DocumentCode
1642828
Title
Generalized multisets and rough approximations
Author
Miyamoto, Sadaaki
Author_Institution
Inst. of Eng. Mech. & Syst., Tsukuba Univ., Ibaraki, Japan
Volume
1
fYear
2002
fDate
6/24/1905 12:00:00 AM
Firstpage
751
Lastpage
756
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;
fLanguage
English
Publisher
ieee
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
Type
conf
DOI
10.1109/FUZZ.2002.1005087
Filename
1005087
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