摘要
定义了变精度下近似算子与程度上近似算子的差运算,研究了其结构与性质,提出了常规算法和结构算法,拓展了程度粗糙集模型和经典粗糙集模型.最后用实例进行了计算与说明.
This paper defines a new operation,difference operation of variable precision lower approximation operator and grade upper approximation operator.Construction and properties of the new operation are studied,and regular algorithm and structural algorithm are presented.The new operation has improved graded rough set model and classical rough set model.Finally an example is given to compute and explain the new operation.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第3期106-109,共4页
Journal of Southwest China Normal University(Natural Science Edition)
基金
国家自然科学基金(10671030)
四川省科技支撑计划项目(09ZC1838)
四川师范大学科学研究基金(08KYL06)
关键词
粗糙集模型
近似算子
变精度粗糙集
程度粗糙集
rough set model
approximation operator
variable precision rough set
graded rough set
