摘要
引入了基于k阶二元关系的区间值模糊粗集的概念,研究了当二元关系分别为(弱)欧几里得、串行、自反、对称、传递关系时上(下)近似算子的性质.
This paper introduces the notion of interval-valued fuzzy rough sets based on k-step-rela- tion, using these notions, the interval-valued fuzzy rough approximation operators are studied in the case of reflexive, symmetric and transitive crisp relations.
出处
《聊城大学学报(自然科学版)》
2013年第1期16-20,25,共6页
Journal of Liaocheng University:Natural Science Edition
基金
山东省中青年科学家科研奖励基金(BS2010SF004)
关键词
粗糙集
区间值模糊粗糙集
k阶二元关系
等价
rough set, interval-valued fuzzy rough set, k-step-relation, equivalence