1NF模糊时态数据库数据模型

1NF Fuzzy Temporal Database Data Model

为了使时态数据库能够更准确的表达现实世界事物的模糊属性,使之更加符合人们对客观事物的分析判断习惯,提高据库数据模型的映射能力,优化不同种类数据的相互转换过程,符合广泛用户定义的要求,我们针对同时具有时态性和模糊性的复杂数据,着手于时态数据库模型,建立起一个能够反映模糊时态数据的1NF模糊时态数据库数据模型,以对确定的及不确定的模糊时态数据做出模拟表达,同时还做了相关规则及操作元素的语义演算和分析,并从理论上对运算模型及模糊时态映射关系进行了数学论证,从而利用模糊的时态数据将事件的不确定性映射出来,提高了时态数据库有关模糊时态信息的直观性。

In order to solve the problem of temporal database of the objective world in line with the actual abstract description,can effectively express and deal with complex objects,support for user defined data types,modeling ability,reduce the cost of different types of data conversion and other issues,in view of the complex data not only tense,but also has fuzzy characteristics,from the basic temporal database model proceed with,define a series of fuzzy temporal relational elements,and establishes a fuzzy temporal information can describe the 1NF relation algebras,theoretically,the corresponding fuzzy temporal relational al gebra mapping operation model,avoiding the fuzzy temporal database can not provide express temporal information environ ment facilities,also enhanced the existing temporal database the ability to describe the characteristics of fuzzy matters.