| As an important strategic resource,the flow characteristics and problems of population closely affect the economic and social development of the city,and the population flow of Tianjin is a profound impact on the process of coordinated development of Beijing,Tianjin and Hebei.The core of the Beijing-Tianjin-Hebei coordinated development strategy is the coordinated development of Beijing,Tianjin and Hebei as a whole,and with the "relief of Beijing’s non-capital functions" as the basic starting point,we will effectively improve the collaborative agglomeration capacity of industries and transportation facilities,gradually guide the transfer of the population of Beijing-Tianjin-Hebei to coastal areas,and alleviate the pressure of excessive population gathering in Beijing.However,in the actual implementation of the strategy,due to the many factors affecting population mobility,the cross-regional population movement in Beijing,Tianjin and Hebei has not been fully developed according to the plan.In this paper,the characteristics and influencing factors of population mobility in Tianjin under the background of the coordinated development of Beijing-Tianjin-Hebei are used as the research objects,and they are deeply analyzed and studied.Based on the field dynamic theory,circle structure theory,push and pull theory,public choice theory and population dividend theory related to population mobility,this paper sorts out and analyzes the four aspects of flow quantity,mobility tendency,age structure of floating population and education level of floating population,summarizes the characteristics of population mobility in various aspects of Tianjin,and on this basis,explores the population flow problems in Tianjin at different stages and directions.According to the time node of major floating population changes in Tianjin and the relevant literature on population mobility in Tianjin,the influencing factors of population mobility are analyzed,namely the factors affecting the impact of social life environment,the influencing factors of industry development and individual demand development,the factors of urban life pressure and the influencing factors of population mobility system.In view of the four influencing factors,this paper analyzes the development status level of Tianjin in these four aspects,thereby analyzing the attractiveness level of Tianjin to population flow,and then establishing the evolutionary game model of Tianjin population flow and Tianjin Municipal Government,taking the four influencing factors analyzed above as the model change parameters,making a simulation experiment of population flow in Tianjin under parameter changes,and detecting the change trend and results of population flow in Tianjin with the change of influencing factors.And find an ideal equilibrium that can make the floating population and the city government win-win situation.Finally,according to the current urban status of tianjin’s population mobility problems and influencing factors studied above,the countermeasures and suggestions for improvement are given from the four aspects of social living environment,industry development and individual needs,urban living pressure and system. |