ANALYZING REGIONAL ECONOMIC DISPARITIES BASED ON ESDA
利用兰新铁路辐射带82个县的经济数据，通过空间分析揭示县域经济强度呈金字塔分布，存在空间集聚和东南-西北方向的U型差异，识别出热点区与盲点区。
Based on the eighty-two counties data of relative economic indexes,which lie along Lan-Xin Railway belt radiated within 100 km radius,this paper calculates the general scores of counties economic strength,and then analyzes the spatial differences of county economic strength in Lan-Xin Railway Radiation Belt by means of spatial analysis provided by ARCGIS 9.2 and GeoDA.The result that the economic strength of fifty-six counties is smaller than the average level,shows that weaker counties takes bigger portion,and it is spatial concentrated for those similar units;Accord to the general scores of counties economic strength,the counties in Lan-Xin Railway Radiation Belt can be divided into five types: the economic developed area,the comparatively developed area,the medium area,the undeveloped area and under-development area;From the number of county administrative units,the rank of county economy basically presents pyramid;The economic development exists unbalance phenomenon;The economic strength significantly presents U in southeast to northwest,it shows decreasing trend from the southwest to northeast,east to west and north to south direction,but the trend is not significant;Lanzhou city and Urumqi city lie in the hot zone,blind spot area mainly distributes in the southeast part of the Lan-Xin Railway Radiation Belt.Finally,this paper analyzes the reasons of regional difference in geographical conditions,location factors,development strategies,and regional interactions.