粗糙集上下近似的矩阵刻画及应用  

Matrix description and applications of upper and lower approximation of rough set

作　　者：李少阳[1] 李巧艳[1] 宋卫妮 

机构地区：[1]西安工程大学理学院,西安710048

出　　处：《计算机工程与应用》2015年第20期107-110,152,共5页Computer Engineering and Applications

基　　金：国家自然科学基金(No.60775038);陕西省教育厅专项科研计划项目(No.12JK0878);西安市科技计划项目(No.CXY1441(2))

摘　　要：主要对粗糙集中上下近似的矩阵刻画及应用进行了研究。给出等价关系、一般二元关系、基于邻域的覆盖粗糙集下一种上下近似的新的矩阵刻画;作为应用,提出关系矩阵方程,并对上下近似的逆问题进行了研究,即在已知关系矩阵MR上(下)近似(X)(-R(X))的情况下反解X给出了求解X的方法。The matrix description and application of upper and lower approximation of rough set have studied in this paper. The new matrix descriptions of upper and lower approximation under equivalence relations, general binary and covering rough set based on the neighborhood are given. As an application, the inverse problems of upper and lower approximation have solved by using relationship matrix equation, that is, the method to solve X is given if the relationship matrix MR and the upper approximation Rˉ（X ）（or lower approximation-R（X ））have known.

关 键 词：粗糙集 上下近似 矩阵刻画 关系矩阵方程 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程] B815[自动化与计算机技术—控制科学与工程]