Research On Location Selection Of Transshipment Points Based On Urban Rail Transit

In recent years,with the rapid development of the economy and the society,the demand for urban distribution has significantly increased.However,the traditional distribution method mainly based on urban roads has been unable to meet the growing logistics needs of people because of the limitation of the road resource.In this context,the government has proposed the development of underground logistics and green logistics to improve the efficiency of urban distribution transportation and to promote the long-term stable and sustainable development of the logistics industry.Therefore,based on the existing research,an urban logistics distribution model using urban rail transit system which is proposed by the former researchers is improved.The thesis studies the location problem of urban distribution transshipment points based on urban rail transit system by means of systematic analysis,in order to provide reference for exploring new developmental pattern of logistics systems and solve urban distribution development problems.The main research contents of this paper are as follows.(1)Based on the analysis of the concept and characteristics of traditional urban distribution,a model of urban distribution using urban rail transit system is improved and analyzed by means of SWOT,and its feasibility is demonstrated in terms of transportation mode,time bucket and capacity.(2)Forecasting the overall demand of urban distribution market based on urban rail transit system,considering the factors of rapidity,economy,environment and convenience,calculating the sharing rate of urban rail transit system participation in urban distribution by combining with Logit model.(3)Based on the prediction of urban distribution demand of urban rail transit system,a model of transshipment points location selection based on urban rail transit system is established.Firstly,the indexes of degree centrality,betweenness centrality,closeness centrality and eigenvector centrality of each station in the region are calculated using complex network theory,combining entropy weight method and TOPSIS method to calculate the importance of urban rail transit stations,and the nodes with higher importance are selected as alternative transshipment points.Then,considering the cost of rail transportation and the cost of transportation through urban roads when the freight volume exceeds the capacity of urban rail lines,the location model of the transshipment points is established in order to minimize the cost and solved by means of genetic algorithm.(4)Finally,the feasibility of the location model are demonstrated by constructing and analyzing an example of W district of C city,and urban distribution transshipment points based on urban rail transit system are selected.