Study on the high quality operation plan of China Railway Express
In order to meet the target requirements of high-quality development of China Railway Express and prioritize the release of capacity to high-quality cargo,this paper studied the method of optimizing the operation scheme of China Railway Express based on the contribution of categorized cargo to the operation quality of the Liner.Firstly,cargo was classified according to its value,the origin and timeliness of the train operation platform.The cargo transportation efficiency coefficient was set to calculate the comprehensive cargo transportation efficiency of different categories of cargo including economic and social benefits,which was used to reflect the influence of cargo transportation characteristics on the train operation quality.Secondly,according to the current situation of the route,alternative cities were selected as consolidation centers.An"axle-spoke"model for the operation of the China Railway Express was designed.A time-space network was constructed by adding the time factor.Then,with the objective of optimizing the comprehensive transport efficiency of the operation of the liner,an operation scheme optimization model was established based on the capacity constraints such as cargo flow balance,train connection,grouping restrictions,consolidation and transshipment operations and port operation restrictions.Combining the characteristics of the model,the column generation algorithm for solving the optimization model was further designed,and the restricted master problem and the original integer planning problem were solved using Gurobi software.The calculation results show that the"direct + transit"model based on a"spoke"network can increase the traffic demand satisfaction rate by 3.56%.The optimized scheme achieves priority transportation of better-operated trains and high-value time-sensitive cargoes with limited capacity at the port,and allows them to arrive at the port in a balanced manner,relieving congestion at the port.The study can provide support for the development of the daily transportation plan of the China Railway Expressto meet the requirements of high-quality development of China Railway Express and prioritize the release of freight capacity to high-quality goods.This paper studies the optimization method of the operation scheme of China Railway Express based on"hub-and-spoke"network.
China Railway Expresstime-space networktime costhigh-quality transportation
万方数据
维普
