- Tytuł:
- Fuzzy recursive relationships in relational databases
- Autorzy:
- Myszkorowski, K.
- Powiązania:
- https://bibliotekanauki.pl/articles/95091.pdf
- Data publikacji:
- 2018
- Wydawca:
- Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
- Tematy:
-
fuzzy databases
interval-valued fuzzy sets
recursive relationships
relational algebra
fixpoint operator - Opis:
- Recursive relationships are used for modelling problems coming from the real life, such as, for example, a relationship describing formal dependencies between employees of an enterprise, where creation of work groups and teams requires analysis of many elements. In conventional database systems, the precision of data is assumed. If our knowledge of the fragment of reality to be modelled is imperfect one should apply tools for describing uncertain or imprecise information. One of them is the fuzzy set theory. The paper deals with recursive relationships in fuzzy databases. The analysis is performed with the use of the theory of interval-valued fuzzy sets. A definition of a fuzzy interval recursive relationship has been presented. The paper defines different connections of entities which participate in such relationships. Operations of the extended relational algebra are also discussed.
- Źródło:
-
Information Systems in Management; 2018, 7, 1; 35-46
2084-5537
2544-1728 - Pojawia się w:
- Information Systems in Management
- Dostawca treści:
- Biblioteka Nauki
Artykuł