Generalised fuzzy multivalued dependencies in a fuzzy relational data model

被引：0
|
作者：
Bhattacharjee, TK
Majumdar, AK
机构：
[1] Ctr Variable Energy Cyclotron, Dept Atom Energy, Calcutta 700064, W Bengal, India
[2] Indian Inst Technol, Dept Comp Sci & Engn, Kharagpur 721302, W Bengal, India
来源：
IETE JOURNAL OF RESEARCH | 1998年 / 44卷 / 4-5期
关键词：
relational database; fuzzy logic; fuzzy relations; fuzzy relational data model; fuzzy multivalued dependencies;
D O I：
10.1080/03772063.1998.11416045
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A generalised definition of fuzzy multivalued dependencies (FMVD) is introduced. It is shown that Armstrong's axioms for classical multivalued dependencies (MVD) hold in this generalised fuzzy environment as well. We found out necessary conditions for FMVDs to hold in two-tuple relations and sub-relations. This provides us a method to extend inferences from two-tuple subrelations to their parent relations, The proof procedures for the inference rules are based on these relationship.
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页码：191 / 197
页数：7
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