| Our country has entered a new stage of transformation and development emphasizing human-centered and quality improvement.Urban renewal has become the top priority of China’s social and economic development and the main work of China’s urbanization in the second half.The old urban area is often faced with the dilemma of material decline and vitality fading,and it is the oldest,most complex and most urgent area to be renewed in urban material environment.historic urban areas are typical of old and old urban areas,and also belong to historic heritages.Its vitality construction is not only for the improvement of living environment,but also for the inheritance and protection of history and culture,which helps to establish the confidence of national culture.At the same time,the application of new data has become the trend of urban vitality research,but the existing research lacks systematic comprehensive quantitative study of historic urban spatial vitality.Based on this background,in order to better realize the vitality construction and renewal of the historic city,the characteristics and influencing factors of its spatial vitality were explored.Firstly,this thesis discusses the essence of space vitality by combing the classical basic theories of space vitality at home and abroad,and clarifies the connotation and internal relationship of space vitality.Then,the content of the evaluation of the spatial vitality of the historic urban area is determined to include two aspects: the vitality state and the vitality factor.From the dynamic and static dimensions of the vitality state and the four dimensions of the vitality factor: history and culture,space environment,functional services and traffic conditions,the selection of specific indicators is optimized and the quantification method is determined.Thus,the thesis extracts the vitality evaluation index system,realizes the construction of the theory and method of historic urban space vitality,and provides a method for empirical research.After that,this study took the ancient city of Suzhou as an empirical study,established a multi-source database of spatial vitality,and divided the research units and classified their functions and properties.Then,the thesis evaluates and analyzes the characteristics of Suzhou Ancient City from two aspects of vitality state and vitality factor,and summarizes the spatial and temporal distribution characteristics of Suzhou Ancient City’s spatial vitality at the overall level and different types of block level,as well as the numerical law and spatial distribution characteristics of vitality factor.The results show that the spatial vitality of Suzhou Ancient City has obvious spatio-temporal differentiation.The overall distribution of spatial vitality shows an obvious characteristic of "high in the north and low in the south,concentrated in the center,axial extension,and cold in the outer circle".Guanqian Commercial District is the absolute core of vitality.In terms of vitality change,the daily fluctuation curve presents a "double peak type",and the vitality of the ancient city decreases obviously at night,but the waterfront business district and the cultural and tourism area open at night have great attraction at night.The distribution of vitality factors also showed different spatial differentiation,and most of the factors showed local agglomeration characteristics.Finally,the influence analysis of the quantitative results of vitality factors and the daily average vitality intensity of each block in Suzhou city was conducted by using geographic detector and Pearson correlation analysis tool,and the influence mechanism of vitality factors on vitality state was discussed.The results show that the influence of vitality factor is hierarchical,and the functional service dimension factor has the highest level,which determines the magnitude of vitality intensity of a block.Finally,based on the influence mechanism and from the perspective of vitality factor,the corresponding vitality optimization strategy is proposed. |
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