中原城市群铁路网络可达性及经济联系格局

Railway Network Accessibility and Urban Economic Linkages in Central Plains city group

选取城市间最短旅行时间数据和社会经济综合指标,采用加权平均旅行时间、修正后的引力模型、地统计分析、空间探索性分析和空间计量模型等方法,对中原城市群可达性与经济联系格局进行分析。结果表明:(1)中原城市群可达性水平整体呈现"十"字型空间格局,南北向沿线城市的可达性优于东西向;局部空间上,高低值空间集聚分块状特征明显,显著空间关联类型以显著HH区和显著LL区为主。(2)经济联系整体呈现"钻石"型立体网络格局且分层态势明显;局部空间上凸显以郑州、商丘、洛阳等核心区城市为中心的辐射状格局;网络结构呈小团体集聚特征,团体内部联系密切,整体联系相对松散。(3)经济联系强度受到城市规模、城镇化水平、交通、区位及资源流通能力等因素的共同影响。

Based on the data of the minimum travel time between every two provincial cities and the comprehensive index of socioal economy,we used weighted average travel time indicators,modified gravitational model,geostatistical analysis,spatial exploratory analysis and spatial econometric model to explore the urban accessibility and spatial connections of Central Plains city group. Results are shown as follows： First,the spatial pattern of the regional accessibility forms a cross axis shape like ‘十＇,the accessibility of cities along the northsouth direction is superior to that of east-west cities. Locally,The statistical of Moran＇s I shows the characteristic of spatial clustering,and the significant spatial association types are dominated by significant HH and significant LL. Secondly,economic linkages present a three-dimensional network shape like a diamond,which structure not only has an obvious hierarchy feature,but also be characterized by gathering small groups,close ties within the group,as a whole is relatively loose links. The local space pattern highlights the radiated characteristics of central cities such as Zhengzhou,Shangqiu and Luoyang. Thirdly,the urban size,urbanization level,transportation condition,urban location and resource circulation capacity would account for the intensity of economic connections and spatial relationship in Central Plains city group.