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Scale-free structure of town road network in southern Jiangsu Province of China

机译：苏南城镇道路网络的无尺度结构

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摘要

From the viewpoint of Graph Theory this paper builds a town road network graph of regional scale, and proposes numerical vertex degree (D i ), rank vertex degree (D r ) and population size vertex degree (D p ) on the base of vertex degree (D). Then the indicators of D i , D r , D p and mathematical statistics methods are applied to investigating scale-free structure of town road networks in the southern Jiangsu Province. The results show that the distribution of D i does not exhibit scale-free properties, but D r and D p do. Additionally the correlation coefficient between D p and D i is only 0.569, but the spatial correlation between D p and D r is very evident on the base of correlation analysis and spatial analysis of GIS. The mutual mechanism between D p and D r spatially represents a “Core-Belt” model of town development of regional scale. The town development model is open and clustered, and beneficial to both economic development and ecological protection. And then we suggest that Suzhou City, Wuxi City, Changzhou City and Wujin City control towns’ high-density pattern by conducting centralization and consolidation policies, and properly controlling and planning higher rank roads; whereas Nanjing City, Zhenjiang City, Jintan City and Liyang City must strengthen the development of towns along higher rank roads.
机译：本文从图论的角度构建了一个区域规模的城镇道路网图，并提出了数值顶点度（D i ），等级顶点度（D r ）和人口规模顶点度（D）。 p ）基于顶点度（D）。然后采用D i ，D r ，D p 指标和数理统计方法，对苏南城镇道路网的无标度结构进行调查。结果表明，D i 的分布不具有无标度特性，而D r 和D p 却没有。此外，D p 与D i 之间的相关系数仅为0.569，但基于相关分析和分析，D p 与D r 之间的空间相关性非常明显。 GIS的空间分析。 D p 和D r 之间的相互作用机制在空间上代表了区域规模城镇发展的“核心带”模型。城镇发展模式是开放的，集群的，有利于经济发展和生态保护。然后我们建议苏州市，无锡市，常州市和武进市通过实行集权和整顿政策，适当控制和规划高等级道路来控制城镇的高密度模式。南京市，镇江市，金坛市和Li阳市必须加强高等级公路沿线城镇的发展。

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