基于主成分和GIS 的关天经济区区域经济空间分异研究

在关中-天水经济区＂一核、一轴、三辐射＂的空间发展战略基础上,对经济区县域生产要素禀赋和生产技术水平等基本特征进行综合评价,据此划分区域并进行各区产业功能定位,以期为促进产业整合与升级和优化区域经济结构提供科学依据。运用多元统计的主成分分析,对研究区65个区（县）经济发展状况进行综合评价;运用区域分工指数和区位商衡量各县之间的产业集聚趋势,采用层次聚类法和GIS空间分析将经济区划分为5个区域;最后提出促进经济区地区分工及一体化,统筹区域经济发展的对策建议。

Spatial Variability of Regional Economies in Guanzhong-Tianshui Economic Region Based on Principal Components Analysis and GIS

On the basis of such spatial development strategy as ＇ one core, one axis, and three economic zones＇, the author provided scientific evidence for both acceleration upgrade of industrial structure and optimization of economic structure by building up comprehensive development index of production factors and technical level for county economy and dividing Guanzhong-Tianshui economic region into different comprehensive zones. Comprehensive evaluation of regional economy taking counties as units in the study area was made by principal components analysis; tendency of industrial agglomeration was calculated by Krugman regional specialization index and location quotient; while the economic region was delimitated into five zones according to hierarchical clustering and GIS spatial analysis. Finally some suggestions were put forward on how to promote regional specialization and integration, and to coordinate regional development in the five zones divided.