relation,which is not only widening application but also interpretation of the classical rough set.On the basis of considering reflexive approximate operators,this paper presents the definition of strong partial reflexive binary relation,discusses the properties of corresponding generalized rough set,gives its axiomatic characterizations.Combining the strong partial reflexive approximate operator,accurate sets are investigated in the generalized rough set based on a binary relation.Some important conclusions are achieved.

Key words: rough set, equivalence relation, strong partial reflexive relation, axiomatic characterizations, accurate sets

摘要: 经典粗糙集是在等价关系基础上建立的一类不确定性理论方法。研究一般二元关系下的广义粗糙集,不仅可以拓宽粗糙集理论的应用范围,而且也能从一定的角度进一步阐释经典粗糙集的基本性质。在考虑自反粗糙近似算子的基础上,提出了严格局部自反关系的定义,讨论了严格局部自反关系下广义粗糙集的性质,给出了其公理化特征。结合自反粗糙近似算子,研究了一般二元关系下广义粗糙集中的精确集,得出了一些重要的结论。

关键词: 粗糙集, 等价关系, 严格局部自反关系, 公理特征, 精确集