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Data insufficiency and information incompleteness often exist in engineering practice, resulting in the presence of epistemic uncertainty. Possibility theory is effective in dealing with epistemic uncertainty and has been applied in various domains. In possibility theory, possibility distribution is an essential concept which has to be derived from collected data. Existing methods performs well under...
RIF (Rule Interchange Format) has become W3C's candidate recommendation on rule interchange. To let RIF represent and interchange fuzzy knowledge in the Semantic Web, we propose RIF-FRD (RIF Fuzzy Rule Dialect), a rule interchange format based on fuzzy sets, defining its XML syntax and metamodel. Based on the metamodel, we propose a fuzzy RIF framework-f-RIA (fuzzy Rule Interchange Architecture),...
The paper studies the axiomatization of rough sets with a new approach, that is, the matroidal approach. First, Pawlak matroids are introduced. Properties of Pawlak matroids are studied. Then three sets of axioms of the Pawlak upper approximation operator are proposed from a matroidal point of view. Additionally, a possible generalization of Pawlak rough sets based on coverings is pointed out.
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