By applying the gray correlation analysis theory, the developed method can deal with the evaluation indices with the various weights and evaluate the gray correlation degree between an individual alternative scheme a.

Aiming at practical character of ventilation system in uranium mine well,through deciding the evaluation index system,a grey comprehensive evaluation model for rationality of ventilation system in uranium mine well is established based on grey correlation theory.

The grey relation theory is used to analyze quantitatively the relationship between the changes of industrial structure and the growth of GDP in Anhui Province after China s reform and opening up to outside world.

Lastly,manufacturing resource selection strategy and implementation algorithm were put forward by using both Analytic Hierarchy Process(AHP) and grey relation theory.

Combining grey-relational theory and Euclidean distance, a new method for computing degree of similarity in case-based reasoning (CBR) was presented.

The method of estimating public works cost based on grey related theory;

In order to choose to offer the economy,practical equipments in numerous equipments,propose asking the method of solving in selecting type of equipment based on grey related theory.

This paper,based on grey related theory,studies the peasants income in central region Hainan and proposes some solutions to the problem.