关键词: 属性粒化, 属性聚类, Wille概念格, 面向对象概念格

Abstract:

Multigranulation formal concept analysis is one hot topic in the research area of formal concept analysis, among others, attribute clustering and attribute granulation are two representative methods. This paper performs a comparative study between these two methods based on Wille formal concept analysis. A type of Wille concept analysis model has been introduced based on attribute clustering, and then it has been shown that the model based on attribute granulation is a particular case based on attribute clustering. Furthermore, this paper extends object-oriented formal concept analysis model based on attribute granulation to that based on attribute clustering, and studies the changing law of extents and provides a necessary and sufficient condition for the fact that the extents remain unchanged after clustering, the obtained results further generalize the existing results.

Key words: attribute granulation, attribute clustering, Wille concept lattice, object-oriented concept lattice