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The set-valued decision information system and its knowledge reduction. (Chinese. English summary) Zbl 1199.68372
Summary: A new relationship based on a variable precision parameter in the set-valued decision information system, namely, a variable precision relationship, is defined. By changing the value of the parameter; the objects can be classified more reasonably. The knowledge reduction in a set-valued decision information system and its attribute feature are discussed here and the discernibility matrices are also proposed.
68T30 Knowledge representation
03E72 Theory of fuzzy sets, etc.
68U35 Computing methodologies for information systems (hypertext navigation, interfaces, decision support, etc.)