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为深入分析全国及各区域原油管网的结构与布局,揭示其空间结构特征,论文运用分形理论的三种维数:加权长度-半径维数、分枝-半径维数和关联维数,分别从密度、连通性及通达性研究了全国及各区域原油管网。研究结果表明:全国原油管网的密度和连通性均存在明显的东西分异特征,密度自东向西呈“线状-散点”的下降形态,连通性自东向西呈“散点-线状”的升高形态,而通达性则普遍较低;对各区域来说,东北、华北和华东等东部管网除连通性较低外,其他分形指标相对较高;西北管网的密度、通达性均不如东部,而且其新疆管网的连通性数值超过2,是不正常的连通结构;华南管网的多数分形指标均低于其他地区,其管网结构雏形尚未形成。
In order to further analyze the structure and layout of crude oil pipelines in China and other regions and to reveal their spatial structure characteristics, the paper uses three dimensions of fractal theory: weighted length - radius dimension, branch - radius dimension and correlation dimension, respectively The national and regional crude oil pipelines were studied from the aspects of density, connectivity and accessibility. The results show that the density and connectivity of national crude oil pipelines all have obvious differentiation features. The density shows a “linear - scattered” decline pattern from east to west, For each region, except for the low connectivity in Northeast, North China and East China, the other fractal indices are relatively high; the northwest The density and accessibility of the pipe network are not as good as the east, and the connectivity value of the pipe network in Xinjiang exceeds 2, which is an abnormal connectivity structure. Most of the fractal indexes of the pipe network in South China are lower than other regions, and the rudiment of the pipe network structure has not yet formed .