From the first overall plan of the city comprehensive economic strength,we can see the recent changes and the rapid city eco- nomic development but the development speed lowers year by year.

Based on economic theory and the method of fuzzy synthetic evaluation,evaluation index system in comprehensive economic strength is constructed and the comprehensive economic strength of 15 main city in China is compared.

By the means of Clustering analysis,Appraisal into comprehensive economic strength counties in Chongqing is discussed.

According to the actual situation in the Tibetan Regions in China,the competitiveness of economic synthesis strength in seventeen Tibetan Regions are compared and surveyed,and then is compared it with some other minority nationality regions in China.

In this paper, by using the relevant data of Zhejiang Province in 2005, we introduce the Weighted Mean Method, Principal Component Analysis, Factor Analysis and Clustering Analysis to evaluate and rank the synthetic economic power of the 11 main cities of Zhejiang Province.

In this paper, the author extracts 8 economic variables by factor analyzing, gets the result of the orders using the first principal component as the measure of the counties synthetic economic power and classifies the result primarily.

The evaluation of the city s economic power in the boroughs of Zhejiang Province;

In this article,we evaluate the city s economic power of the delta of pearl river using main-factor and cluster analysis.