Study of New Valued Tolerance Relation in Incomplete Information System

The valued tolerance relation in the extension rough set model is studied and a new valued method is proposed in this article. The new method considers valued tolerance relation will be affected by the number and value of the known attributes, degree of correlation between known attributes and unknown attributes, and the similarity between the individual objects. A particular computing method is present and the characters of the new method are summarized. Also, we prove the method is reasonable by deduction and an instance.