S-粗集的副集η-嵌入粒度  

Assistant sets η - embedded granulation of S -rough sets

作　　者：胡海清[1] 付海艳[2] 曲贺梅 

机构地区：[1]山东大学数学与系统科学学院,山东济南250100 [2]海南师范学院计算机科学系,海南海口571158 [3]河南省中原职业技术学院,河南驻马店463000

出　　处：《海南师范学院学报（自然科学版）》2004年第1期1-5,共5页Journal of Hainan Normal University:Natural Science

基　　金：国家自然科学基金资助项目(70271048);山东省自然科学基金资助项目(Y2001G07)

摘　　要：提出单向副集AS(X°)的η-嵌入集的粒度、双向副集AS(X )的μΔγ-嵌入集的粒度等概念;提出单向副集AS(X°)的η-嵌入集的粒度特性定理,双向副集AS(X )的μΔγ-嵌入集的粒度特性定理.This paper presents granulation degree of η- embedded sets of one direction assistant sets A_S(X°) and granulation degree of μ Δ γ -embedded sets of two direction assistant sets A_S(X~*) . Moreover, it also advances granulation degree characteristic theorem of η- embedded sets of one direction assistant sets A_S(X°) and granulation degree characteristic theorem of μ Δ γ- embedded sets of two direction assistant sets A_S(X~*) .

关 键 词：S-粗集 副集 粒度 η-嵌入集 μ△γ-嵌入集 

分 类 号：O159[理学—数学]