亚洲区域海运网络的结构特性与演化模型

Structural characteristics and evolution model of Intra-Asia shipping network

为深入刻画海运网络的结构特性与演化机制,利用亚洲区域前十大班轮公司的航线、船期及运力数据,构建亚洲区域加权海运网络模型,根据相关指标分析其拓扑结构和权重结构的特性,利用加权BBV模型模拟网络的演化情况.研究结果表明,网络拓扑结构具有较小的平均路径长度和较大的聚类系数,度分布服从正态分布,属于小世界网络;网络权重结构具有较小的聚类系数和较小的平均路径长度,点强度和边权分别服从幂律分布和长尾分布,属于无标度网络.利用BBV模型拟合的仿真网络,与实际海运网络基本一致,说明BBV模型可反映实际网络的演化机制.

To investigate the structural characteristics and evo- lution mechanism of shipping network, the weighted Asia shipping network was constructed. The topological and weigh- ted structure were analyzed based on relative index, and BBV model was used to simulate the evolution of shipping network. It is shown that in the topological network the average path length is smaller, and the clustering coefficient is larger, the node degree appear normal distribution. Therefore, the topoi- ogical structure is a small-world network. For the weighted network, the clustering coefficient and average path length are smaller, the node strength and edge weight appear respective-ly power-law and long-tail distribution, therefore, classified as scale-free network. Furthermore, the simulation network based on BBV is similar to the shipping network, thus BBV model can simulate the evolution of shipping network.