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Erschienen in:
2005 | OriginalPaper | Buchkapitel
Optimization of Concept Discovery in Approximate Information System Based on FCA
verfasst von : Hanjun Jin, Changhua Wei, Xiaorong Wang, Jia Fu
Erschienen in: Fuzzy Systems and Knowledge Discovery
Verlag: Springer Berlin Heidelberg
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This paper proposes the formal description of nondeterministic information system based on tolerance rough set theory, analyzes six cases of approximate information system, and gives the concept of strong and weak similarity. After defining tolerance rough set, combining the theories of FCA and expanding non-definable concept into non-definable attributes, non-definable objects and non-definable context, we present optimal algorithm of formal concept of approximation system. Really emulation has illustrated that the algorithm obtains a satisfied approximate concept and a shorter time complexity.