混合值不完备信息系统中一种拓展粗糙集模型

针对混合值不完备信息系统，提出了基于邻域联系度的拓展粗糙集模型。首先定义了一种邻域联系度容差关系，然后通过所确定出的最大相容类得到了上、下近似集，并证明了所得到的近似集是基于联系度容差关系得到的近似集的一种推广和改进，最后进行了实例分析。

Extension of rough set model in incomplete information system with hybrid value

Extension of rough set model based on neighborhood connection degree is proposed to deal with incomplete information system with hybrid value.Firstly,a definition of tolerance relation of neighborhood connection degree is given and the maximal tolerance classes are determined,then the upper approximation set and the lower approximation set are obtained and proved that these approximation sets are the extension and refinement of the ones obtained using the tolerance relation based on connection degree.Finally,an example is given to show the presented model.