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The robustness of cargo ship transportation networks is essential to the stability of the world trade system. The current research mainly focuses on the coarse-grained, holistic cargo ship transportation network while ignoring the structural diversity of different sub-networks. In this paper, we evaluate the robustness of the global cargo ship transportation network based on the most recent Automatic Identification System(AIS) data available. First, we subdivide three typical cargo ship transportation networks(i.e., oil tanker, container ship and bulk carrier) from the original cargo ship transportation network. Then, we design statistical indices based on complex network theory and employ four attack strategies, including random attack and three intentional attacks(i.e., degree-based attack, betweenness-based attack and flux-based attack) to evaluate the robustness of the three typical cargo ship transportation networks. Finally, we compare the integrity of the remaining ports of the network when a small proportion of ports lose their function. The results show that 1) compared with the holistic cargo ship transportation network, the fine-grain-based cargo ship transportation networks can fully reflect the pattern and process of global cargo transportation; 2) different cargo ship networks behave heterogeneously in terms of their robustness, with the container network being the weakest and the bulk carrier network being the strongest; and 3) small-scale intentional attacks may have significant influence on the integrity of the container network but a minor impact on the bulk carrier and oil tanker transportation networks. These conclusions can help improve the decision support capabilities in maritime transportation planning and emergency response and facilitate the establishment of a more reliable maritime transportation system. 相似文献
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“海上丝绸之路”沿线重要港口区位优势度评估 总被引：1，自引：0，他引：1
评估“海上丝绸之路”沿线港口的区位优势度,对于港口及其腹地基础设施合理规划、港口未来投资预判以及推进“一带一路”倡议有重要意义。本文从海陆联运的视角出发,综合考虑港口腹地的路网密度、交通干线影响度、城市影响度、航运战略枢纽影响度和航运战略通道影响度等五个因素,构建港口区位优势度评价模型来对“海上丝绸之路”沿线重要港口进行区位优势度分析。研究发现：① “海上丝绸之路”沿线港口的区位优势度区域化差异显著,从东向西总体呈“高-低-高”的空间分布格局;② 从世界分区的视角看,东南亚区域港口区位优势最高,其次为南欧至西欧、南亚、北非、西亚等地区,东非至南非区域港口区位优势度最低;③ 港口各区位影响因素的评价结果空间分布特征差异显著,其中港口区位优势度分布特征与交通干线影响度、城市影响度的相关性较大。研究结果可为海外港口基础设施的投资建设过程提供科学支撑。 相似文献
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