Study On The Characteristics And EvolutionTheory Of Urban Logistics Spatial Structure

With the development of globalization of economy and world trade liberalization, urban becomes centre of the world economy. Logistics is becoming more and more important to motivate the progress of urban. Making a scientific and rational urban logistics planning could enhance and improve the quality and operational environment of urban economy. And it is significant for urban economy to develop healthily and sustainably. The spatial structure theory of urban logistics is an important basic theory for making urban logistics planning. There are new tendencies of Chinese urban logistics spatial structure caused by the globalization of economy and economic transformation. Studying the characteristics and regularities of urban logistics spatial structure is theoretically and realistically significant to configure logistics resources rationally, to develop city logistics space wholly, and to identify and cultivate the urban logistics poles.In this dissertation the author studies the characteristics and regularities of urban logistics spatial structure, which contains the forming mechanism and characteristics of both external-Urban and internal-Urban logistics spatial structure. The content of this dissertation lies as follows.(1) The forming mechanism of external-Urban logistics spatial structure.Study the forming mechanism of external-Urban logistics spatial structure in three aspects:the regional characteristics of logistics demand, the regional characteristics of logistics supply, and the interaction between cities. The difference in natural conditions and productivity level among cities is a basic reason of producing external-urban logistics. Production network, circulation network and their regional characteristics is demand base of forming external-urban logistics spatial structure. The circulation of logistics elements and the spatial organization of logistics enterprise are supply base of forming external-urban logistics spatial structure. The behavior characteristics of logistics enterprises are the microscopic mechanism of urban logistics spatial structure. The types and sizes of logistics enterprises determine the radiation space range of external-urban logistics and the breadth and strength of their relation.(2) The network characteristics of external-Urban logistics spatial structure.There are characteristics of external-Urban logistics spatial structure. Based on analysis of external-Urban logistics spatial structure elements, determine the indicator system of external-Urban logistics spatial structure according to urban's overall structure and node structure. Using social network and complex network methods, build an overall analysis model of external-Urban logistics network from the distribution features, clustering features, connecting mechanism and condensing features. Build a node central characteristics analysis model of external-Urban logistics network. Build a cumulative rate and allocation rate model to determine the spatial effect scope of nodes. Make an empirical analysis of external-Urban logistics spatial structure based on data of Chinese grade A logistics enterprises.(3) The characteristics of internal-Urban logistics spatial structure.Define the connotation of internal-urban logistics spatial structure. Study the dot, line, face and their relationship of internal-urban logistics spatial structure intensively. Demonstrate the morphology of internal-urban logistics channel and logistics gathering area, especially the logistics gathering area near port and airport. Provide theory basis for internal-urban logistics planning and growth pole determining.(4) The evolution mechanism of the internal-Urban logistics spatial structurePropose a new non-equilibrium statistical mechanics framework to analyze the interactions among space subsystems and their environment, and elaborate the self-organizing formation process of the internal-urban logistics spatial structure. Reveal the mechanism of producing a macroscopic urban logistics spatial structure pattern from the microscopic space subsystems interaction. Describes the spatial evolution of urban logistics fractal mechanism and use the maximum flow principle to study the growth characteristics of the Beijing logistics space structure.(5) The forming mechanism of internal-urban logistics functional area spatial distributionAnalysis the evolution characteristics of internal-urban logistics functional area spatial distribution from the evolution basis, evolution essence, evolution form and evolution stages four aspects of urban spatial structure evolution. Put forward a statistical analysis method to study internal-urban functional area spatial distribution evolution. Construct global and local autocorrelation models of internal-urban functional area spatial distribution. Measure the evolution characteristics of internal-urban logistics functional area spatial distribution. Make an empirical analysis with Beijing urban logistics functional area spatial distribution.