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Zhang, Zhiming

An interval-valued rough intuitionistic fuzzy set model. (English) Zbl 1193.93129

Int. J. Gen. Syst. 39, No. 2, 135-164 (2010).
Summary: Rough set theory is a powerful tool for dealing with uncertainty, granuality and incompleteness of knowledge in information systems. This paper presents an interval-valued rough Intuitionistic Fuzzy (IF) set model by means of integrating the classical Pawlak rough set theory with the interval-valued IF set theory. In this paper, we first introduce some concepts and properties of interval-valued IF set theory. Then, the rough approximations of an interval-valued IF set in the classical Pawlak approximation space and the generalised Pawlak approximation space are respectively defined, and some fundamental properties of the approximation operators are studied. Furthermore, by employing cut sets of interval-valued IF sets, classical representations of interval-valued rough IF approximation operators are presented, and the connections between special binary relations and interval-valued rough IF approximation operators are constructed. Finally, we discuss the knowledge reduction and knowledge discovery of the interval-valued IF information systems.

Cited in 3 Documents

MSC:

93C42 Fuzzy control/observation systems
93A10 General systems
93C41 Control/observation systems with incomplete information

Keywords:

approximation operators; rough sets; interval-valued intuitionistic fuzzy sets; interval-valued rough intuitionistic fuzzy sets; knowledge reduction; knowledge discovery
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\textit{Z. Zhang}, Int. J. Gen. Syst. 39, No. 2, 135--164 (2010; Zbl 1193.93129)
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