To improve the precision of vehicle gear box fault diagnosis based on gray cognate method and reduce the inconsistency of decision, gray cognate analysis is combined with rough set theory to find the optimization eigenvector.

Application of grey relation analysis to reservoir evaluation-taking Bei 2 area, Saertu oilfield, Daqing as an ex- ample;

Fuzzy synthetic evaluation and grey relation analysis of economic strength of main city in China;

Grey Relation Analysis of the Relationship between Agricultural Production Structure and Farmers Income in Anhui Province;

Performance evaluation of complicated product based on grey relational analysis;

Optimization and selection of air-conditioning heat andcold sources based on grey relational analysis;

Application of grey relational analysis to judging the type of fault-phase in transmission line;

Gas logging interpretation method of oil-gas potential reservoirs based on grey correlation analysis;

The grey predicting and grey correlation analysis of city road traffic noise pollution;

Design scheme evaluation of an attacking system based on grey correlation analysis;

Assessment of urban ecological security based on entropy-weighted gray correlation analysis;

Application of gray correlation analysis on regional agriculture leadingindustry adjustment strategy of Guyuan county in Bashang Plateau;

Several Decision-making Methods Based on Gray Correlation Analysis and Their Applications;

Application of grey incidence analysis in the study of relationship between composition of tobacco leaves and smoke components;

Study on Application of Restrictive Factors And Grey Incidence Analysis on Winter-wheat Growing;

Grey Incidence Analysis of Saline -Alkali in Songnen Plain Due to Stress of Human Activities;