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为揭示海运航线网络的特征,评估港口失效对网络连通性的影响,基于复杂网络的相关理论,对海运航线网络的结构特征进行分析,并考察了港口在不同失效模式下网络连通性的变化.研究结果表明,海运航线网络同时具有较小的平均路径长度和较大的集聚系数,具有小世界效应,度分布与幂指数分布拟合程度较好而具有无标度特征;在节点随机失效下网络的抗毁性较强,而在选择失效下,网络的连通性较差;少数枢纽港口对海运航线网络的连通性起着关键的作用,应当切实保障这类港口的正常、高效运行,同时需加强枢纽港口与普通港口之间的连接,完善网络结构.
In order to reveal the characteristics of ocean route network and evaluate the influence of port failure on network connectivity, structural characteristics of ocean route network are analyzed based on the theory of complex network. The change of network connectivity under different failure modes is also investigated. The results show that the maritime route network has a smaller average path length and a larger clustering coefficient with small-world effect, and the degree distribution and power-exponential distribution fit well and have scale-free features. When the node is randomly stalled, The network is more invulnerable, while under the failure of choice, the connectivity of the network is poor; the port of a few hubs plays a key role in the connectivity of the maritime route network and should ensure the normal and efficient operation of such port while It is necessary to strengthen the connection between the hub port and the ordinary port and improve the network structure.