This paper attempted to create a comprehensive index system indicating these cities\' sustainable development from the respective of economy, society, and environment, and then measured capacity of the twenty-four cities involved by applying the approach combing grey fixed weight cluster and grade characteristic value.

In the paper,a kind of general process based on grey fixed weight clustering and triangle whitenization weight function is put forward to assess the mobility of armored vehicle.

The weight is given before clustering process in traditional grey fixed weight clustering decision,while it is not an objective method.

And then a kind of grey cluster assessment method for surface-air missile weapon system is presented,which is based on grey fixed weight clustering and triangle whitenization weight function.

In order to explore the theory basis of flue-cured tobacco grade substitute and grouping process,the test clustered 68 chemical component samples of 18 fluecured tobacco-growing areas by grey equal weight cluster method.

Ecological environment quality comprehensive evaluation model based on grey clustering;

The Application of Grey Clustering in Submerged Layer Logging Interpretation;

Application of grey clustering method for water environmental quality assessment in Fuyang River;

Optimal design of main transmission system of machine tool based on the grey classification;

Optimal Design of Driller' Gear Box Based on the Method of Grey Classification;

Then,the main transmission system of machine tool is regarded as grey system,several reasonable schemes mentioned above can be put in order according to satisfaction with grey classification,which is concluded in grey system theory.