Converse approximation and rule extraction from decision tables in rough set theory
Authors: Yuhua Qian, Jiye Liang, Chuangyin Dang
Abstract:
get concept under a granulation order is defined and some of its important properties are obtained, which can be used to characterize the structure of a set approximation. For a subset of the universe in an information system, its converge degree is monotonously increasing under a granulation order. This means that a proper family of granulations can be chosen for a target concept approximation according to user requirements. As an application of the converse approximation, an algorithm based on the converse approximation called REBCA is designed for decision-rule extraction from a decision table, which has a time ...
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Converse approximation and rule extraction from decision tables in rough set theory.pdf
Thu Nov 20 11:10:00 CST 2008