基于预期流优化的集装箱班轮网络引力模型

Gravity Model on Container Liner Network Based on Expected Volume Optimization

为探究集装箱班轮网络形成机理,首先分析集装箱班轮特点,发现节点间预期流是影响航线开设的关键因素;其次改进经典引力模型,对节点间预期流进行预测,按预期流由大到小顺序连边,构建集装箱班轮网络引力模型;最后对东亚区域班轮网络进行实证研究,计算港口节点适应度,构建仿真网络并分析其拓扑特性演化情况。演化结果表明,随着连边的加入,仿真网络的连通性增强,各项拓扑特性都不断趋近于实际网络。由此,模型的有效性得到验证。

To probe into the construction mechanism of container liner network, its characteristics is analyzed to find that the expected volume between nodes is a key factor which determines the construction of liner route. The gravity model for container liner network is constructed by con- necting the node pair in expected volume order. Then an empirical study on the East Asian con- tainer liner network is made in which the port fitness index is calculated to construct a simulative network. The evolution result demonstrates that the connectivity is enhancing and the major to- pological characteristics in simulative network are approaching those in physical network along with adding of lines. Thus, the model is validated and can be applied in container shipping prac- tice.