Abstract:Roughness is an important uncertainty measure for a concept in an information system. By introducing a definition of α-knowledge granulation, a new uncertainty measure, called α-knowledge granulation based roughness (α-GKR), of a set is proposed in this paper. And then, MGKR, a special case of α-GKR measure, is deduced. It is generalized from the Pawlak's roughness and has two significant properties. In the case that two concepts in an information system provide an identical Pawlak's roughness, the new roughne… Show more
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