一种信息系统属性约简新方法

针对现实中的信息系统的不完备缺失属性,以及无法使用Paw lak粗糙集解决属性约简的情况,在经典的Paw lak粗糙集的基础上,引入一般关系下的粗糙集模型,并给出了基于一般关系的信息系统属性约简的定义.为了使不完备信息系统可以得到更好的属性约简,通过对非对称相似关系进行改进,提出了一种基于改进非对称相似关系的粗糙集模型,在此基础上给出了一种新的不完备信息系统的属性约简算法,并用实例说明了其有效性.

A new method to reduct information system

To define the rough set of general relation from Pawlak＇ s rough set which is not useful for attributes reduction because information systems are often incomplete and have in-complete attributes. To express attributes reduction of information system in general relation. To improve the non-symmetric similarity and to define a rough set from improved non-sym-metric similarity in order to get better attributes reduction. To propose a new algorithm and to prove it effect with an example from this rough set.