A Quantification Method of Qualitative Indices Based on Inverse Conversion Degree Functions

Qualitative Mapping(QM) is the basis of Property Theory, by which Conversion Degree Functions are induced. Furtherly Inverse Conversion Degree Functions are proposed used to convert qualitative description into quantitative value for some attributes of objects according to the degree to which the qualitative description belongs. Finally Qualitative Membership Degree Matrix based on the proportion qualitative evaluation from different levels accounts for is put forward which gives more comprehensive evaluation value of an object.