摘要
通过粗糙隶属度函数 ,将粗集理论与模糊理论联系起来 ,建立一种粗集理论与模糊理论的关系。利用这种关系 ,引入置信水平 ,将经典粗糙集模型进行了推广 ,并讨论等价关系变化前后集合上下近似之间的关系。
In this paper, we combine the fuzzy set theory with rough set theory by rough membership function and establish a relation between them. The classic rough set model is generalized by introducing the belief level and the differences of the upper(lower) approximations generated by the change of the equivalence relation is discussed by using this relation.
出处
《模糊系统与数学》
CSCD
2002年第2期69-73,共5页
Fuzzy Systems and Mathematics
关键词
粗集
模糊集
截集
变精度粗糙集模型
等价关系
上(下)近似
Rough Set
Fuzzy Set
Cut Set
Variable Precision Rough Sets Model
Equivalence Relation
Upper(Lower) Approximation
