Title :
Generalized multisets and rough approximations
Author :
Miyamoto, Sadaaki
Author_Institution :
Inst. of Eng. Mech. & Syst., Tsukuba Univ., Ibaraki, Japan
fDate :
6/24/1905 12:00:00 AM
Abstract :
A class of generalized multisets that includes real-valued multisets, fuzzy number-valued multisets, and fuzzy multisets is proposed. A generalized multiset has a membership of a closed region on a plane for each object. Upper and lower approximations of the generalized multisets are defined whereby rough approximations of real-valued multisets, fuzzy number-valued multisets, and fuzzy multisets are derived. Applications to fuzzy databases and information retrieval are suggested
Keywords :
fuzzy set theory; information retrieval; relational databases; rough set theory; fuzzy databases; fuzzy number-valued multisets; generalized multisets; information retrieval; lower approximations; real-valued multisets; rough approximations; upper approximations; Application software; Arithmetic; Data structures; Fuzzy sets; Fuzzy systems; Information processing; Information retrieval; Information technology; Relational databases; Systems engineering and theory;
Conference_Titel :
Fuzzy Systems, 2002. FUZZ-IEEE'02. Proceedings of the 2002 IEEE International Conference on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-7280-8
DOI :
10.1109/FUZZ.2002.1005087
