Research On Fuzzy Relationship Database Theory And Application In Teacher Evaluation System

With the considerable application of Fuzzy Set theory in all fields of social life and production, the study of the theory of Fuzzy Relational Database, as a result, comes into being. The traditional relational Database Management System is not appropriate for dealing with these fuzzy data, because of the specialization of fuzzy data. Therefore, we resort to Fuzzy Relational Database.This article, on the basis of Fuzzy Set theory, makes a good comprement for the traditional relational database, as well as. creates Fuzzy Relational Data Model, which includes of Fuzzy Relational Model, Fuzzy Relation operation, the integrity of Fuzzy Relation and the decomposition of Fuzzy Relation. On the other hand, the author comes up with the resolution scheme on the study of storage of fuzzy data, of fuzzy judgement, in additon to, Fuzzy Relational Database Query Language(FSQL). At last, the author puts forward a comprehensive evaluation method, in which Fuzzy Relational Database is applied for evaluating the College Teachers' working quality This system gives a judgement on the teachers' target, therefore, its results are more objective, reasonable, accurate and valuable.