Study on Spatial Structur e of Urumqi Metropolitan Area Based on Economic Relation Intensity
基于经济联系强度的乌鲁木齐都市圈 空间结构研究

Based on fractal theory,spatial structure of Urumqi Metropolitan Area is studied;and the economic relation intensities amongst different cities and counties are calculated.In comparison with self-affine fractal characteristics,the spatial distributions of economic relation intensity are analyzed.It is pointed out that the radiation of central city is weak.Combined with degree of industries' similarity,measures of optimization are discussed.It shows that Urumqi,Miquan and Changji are melt into one economic region,and fractal dimension of economic relation intensity is nearly as twice as that of centre in Urumqi.The spatial structure of Metropolitan Area can be further optimized.Based on analysis of optimized plan,two characteristics are found: first of all,economic radiating power and the acceptability of cities around the core region present the law of decaying according to the exponential function with increase of distance.Secondly,gradient diffusion depends on city's rank and scale.Economic diffusion may bypass the cities whose ranks are low and reach the cities that from the core region but with higher ranks are farther.During the course of economic diffusion,two characteristics co-exist,and the former law is more manifest.