摘要: … ) = V(I(x),X), where x GU, XQ U. We wou d li e to add one more … Let FAX) = 1 iff > t where t is a given threshold and XQ U. In … i = 1,...,k where XQ U. Hence the set approximations built with …
Andrzej Skowron, Jaroslaw Stepaniuk, Approximation of RelationsRSKD '93 Proceedings of the International Workshop on Rough Sets and Knowledge Discovery: Rough Sets, Fuzzy Sets and Knowledge Discovery. pp. 161- 166 ,(1993) , 10.1007/978-1-4471-3238-7_20
Zdzislaw Pawlak, Hard and Soft SetsRSKD '93 Proceedings of the International Workshop on Rough Sets and Knowledge Discovery: Rough Sets, Fuzzy Sets and Knowledge Discovery. pp. 130- 135 ,(1993) , 10.1007/978-1-4471-3238-7_15