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在不完备信息系统中,容差关系过于宽松,而相似关系则过于严格.根据这样的解释,提出了一种新的基于可变精度分类的拓展粗糙集模型,其中的分类方式相比较于容差关系和相似关系显得更为灵活,是这两者的一种广义化表现形式,且可变精度分类也是限制容差关系的一种改进形式.在此基础上,将这种拓展粗集模型与基于容差关系和相似关系的拓展粗集模型进行了对比分析.最后在不完备信息系统中使用新的拓展粗集模型讨论了确定和可能性规则的直接生成方法,并进行了实例分析以说明其有效性.
In the incomplete information system, the tolerance is too loose, but the similarity is too strict.According to this explanation, a new extended rough set model based on variable precision classification is proposed, in which the classification methods are compared The difference relation and the similarity relation appear to be more flexible, which is a kind of generalization manifestation of the two, and the variable precision classification is also an improved form to limit the tolerance. On the basis of this, Which is compared with the extended rough set model based on tolerance and similarity.Finally, a new extended rough set model is discussed in the incomplete information system to discuss the direct generation method of the determination and possibility rules, and an example analysis Explain its effectiveness.