带模糊数据的广义关系数据模型

GENERALIZING RELATIONAL DATA MODEL WITH FUZZY DATA

本文以研究模糊数据的语义和表示,以及关系数据模型的理论框架为目标,建立了带模糊数据的广义关系数据模型,得到了包括模糊值关系、模糊数据推演动态系统和模糊比较关系集的一组目标型;描述了θ-Select、θ-Join、θ-Project等广义关系运算;提出了模糊函数依赖的慨念;给出新的完整性规则。

In this paper,firstly,semantic and representation of fuzzy dataare researched.Then,taking aim at the theory frame of relationaldata model,the generalizing relational data model with fuzzy dataare created,it is divided into fuzzy value ralation,the fuzzy datainference dynamic system and the set of comparative relation;θ-Select,θ-Join and θ-Project generalizing relational calculs;fuzzyfunctional dependency,and new integrity.