| National-level New Area is a policy demonstration zone at the national level that promotes regional economic growth with partial urban development.It also has the dual attributes of urban new districts and national regional policies.From the Pudong New Area to the Xiong’an New Area,National-level New Area policy has experienced three stages: pilot exploration,strategic layout,and policy inclusive.The 19 National-level New Areas with wide distribution have become the regional growth of provincial units.The product of the gradual release of the national strategy is very different.In order to explore the different development results brought by the same policy framework in different regions,this paper selects 17 National-level New Areas except Zhoushan New Area and Xiong’an New Area as the research object.with nighttime lighting remote sensing image and LBS data in 2012-2018.Based on the analysis of nighttime lighting remote sensing image in 2012-2018,LBS data,POI data and various statistical data,the interval difference between the vitality of National-level New Area is described from the two dimensions of breadth and intensity,and the differences caused by the growth of breadth and intensity are analyzed.Secondly,select the index system of vitality influencing factors,constructing a regression model,and exploring different factors that shape the regional differences in policy effects in addition to the geology itself and the differences in development stages.In terms of vitality performance,through statistical analysis of data,it is found that the process of construction and development of National-level New Area generally first achieves the improvement of vitality breadth through capital investment and infrastructure construction.Secondly,the accumulation of substantial economic production brings about the improvement of vitality intensity.The two stages often cannot happen synchronously,which leads to problems such as the stage "ghost town".There are three types of growth in the National-level New Area: balanced,lagging and leading,which means the vitality growth rate of Nationallevel New Area is close to,backward and ahead of the central area of the city.Most of the national new districts are balanced and are new growth points for urban development.A number of western National-level New Area are lagging behind,reflecting that National-level New Area are not the only construction focus of western cities and the growth characteristics of the extension and expansion of western cities.Nansha New Area in Guangzhou is a leading area for urban expansion.In terms of vitality influencing factors,it is found through multivariate linear regression model that the time of conception of National-level New Area is more important than the establishment time.The time of enlightenment of the new district has a significant impact on the vitality breadth and vitality intensity,especially vitality breadth.There are differences in the factors affecting the vitality breadth and vitality intensity of National-level New Area.The economic strength of the city,the location conditions of the new district,and the impact of rail transit on the intensity of the vitality are significant,while the breadth of vitality is related to the compactness of the planning layout.The economic strength has little impact on the vitality breadth.That is,vitality breadth is determined by urban planning and investment construction,and vitality intensity is the concentration of actual economic factors affected by urban energy level,location,and infrastructure investment.In addition,in the national block level of National-level New Area,the increase in landuse density,landuse mix and accessibility of the subway station can significantly promote the vitality intensity,that is,the efficient use of land and the improvement of traffic convenience in National-level New Area will promote the vitality intensity of inner block... |
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