Abstract:

As the China-Vietnam express functions regularly, the options of logistic channels between inland cities in Southwest China and Southeast Asia are increasing. Stable logistic services provided by freight companies are conducive to the smooth implementation of production plans of manufacturing companies. Herein, the goal is to make a more scientific and reasonable choice by comparing existing logistic channel schemes. To achieve this, we consider minimizing the freight time and cost as the optimization objective, include the soft time window requirement for the total time of the liner (ship) departure and order in international transportation, construct a mixed multi-objective integer programming model, select high value-added cargos as the research object, solve the selection scheme of import channels. Moreover, we choose Chongqing natural rubber import route as a case, achieve the shortest route for the transportation of goods based on the improved Dijkstra's algorithm, determine the total time and cost associated with each scenario. Our calculation results show that the findings obtained using the proposed model can provide a reference for freight enterprises for decision-making on international logistic channels in inland cities of Southwest China, thus providing scientific suggestions for the construction of new land and sea channels in the west.

Key words: logistic channel selection, mixed integer programming, multi-objective, soft time windows, new land and sea channel