Application of knowledge roughnessbased multivariate decision tree in transformer fault diagnosis system;

A knowledge roughness based approach to multivariate decision tree construction;

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.

Research on Knowledge Roughness Based on Rough Sets;

Proposed the concept of granule amount of knowledge,granule seed and granularity,proved its dull relation between knowledge roughness and its correspondent granularity in rough set theory,declared that knowledge roughness is closely related to granule amount of knowledge,granule seed of knowledge and granularity of knowledge.

Relationship between roughness of knowledge and conditional information entropy

In rough set theory, the concept of roughness of knowledge is defined by equivalence relation and set inclusion.

Prediction of inconsistent air qualification systems based on rough entropy;

Rectification of rough entropy in rough-fuzzy sets;

Information quantity and rough entropy in ordered information systems based on dominance relations;

The factors leading to uncertainty in rough sets were analyzed;the existing roughness and rough entropy methods for measuring uncertainty were compared;a modified rough entropy method was presented,and the properties of the rough entropy were proved.