Abstract

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Title:: Agglomeration and dispersion evolution model for spatial structure of urban logistics network

Author(s):: FU Jiang-yue; ZHANG Jin; CHEN Yi-heng; CHEN Gang; (1. School of Transportation and Logistics, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. School of Management, Guizhou University, Guiyang 550025, Guizhou, China)

Keywords:: traffic engineering; urban logistics spatial pattern; evolution mechanism; agglomeration economy; agglomeration and dispersion; weighted network; BA model; cost preference

Abstract:: Taking spatial structure of urban logistics network as research object, to investigate its agglomeration and dispersion evolution, an extended and weighted BA model was established based on complex network method. The evolution model was driven by economic mechanism and established to minimize the total cost of urban logistics network. The proposed model also took dynamic change of network scale and spatial distance into consideration. Evolutionary algorithm was designed and MATLAB was used to conduct numerical simulation and analysis. The results show that agglomeration economy is the driving force of agglomeration evolution of urban logistics spatial pattern. While agglomeration diseconomy is the driving power for the dispersion (or deconcentration, sprawl) and balance of urban logistics spatial pattern. Effect of agglomeration economy is more obvious in the evolving process, and the logistics nodes can reflect the polarization-sprawl evolution characteristics better than the logistics channels. The constructed model can simulate and analyze the agglomeration and dispersion evolution process and characteristics of urban logistics spatial network structure and to uncover mechanism of economic motive power.