China Railway Express is developing rapidly, but the point-to-point direct organization mode has brought many problems to it. Therefore, this paper proposes to construct a hub-and-spoke network and adopt the “collecting and transportation” organization mode. In this paper, based on the single distribution p-hub median problem, a dual-objective planning model was constructed by considering the characteristics of CR Express in terms of cost and time. In addition, considering the port as a key node of international rail transport network, it plays a vital role for CR Express. Therefore, a hub-port allocation model was constructed to determine the hub-port allocation relationship. Furthermore, a Lagrangian relaxation heuristic algorithm was designed to solve the model built for CR Express transportation network. Finally, based on the constructed model, the actual operation data of CR Express were used in the designed example to verify the effectiveness and applicability of the models and methods.

中文翻译：

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中欧班列枢纽交通网络研究

中欧班列发展迅速，但点对点直连的组织模式也给它带来了很多问题。因此，本文提出构建枢纽辐射网络，采用“集运”组织模式。本文基于单分布p-hub中位数问题，结合中欧班列在成本和时间方面的特点，构建了双目标规划模型。此外，港口作为国际轨道交通网络的关键节点，对中欧班列发挥着至关重要的作用。因此，构建了一个hub-port分配模型来确定hub-port的分配关系。此外，设计了一种拉格朗日松弛启发式算法来求解为CR Express 运输网络建立的模型。最后，基于构建的模型，