Study on gravitation between international inland-port and harbor

International Inland-port, as the new product of modern logistics development, which plays the function of the ligament to connect the inland areas with the international markets. In the process of International Inland-port construction and operation, it is a key problem for International Inland-port development and is also the basic point of this paper to choose right cooperative harbor and realize their linkage development. This paper established foreign trade logistics gravitation model of the inland city and the harbor, with the study of a network in forms of 20 optional cities of International Inland-port node and 8 harbors, using the social network analysis and Ucinet software for its quantitative analysis, and it worked out the first choice of cities and their alternative cooperative harbor for establishing our International Inland-port.