本科毕业设计（论文）
外文翻译
Comprehensive Evaluation of the Economic Development Level of Guanzhong - Tianshui Economic Zone Using Principal Component Cluster Analysis
Author：Chunxiang Zhao ，Xinrong Yan，Xu Guo
Nationality ：China
Provenance：Asian Agricultural Research
Abstract: Based on 10 years of statistics concerning economic development in Xian as the main part of Guanzhong - Tianshui Economic Zone， this article builds the main indicator system to reflect economic development. Using two mathematical methods ( principal component analysis and cluster analysis) ，we carry out comprehensive evaluation analysis of the main economic indicators，point out the distribution differences in the economic development level in this region，and make classification，in order to provide a scientific basis for the decision - making body to lay down the relevant economic development strategies in accordance with the economic development level and geographical location.
Key words: Regional economy，Principal component analysis，Cluster analysis
In June 2009，the National Development and Reform Commission issued Guanzhong - Tianshui Economic Zone Development Plan， bringing a new development opportunity for Shaanxi and Gansu. Guanzhong - Tianshui Economic Zone includes Xian City，Tong- chuan City，Baoji City，Xianyang City，Weinan City，Shangluo City ( some districts and counties) and Yangling Demonstration Zone in Shaanxi Province，and the administrative regions under the jurisdiction of Tianshui City，Gansu Province，covering 80 000 square kilometers. At the end of 2010，the permanent population was 28.107 million. The directly involved regions include Hanzhong and Ankang in southern Shaanxi，Yanan and Yulin in northern Shaanxi，Pingliang，and Qingyang in Gansu.
Guanzhong - Tianshui Economic Zone，located in the center of the Eurasian Continental Bridge，at the strategic point connect- ing east and west，north and south，is the region with a good eco- nomic foundation，superior natural conditions，long human history and great development potential in Chinas western regions. Du Yueping[1] made a comprehensive and systematic analysis of de- velopment of Guanzhong - Tianshui Economic Zone，and he pro- posed that it was necessary to seize the opportunity，work hard， and make every effort to build Xian into an international metropo- lis. Yan Xinrong[2] discussed on how to change the mode of eco- nomic development. In this paper，using the principal component cluster analysis method，we carry out statistical analysis of the economic development level.
Regional economy is a comprehensive geographical concept of economic development，and also a comprehensive economic concept arising from the interaction between internal factors of economic development and external conditions in a certain area. It is restricted and influenced by the natural conditions，development and utilization of resources，socio-economic conditions，economic policies，and many other factors in the region. Regional economic development not only means the expansion of the size of the regions national economy，but also means the improvement of eco- nomic and social living standards. The regional economic effects are not merely reflected in the economic indicators，and there is a need to consider the overall social economic benefits and regional ecological benefits. Therefore，the study of economic development is of very important significance to the future development.
1 Data collection
Xian City administers 13 districts and counties，and the differ- ences in the resource endowments between regions lead to great disparities the economic development. In order to scientifically， objectively，accurately and reasonably measure the level of eco- nomic development of the district and county，according to the sta- tus of economic development in Xian City，this article selects sev- en key indicators that reflect the economic situation，and establi- shes the corresponding evaluation system.
The specific indicators are as follows: per capita GNP () ， the indicator reflecting the level of economic growth; per capita to- tal industrial output value () ; per capita total agricultural out- put value () ; per capita total tertiary industry output value () ; per capita revenue () ，the indicator reflecting the governments financial strength; total retail sales of social consum- er goods () ，the indicator reflecting the level of social purcha- sing power; fixed asset investment () ，the indicator reflecting the level of investment.
According to the total amount of economic indicators and population in the districts and counties of Xian City，we calculate the above indicators，as shown in Table 1.
2 Evaluation methods
Due to differences in resource endowments between the districts and counties，there are great differences in the economic develop- ment，and also in the rate of contribution to overall economic de- velopment of Xian. In order to objectively and comprehensively understand the specific circumstance of economic development in the districts and counties of Xian City to identify the degree of difference between them，this article will use both principal com- ponent analysis and cluster analysis.
Using the principal component analysis，the principal compo- nent scores are calculated，and the economic development of cities is reflected by the scores; using the cluster analysis to divide the 13 cities into several categories，the appropriate countermeasures are proposed according to their respective economic development level and geog
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