目的是结合精度与程度,探索新的粗糙集拓展模型.从程度与精度的逻辑差运算出发,定义了程度与精度的逻辑差粗糙集模型.模型中,通过变精度近似与程度近似的转化公式,研究了程度与精度的逻辑差近似算子,并得到了近似算子的幂作用等性质.用程度与精度的逻辑差粗糙集模型拓展了程度粗糙集模型、经典粗糙集模型,并在这些模型中得到了近似算子幂作用的相应性质.
This paper aims to combine precision and grade, and explore new extending rough set model. Based on logical difference operation of grade and precision, rough set model of logical difference operation of grade and precision is defined. In the new model, by transformation formulas between variable precision approximations and graded approximations, approximation operators of logical difference operation of grade and precision are studied, and properties of power action of approximation operators are obtained. The new model has ex- tended graded rough set model and classical rough set model, and similar properties of power action of approximation operators are obtained in these models.