粗的、粗糙的、近似的 rough
在程度粗糙集和变精度粗糙集的基础上，通过引入误差参数，给出了一种新的程度变精度粗糙集模型并得出了所给模型上、下近似的一些性质。
In this paper, a degree-variable precision rough set model based on variable precision rough set and the degree of rough set is proposed by introducing a concept of error parameters.
根据粗糙集上下近似的包含关系，得到概念的一种新的上下近似的运算的定义。
Based on the inclusion relation of upper approximations and lower approximations of rough set, a new definition of upper approximations and lower approximations can be obtained.
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