基于复杂网络的世界航运中心网络结构与特征

航运中心城市是航运业集聚的空间载体。由于全球化和国际贸易的影响,航运产业链的不同价值部分在一定空间范围分布,考虑产业空间位置的产业链打破了传统的简单线性关系,形成复杂的网络关系。根据世界重要航运公司在各城市的职能分布,建立并验证了基于航运企业价值链接的世界航运中心之间呈现复杂的网络关系,世界航运城市网络具备小世界特征;对该复杂网络进行测度得出:国际航运中心出现向亚太地区转移的趋势;世界航运城市呈现"多核心复杂嵌套式核心—边缘"结构特征;提出了世界航运城市的网络级、核心节点级和边缘节点级3个层次。并建议通过建立航运龙头企业来提升上海在世界航运网络中的地位。

On the Structure and Characteristics of International Shipping Center based on Complex Network Theory

International shipping center is the spatial carriers of shipping industry.With globalization and development of international trade,shipping industry chain distributed in different areas thus form a complicated network.Taking the international shipping centers and Shanghai as research objects,based on the functional division of international shipping companies in the cities,we establish the network of international shipping center.We show the network has the following structural features: the network is small;there is a tendency that the centers are transferring to the Asia-pacific area;and the core-peripheral structure is obvious.Furthermore,we classify the international shipping centers into three levels: the first level is called network city,such as London and New York,in the center of the network.The second level is node cities,such as Shanghai,it is the international periphery but the core of regions.The lowest level is the peripheral node.By establishing strong shipping entenrises to upgrade shipping industry in Shanghai is given.