变精度覆盖粗糙集模型近似算子的性质

The Nature of Approximation Operators for Variable Precision Covering Rough Set Model

变精度覆盖粗糙集模型是在放宽了覆盖标准的前提下给出的,因而导致近似算子发生了变化。在介绍覆盖粗糙集模型和变精度覆盖粗糙集模型的概念的基础上,给出并证明变精度覆盖粗糙集模型的近似算子的几个性质。

The variable precision rough set model was advanced under the premise of relaxed coverage standard,which resulting in a change of approximation operators.On the basis of the introduction of covering variable precision rough set model and the concept of covering rough set model,we proved several properties of variable precision rough set model covering approximation operators.