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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.
The purpose is to explore a new rough set expansion model combining with the accuracy and degree.From the logical difference operation between degree and precision, a logical difference rough set model is defined in degree and accuracy.In the model, through the transformation formula , The logical difference approximation operator of degree and precision is studied and the power function of approximation operator is obtained.With the difference between the degree and the precision of the logical rough set model, the degree rough set model and the classical rough set model are extended, The corresponding properties of the approximate operator power are obtained in the model.