基于Nishino粗糙集的三支近似概念  

Three-way Approximation Concept Based on Nishino Rough Set

作　　者：李梅 万仁霞 LI Mei;WAN Renxia(School of Mathematics and Information Science,North Minzu University,Yinchuan,Ningxia 75002l,China)

机构地区：[1]北方民族大学数学与信息科学学院,宁夏银川750021

出　　处：《闽江学院学报》2022年第5期18-25,共8页Journal of Minjiang University

基　　金：国家自然科学基金(61662001);中央高校基本科研业务费专项资金(FWNX04);宁夏自然科学基金(2021AAC03203)。

摘　　要：将Nishino粗糙集引入到形式概念分析理论中,构造三支近似算子,提出了面向对象的三支近似概念,并基于参数β的不同阈值,对所提出概念中的上下近似的性质进行讨论。最后,结合实例验证三支近似概念的有效性和合理性。In this paper,Nishino rough set is introduced into formal concept analysis,and three-way approximation operators are constructed,and then object-oriented three-way approximation concept is proposed.Based on different thresholds of parameterβ,the properties of upper and lower approximation in the proposed concept are discussed.Finally,the validity and rationality of the three-way approximation concept are verified by examples.

关 键 词：变精度粗糙集 Nishino粗糙集 三支概念格 近似 

分 类 号：TP181[自动化与计算机技术—控制理论与控制工程]