Generalizations of multisets and rough approximations
- 26 May 2004
- journal article
- research article
- Published by Wiley in International Journal of Intelligent Systems
- Vol. 19 (7), 639-652
- https://doi.org/10.1002/int.20015
Abstract
Three classes of generalizations of multisets are reviewed. They are real-valued multisets, fuzzy number–valued multisets, and fuzzy multisets. A family of generalized multisets that includes these three classes is proposed. A generalized multiset in this family 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
This publication has 18 references indexed in Scilit:
- Rough Sets and Multisets in a Model of Information RetrievalPublished by Springer Science and Business Media LLC ,2000
- Multisets and Fuzzy MultisetsPublished by Springer Science and Business Media LLC ,2000
- A Review of Rough Set ModelsPublished by Springer Science and Business Media LLC ,1997
- Fuzzy DatabasesPublished by Springer Science and Business Media LLC ,1996
- Basic Operations of Fuzzy MultisetsJournal of Japan Society for Fuzzy Theory and Systems, 1996
- Rough SetsPublished by Springer Science and Business Media LLC ,1991
- Fuzzy bags and applicationsFuzzy Sets and Systems, 1990
- Fuzzy Sets in Information Retrieval and Cluster AnalysisPublished by Springer Science and Business Media LLC ,1990
- Possibility TheoryPublished by Springer Science and Business Media LLC ,1988
- Persistence and extinction in continuous age-structured population modelsComputers & Mathematics with Applications, 1988