Research On The Spatial Structure Characteristics Of Regional Logistics In Zhongyuan Urban Agglomeration

With the promotion of the "One Belt and One Road" strategy and the "Internet + circulation" action plan,the logistics demand in China has increased rapidly and the logistics development has ushered in new opportunities.In the process,many places have accelerated the construction of logistics facilities such as logistics parks and distribution centers.However,due to the lack of unified planning,the unreasonable spatial layout of regional logistics is more prominent.Spatial structure of regional logistics is an important reference for the spatial layout of regional logistics,thus it becomes the focus of academic research in the new period.Domestic related literature is focused on provincial-level or prefectural-level administration while the study of cross-administrative region is less.The study area is concentrated on the coastal border area where logistics development level is higher,and relatively lack of the research into the Midwest.As the core component of the rise of central China,the logistics development of Zhongyuan urban agglomeration is representative and has prominent position advantage.In recent year,economic advancement has provided important support for the development of logistic.Therefore,it is of certain theoretical and practical value to explore the spatial characteristics of regional logistics in Zhongyuan urban agglomeration.The spatial structure characteristics of regional logistics are analyzed hierarchically by “point,line and network” in Zhongyuan urban agglomeration.Firstly,by using the rank-size rule,this paper analyzes the distribution and combination state of logistics scale of city nodes from 2005 to 2015.Secondly,by using the logistics gravity model and constructing the index system of urban logistics quality index and determining the “distance” index,this paper measures the strength of logistics connection between citynodes in 2005,2010 and 2015,reflecting the axis contact feature;Thirdly,social network analysis is used to analyze the advantages and disadvantages of city nodes in the overall network,revealing network structure characteristics.Finally,the influence factors of the spatial structure characteristics of regional logistics are analyzed.On this basis,some policy suggestions to the optimization of the spatial layout of the regional logistics are put forward.The main conclusions of the study are as follows:First,the rank-size distribution of regional logistics in Zhongyuan urban agglomeration is logarithmic normal distribution from 2005 to 2015,with a large number of city nodes in the middle sequence,and the first urban monopoly is relatively weak.In the study period,the spatial distribution of the logistics scale of city nodes shows relative equilibrium-non-equilibrium evolution characteristics,and the power of concentration is greater than the power of dispersion.Second,regional logistics links are constantly strengthened and the high-level logistics contact axes are gradually increased in Zhongyuan urban agglomeration,showing the characteristics of central city orientation and neighboring city orientation.The spatial distribution of regional logistics has significant characteristics of core-periphery structure and layer structure.The city of Zhengzhou has been in the position of the core city to generate a full range of radiation and effect,but the impact on the cities in the central region is far higher than that of the border cities of Zhongyuan urban agglomeration.In terms of the logistics relation intensity,the cities around Jingguang-Longhai lines are better than the other lines,while the logistics links between city nodes along Jingguang line are more closely related than cities along Longhai line.In addition,the spatial difference of the total volume of logistics external contact has been greatly expanded,the high value area is mainly distributed in the central and northern regions,and the low-value area is mainly concentrated in the eastern and southern regions.Third,it has been found that the density of the whole logistic network is increased and the networkstructure is denser and complicated,but it is still at a low level.Degree centrality shows the trend of polarization,and the regional logistics network is affected by a few core nodes.The difference of the betweenness centrality rises.The network is increasingly dependent on the core city of Zhengzhou,which lacks of a reasonable gradient central cities as the growth pole of regional logistics;The cohesive city subgroups of the regional logistics network have distinctive characteristics,which form four fairly stable subgroups including east,south,west,north in four different directions,and which have a trend of evolution along the hierarchy network system.Fourth,for the distribution pattern of city node logistics scale,industry structure and urban scale has been the important influence factors.With the development of logistics shifting from the market supply orientation to the market demand orientation,the influence of the consumption level is increasingly important.For the pattern of regional logistics network,regional development strategy is based on the premise of its formation.Traffic location factor is the significant support of its formation.Space effect and logistics enterprises also have a profound impact on its formation.For the suggestion of logistics spatial layout optimization,three aspects should be paid more attention to.The first is the optimization of logistics nodes,according to axial-spoke network theory,dividing axis city and radial point city and clearing the function of each city node;The second is the optimization of logistics lines.In the future,it is necessary to further accelerate the construction of air freight corridors and improve the density and speed of logistics channels.The third is the optimization of the logistics circle,five unique logistics circles can be built to realize complementary advantages and the maximum of linkage.