The Research On Express Transportation Network Layout And Evaluation

With the accelerating development of the global network of economization, adapting to the small batch, batches, quickly delivery and high quality service, the express is gradually developing stronger in the global market economy competition. The express company competition ability more embodies in its transportation network layout, efficient transportation network layout, not only can improve the velocity of the goods, but can increase the customer service area coverage, so that more conducive to the sustainable development of the enterprise. Therefore, the study of express enterprise network node layout problem has important theoretical value and practical significance.This article to express transportation network layout and evaluation as the research object, on the basis of the analysis of research status at home and abroad, reviews the related theories of the express transportation network layout and evaluation, and based on the characteristics and principle and layout influence factors of the express transportation network layout, mainly discusses the express axial radial transport layout method, combining the theory of location-routing problem (LRP) to establish mathematical model of the express transportation network node layout, and uses the genetic algorithm to solve the model, in order to improve the precision and efficiency of the model solving; At the same time, to test and verify the scientific and rationality of the layout method, based on the analysis of evaluation factors, comprehensive evaluation index system is established, and then combined with the fuzzy comprehensive evaluation method based on group decision on its evaluation; Finally, through an example analysis, to verify that the express transportation network layout scientific, the feasibility and validity of the mathematical model and rationality of the evaluate and so on.The purpose of this thesis aims to research the basic theory and method of express transportation network layout, to provide theory support with a better operability in the express network layout optimization practice of the modern express transportation enterprise,at the same time can also be used for other express enterprises in the related network layout research and practice, provides reference and theoretical guidance...