期刊
INFORMATION SCIENCES
卷 177, 期 22, 页码 4883-4892出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ins.2007.05.031
关键词
formal concept analysis; fuzzy concept lattice; fuzzy logic; Galois connection; variable threshold concept lattice
In this paper, the definition of a variable threshold concept lattice is introduced. Based on a Galois connection, three kinds of variable threshold concept lattices, in which diverse requirements of knowledge discovery can be satisfied by adjusting a threshold, are defined. The number of formal concepts in a variable threshold concept lattice is far less than that in a fuzzy concept lattice. The three kinds of variable threshold concept lattices are constructed between two crisp sets, between a crisp set and a fuzzy set, and between a fuzzy set and a crisp set. Their properties are analogous to that of the classical concept lattices, and can be induced by the fuzzy concept lattice. (C) 2007 Elsevier Inc. All rights reserved.
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