Font Size: a A A

Fuzzy Concept Lattice And Dynamic Formal Context Related Reasearch

Posted on:2013-01-06Degree:MasterType:Thesis
Country:ChinaCandidate:X J ZhangFull Text:PDF
GTID:2210330371995727Subject:Applied Mathematics
Abstract/Summary:PDF Full Text Request
As is known, the information of everyday life is almost vague. Such as "tall","short" and "young" etc. As attributes they are vague. Thus, the analysis of fuzzy formal context and fuzzy concept lattices is closer to real life, so has more practical significance. In the same time, there exist a thing or phenomenon in our life, which changes over time in some law. And the thing or phenomenon can be seen as a relatively static, unchanging in a certain period.On the basis of previous study, this paper in view of the above two phenomenon, starts from the formal context. It studies not only fuzzy formal context and fuzzy concept lattice but also dynamic formal context and the concept lattice. In practical terms, this paper mainly do the several following parts work:In the first part, we discussed the fuzzy reasoning method based on fuzzy concepts. Specifically,we established the reasoning model based on fuzzy concepts, then we applied the Mamdani fuzzy inference method, and the thoughts of FITA and FATI thoughts. By ways of first infer then aggregating and first aggregating then infer, we discussed reasoning methods based on fuzzy concepts. Finally we also gave the analysis of a numerical example.In the second part, we mainly discussed the dynamic formal context. Considering the dynamic formal context as a group of static formal context, we gave the relevant definitions of dynamic formal context. And we also discussed some properties of the dynamic formal context.
Keywords/Search Tags:Concept lattice, Fuzzy reasoning, Fuzzy concept lattice, dynamic formal conte--xt
PDF Full Text Request
Related items