通过分析Ziarko变精度粗糙集模型的不足,引入误差参数α(0≤α〈0.5),定义了基于多数包含关系的广义变精度粗糙集模型;讨论了该模型中α上、下近似算子的性质;验证了当|R_p(x)|·α=k时,广义变精度粗糙集模型退化为程度粗糙集模型;最后,举例说明了该模型在数据挖掘中的应用.
To make up for the drawbacks of general relations of rough set model, we introduce error parameter α(0 ≤α〈0.5) and define the generalized variable precision rough set model based on the majori- ty of inclusion relation.The properties of α upper and lower approximation operators are discussed in the model.Meanwhile,if|Re(x) |α = k, it is the degraded rough set model. Finally, examples are given to show that this model can be applied to data mining.