变精度对偶概念格的构造及其性质  

Construction and properties of variable threshold dual concept lattices

作　　者：宋笑雪[1,2] 张文修[2] 黄素萍[1] 

机构地区：[1]咸阳师范学院信息工程学院,陕西咸阳712000 [2]西安交通大学理学院信息与系统科学研究所,西安710049

出　　处：《计算机工程与应用》2011年第17期56-60,共5页Computer Engineering and Applications

基　　金：陕西省科技厅计划项目基金(No.2009JM8021);陕西省教育厅项目基金(No.07JK422;No.08JK481);咸阳师范学院专项科研基金项目(No.06XSYK282)

摘　　要：形式概念分析作为进行数据分析的有效工具,吸引了世界各地研究者的关注。由于二值形式背景的局限性,人们将模糊集引入形式概念分析。但是模糊形式背景生成的模糊概念数量庞大。讨论了基于模糊形式背景的模糊对偶概念格的概念约简,构造出了模糊对偶概念格的三种变精度概念格,讨论了它们的关系。结果表明每一种变精度概念格都保留了模糊对偶概念格中相对重要的概念。变精度对偶概念格的概念数量远远少于模糊对偶概念格的概念数。Formal Concept Analysis（FCA）,as a useful tool to deal with data,has recently received wide attention on the research areas,Because of the limits of two-value formal contexts, fuzzy set has been introduced into FCA.The primary problem coming with this is the enormous number of fuzzy concepts.The conceptual reduction of fuzzy dual concept lattices is discussed.Three methods to construct variable threshold dual concept lattices are given, and the relations of them are discussed.The results show that the number of concepts in variable threshold dual concept lattices is less than that in fuzzy dual concept lattices,and the important concepts are preserved.

关 键 词：Galois连接 模糊形式背景 模糊对偶概念格 变精度对偶概念格 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]