一种基于语义的模糊关系数据库除操作

Quotient Operators of Fuzzy Relational Database Based on the Semantics

模糊信息的描述和处理只有符合自然语义才能反映事物本来面目.本文分析了传统关系数据库除操作,讨论了模糊关系数据库除操作的一般扩展形式和基于语义的运算方法——NQ扩展和运算。提出了除操作运算结果的个体活动满意度和团队活动满意度两种查询语义,并在此基础上给出了一种新的基于语义的模糊关系数据库除操作扩展和运算方法——PAT扩展和运算.通过实验测试和对比,结果表明PAT方法能使模糊信息的描述更逼近自然语义.

To model the real world, the representation and processing of fuzzy information must be close to their natural semantics. In this paper, by introducing the quotient operator in the conventional relational database and analyzing the usually methods of extended quotient operator based on the semantics in fuzzy relational database, we defined two kinds of querying semantics of quotient result, and put forward a new form and a new method. In the rest of paper, experimental results are presented, which shows that with the new form and method, the quotient results are more fit for their natural semantics.