Aim to upwards points,in this paper,advance a knowledge roughness based approach to hybrid decision tree,select less knowledge roughness as tested attribute to construct decision tree.

Application of rough set to build transformer fault diagnosis model based on multivariate decision tree;

Principal Component Analysis-based Approach for Multivariate Decision Tree Construction;

A knowledge roughness based approach to multivariate decision tree construction;

Method to diagnose networks fault based on univariate decision tree;

It is difficult for univariate decision tree to reflect the relationship of attributes,multivariate decision tree can resolve this problem preferably,the former produces big tree,the latter gains simple tree but difficult to explain.

Research on mining rules from incomplete information systems based on multivariable decision tree;

The paper presents a multivariable Decision Tree Algorithm on the use of attribute reduction and generalization based on rough set theory,for a easier and higher accuracy tree,especially using the indicator that weighted average roughness to select testing attributes and to build decision tree.

A Study of correlation between first mover advantage and decision variable in Oligopoly;

The method has been applied to training a net with 13 decision variables and another net for modeling optimizing operation of FCC main fractionator with 108 decision variables.

Market research of real estate industry is briefly introduced,which contain environment variable and decision variable.