Multivalued dependencies in fuzzy relational databases
β Scribed by R.C. Tripathy; P.C. Saxena
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 605 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0165-0114
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π SIMILAR VOLUMES
The concept of fuzzy multivalued dependencies (FMVDs) is introduced. It is concluded that FMVDs are more generalised than classical multivalued dependencies. A set of sound and complete inference rules, similar to Armstrong's axioms are proposed to derive more dependencies from a given set of FMVDs.
Based on the semantic equivalence degree the formal definitions of fuzzy functional dependencies (FFDs) and fuzzy multivalued dependencies (FMVDs) are first introduced to the fuzzy relational databases, where fuzziness of data appears in attribute values in the form of possibility attributions, as w
The queries on type-2 fuzzy relational databases may get non-reasonable answers, and as pointed out by Buckles, a tuple's membership value is not static but is a measure of the appropriateness of that tuple to a given query. Here, we use two supplementary attributes/,t, and le to model the concepts