Affiliations:
School of Information Science and Engineering, Lanzhou University, Lanzhou, Gansu, P.R. China
Correspondence:
[*]
Corresponding author. He Lin, School of Information Science and Engineering, Lanzhou University, No. 222
Tianshui South Road, Chengguan District, P.C. 730000, Lanzhou, Gansu, P.R. China. Tel.: +86 931 8914000 8518;
Fax: +86 931 8912778; E-mail: [email protected].
Abstract: Hybrid multi-granularity approach is a data processing mode in rough set theory. Taking the incomplete information system as the research object, variable precision rough set method and hybrid multi-granulation rough set method is fused. And this paper proposes a hybrid multi-granulation rough sets based on variable precision tolerance relations and discusses two other hybrid multi-granulation rough sets of variable precision based on similarity relation and limited tolerance relation. Basic properties of hybrid multi-granularity rough set of variable precision are discussed, which provides a new approach to deal with the incomplete information system.
Keywords: Hybrid multi-granulation rough sets, hybrid multi-granulation rough sets model of variable precision, tolerance rough set, variable precision rough sets
