Marinetime Network And Its Robustness Analysis Based On Multilayer Complex Networks

The Global Ocean Transportation System is a complex system composed of a port system,a route system,and a management system.In recent years,with the rise of complex network theory,research on complex networks has provided a large number of theoretical foundations for the structural characteristics,robustness,and evolution characteristics of marine transportation systems.In this context,this article does the following work:Firstly,this paper proposes the "Maritime Network Ontology" model.Based on the ABC ontology model,the concepts and relationships in the real world and the complex cyberspace are combined and their characteristic operators are defined by defining the classes and relationships in the ontology model.Secondly,this paper conducts an empirical analysis of the global maritime network and calculates its basic statistical indicators,including route distribution,average number of transfers,transportation density,transfer capacity,transportation potential,and transportation accessibility.Verify that it meets the small-world effects and scale-free characteristics of complex networks.At the same time,comparing with other transportation networks,it can be found that the entire maritime network has a clear ?core-edge? structure.Finally,this paper analyzes the robustness of the global maritime network and finds that when the maritime network is subjected to a random attack,the size of its largest connected subgraph decreases more slowly than the network efficiency,and at the same time,when the key nodes in the network are affected During the attack,the network as a whole can still maintain high network connectivity,but the network efficiency will be declining.The maritime transport network as a whole exhibits a strong robustness against random attacks and selective attacks.This paper constructs a multi-layer heterogeneous maritime shipping complex network framework and proposes a maritime network feature analysis operator.The shipping network was constructed through ship date data,statistical indicators of the network were analyzed,the robustness of the maritime network was explored,and the impact on the network when subjected to different attacks was evaluated,and the combination and application of the complex network theory and the real marine transportation system are realized.