Research on Functional Dependencies of Dynamic Fuzzy Relational Database

The functional dependency in data is an important topic in the theory of relational databases.Similarly,the functional dependency also existed in the DF relational database.First,based on dynamic fuzzy relation,dynamic fuzzy relational data model is presented;the representation of dynamic fuzzy data value is introduced.Then,dynamic fuzzy functional dependency is represented by means of dynamic fuzzy equivalent relation and its membership function;the inference rules for dynamic fuzzy functional dependency are described and proved.Finally,the normalization design of dynamic fuzzy relations is discussed.