The Research On Layout Method Of Urban Intelligent Underground Logistics System

With the development of economy,the traffic congestion in the city is becoming more and more serious,and the development of e-commerce has led to the rapid growth of logistics distribution and frequency.The restriction of urban road capacity and logistics system transport capacity make the contradiction between supply and demand highlights.In this context,the urban underground logistics system studied in this thesis has become a new way to solve the problem,to transport freight transport to the underground way to solve the urban traffic problems.Putting focus on the research of layout of urban underground logistics system is to complete the key steps of the research process of urban underground logistics system development.Based on the analysis of the operation and organization characteristics of urban intelligent underground logistics system,the layout method of urban intelligent underground logistics network around the laying of pipelines is studied in this thesis,where the layout model and algorithm is established.First of all,the domestic and foreign research results of underground logistics system is systematically analyzes.The existing layout method of underground logistics system,its realization condition and feasibility are summarized in thesis.On the basis of the analysis of the characteristics of the system,it gives a feasible layout ideas of the urban underground logistics system.Secondly,according to the characteristics of the underground logistics system net,work,a bi-level programming model is constructed as the layout model of urban underground logistics system.The connection between the pipe network and the transport path is optimized by the two models from the perspective of the whole and the part,so as to achieve the cost of construction and transportation costs weighted the total cost of the smallest target.Thirdly,according to the characteristics of the model,the algorithm combining the genetic algorithm and the shortest path algorithm is designed to solve the two models.Finally,an example is given to validate the model and algorithm,which proves that the model and the algorithm are reasonable and feasible.The theory of layout method in this thesis has some reference value in the research of urban intelligent underground logistics system theory,which can provide theoretical support for the construction of urban intelligent underground logistics system in the future.This method is an important step to fill the convergence process of the research process of the development of the urban underground logistics system,which is of great significance for the future logistics system network layout.