| As a window of opening to the outside world,port can not only promote the development of port cities,but also promote the development of surrounding cities.The coordinated development of Jing-Jin-Ji puts forward that the interaction between the post Jin-Ji Port and the Jing-Jin-Ji region is more and more close,and the coordinated development of the two is the objective requirement to achieve regional economic growth.In the past,there have been researches on the coordinated development of Jin-Ji Port and its hinterland cities,but most of them are about the coordinated development between the port and the port city.The realization of the coordinated development of Jing-Jin-Ji requires not only the coordinated development between the port and the port city,but also the coordinated development between the port and its main service cities.This paper first analyzes the development status of Jin-Ji ports and cities in Jing-Jin-Ji,and then improves the existing gravity model by adding the port strength value and the strength value of hinterland cities.The existing gravity model only considers the simplification of GDP index when studying the gravity of the two places.Considering the comprehensive and complex characteristics of port and hinterland City,the existing gravity model is improved by adding port strength value and hinterland city strength value.And the improved gravity model is used to calculate the gravity value of each port to each city in Jing-Jin-Ji region.According to the gravity value,the main service cities of each port in Jing-Jin-Ji region are determined to make it more targeted to study the collaborative development and evolution of the port and its service hinterland cities.Finally,based on the research of relevant literature,combined with the development characteristics of ports and hinterland cities,this paper constructs the "port abdomen" collaborative development index system,and uses the collaborative development evaluation model to study the collaborative development of ports and hinterland cities in Jing-Jin-Ji based on the index data of ports and hinterland cities in 2008-2017,and to study the collaborative development of ports and hinterland cities in 2008-2017 According to the coordination degree between ports and their hinterland cities,this paper studies the evolution of the coordinated development of ports and their hinterland cities in 2008-2017,and puts forward countermeasures for the better coordinated development of ports and hinterland. |
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