Analysis Of The Urban Hierarchy And The Spatial Structure Which Is Based On The Centricity Of The Beijing-shanghai Urban Traffic Belt

the city is also the embodiment of modern civilization,and is not a balanced development of urbanization process,according to Chris Taylor's central place theory,central city plays an important role in the urbanization process,and for urban centricity research helps reveal urban belt within the hierarchy of the city form and the evolution of urban spatial structure.Current urbanization development in our country at a critical stage,the unbalanced urbanization process,the developed eastern region of the system and the spatial structure of city grading contribute to the development of the less developed areas to provide valuable experience for reference.Based on the analysis of the related research results,on the basis of beijing-shanghai transportation take 21 cities as the research object,based on the understanding of the concept of urban centricity,according to the scientific,integrity,operability,and the principle of highlighting,respectively from the centricity of space interaction,the urban scale centricity centricity,economy,society,mind and internationalization in the centricity five dimensions to establish index system,through the objective and subjective values.the method combined with the original data,get the beijing-shanghai transportation urban belt from city to city in the city of cardiac index,and further analyze the trend of the development of the cities.To reflect the urban spatial structure evolution of space and time for research purposes,from the perspective of time and space dimension,using the neural network model and spatial data field model,the quantitative evaluation due to the cardiac index in the city and urban space radiation scope changes caused by the change of urban spatial organization and different regions and cities in the process of evolution of urban spatial structure characteristic of the present.Research shows that: the scope of the whole urban space radiation showed a trend of expansion,which each subregion space radiation scope expands unceasingly,but expanding space radiation ability difference between the sub area;The integral pattern of the urban hierarchy change is not big,but local changes obviously;Each city urban centricity,urban space radiation scope expanding gradually;Different city urban centricity and uneven spatial distribution of radiation range,and growing "Matthew effect".