单向IS—粗集及其一般结构  

One direction improper singular rough sets and its general structures

作　　者：郭志林[1] 王宁[1] 

机构地区：[1]商丘师范学院数学系,河南商丘476000

出　　处：《商丘师范学院学报》2009年第6期33-36,共4页Journal of Shangqiu Normal University

基　　金：河南省自然科学基金资助项目(0511013700);河南省教育厅自然科学基金资助项目(200510483002)

摘　　要：在S-粗集理论的基础上,给出单向IS-粗集(one direction improper singular rough sets)的概念及其数学结构,并讨论了单向IS-粗集上、下近似算子的性质及IS-粗集与S-粗集和Z.Pawlak粗集的关系.Based on the theory of S - rough sets, this paper puts forward concepts of one direction improper S - rough sets and its general mathematics structures. Discussed above, under approximate operator nature of one direction improper singular rough sets, and the relationship of improper singular rough sets, singular rough sets and rough sets.

关 键 词：S-粗集 单向IS-粗集 α-迁移 近似算子 

分 类 号：O159[理学—数学]