Rough Approximations Based on Valued Tolerance Relations

• Autorzy: Qin K. , Luo J. , Pei Z.

Identyfikatory

DOI

10.3233/FI-2015-1290

• Języki publikacji: EN

Abstrakty

EN

Rough set approach for knowledge discovery in incomplete information systems has been extensively studied. This paper conduct a further study of valued tolerance relation based rough approximations. We make an analysis of the existing rough approximabilities and propose a new approach for lower (upper) approximability, which is a generalization of Pawlak approximation operators for complete information system. The approach has also been generalized to fuzzy cases. Some basic properties of the approximation operators are examined.

Słowa kluczowe

EN

rough set; tolerance relation; valued tolerance relation; lower approximability; upper approximability

• Wydawca: IOS Press
• Czasopismo: Fundamenta Informaticae
• Rocznik: 2015
• Tom: Vol. 142, nr 1-4
• Strony: 183--194
• Opis fizyczny: Bibliogr. 21 poz., tab.

Twórcy

autor

Qin K.

• College of Mathematics Southwest Jiaotong University Chengdu, Sichuan 610031, China

autor

Luo J.

• College of Mathematics Southwest Jiaotong University Chengdu, Sichuan 610031, China

autor

Pei Z.

• Center for Radio Administration and Technology Development Xihua University Chengdu, Sichuan 610039, China

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