Uncertainty and reduction of variable precision multigranulation fuzzy rough set

Variableprecisionroughset(VPRS)isanextensionofroughsettheory(RST).Bysettingthresholdvalueβ,VPRSloose

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The original rough set model, i.e., Pawlak’s single-granulation rough set model has been extended to

Attribute reduction is one of the core issues of the rough set theory. The traditional method of att

A Kind of Fuzzy set for rough fuzzy Sorting Method

Multigranulation rough sets (MGRS) is one of desirable directions in rough set theory, in which lowe

The concept of a consistent approximation representation space is introduced. Many types of informat

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The primitive notions in rough set theory are lower and upper approximation operators defined by a f