Fuzzy Relational Database And Its Application

Fuzzy database is an important incomplete information management method. In this paper,at first,the latest development and research have been summarized. Secondly,based on the classification of fuzzy set semantics,we give a new definition on data type. Thirdly,by new data types,we give a new fuzzy relational database management system (FRDBS) database language (DBL) and a new quotient operator based on the semantics in fuzzy relational database. Fourthly,this paper puts forward "UP" operator and "DOWN" operator for fuzzy data conversion,and based on these operators a new rules discovery algorithm is investigated. Finally,this paper presents way to apply FDBMS and rules miner in fuzzy information management and decision system. The experiments show that the FRDBMS and rules discovery algorithm is available.