| In the past few decades,the planning and construction of new towns in China have been based on a single material space,and the practice and efforts to create new towns’ vitality from the perspective of people are not good because of the excessive pursuit of the grand narrative and economic efficiency of space.Since the 21 st century,with the rise of humanism,how to create new city vitality based on people has become an important issue of new city planning and construction.Relevant scholars have carried out a large number of empirical studies,mainly on the micro scale of streets and public space.They believe that urban vitality consists of two parts: the external characteristics of people’s space activities and environmental factors,and try to reveal the relationship between these two parts,in order to guide the innovation of urban space construction methodology.Therefore,the current research pays more attention to methodology than epistemology,pays more attention to the influence of micro individual behavior and built environment on the vitality of urban space,and ignores the influence of large-scale spatial interaction on urban vitality.Based on the previous research,this study focuses on the meso spatial scale of regulatory detailed planning,extends the cognition of complex urban vitality phenomenon from the new spatial dimension of spatial interaction potential,and establishes the theoretical framework of urban vitality research,that is,the research of urban vitality representation.Specifically,it includes three aspects: the basic unit of vitality(i.e."subject"),the spatial distribution characteristics of vitality subject and the potential of spatial interaction of subject.Among them,the main body of vitality is "human space" isomorphism,and its basic spatial unit is urban land with clear ownership.At the same time,taking Zhujiang New City,the most dynamic urban new area in Guangzhou,as an example,the empirical research is carried out based on the data of street traffic and spatial characteristics collected by the team during the whole day.Based on the characteristics of all kinds of "human space" isomorphism,from the two dimensions of vitality and built environment,on the basis of land use function,11 types of vitality subjects are identified by cluster analysis.Then,the pedestrian interaction potential network and the functional interaction potential network are constructed respectively.The distribution characteristics of all kinds of dynamic subjects are analyzed from three aspects: the heat sequence,the spatial distribution and the importance of the network.Finally,based on the discovery of the network community,this paper makes a deep discussion on the reorganization of the dynamic subjects in the two network communities.It is found that under different spatialinteraction potential networks,the interaction between dynamic subjects changes,forming network community reorganization,and showing that the dynamic subject relationship of the high dynamic hot community is stable,while the dynamic subject relationship of the low dynamic hot community is not stable.This is because different spatial planning schemes have different empowering effects on regional vitality.If the planning schemes can simultaneously meet the requirements of rich types of vitality subjects,balanced area ratio and proximity of geographical relations,it will help to create regional vitality.The empirical research of this paper shows the theoretical framework and methodology of the research on the representation of urban vitality.It supplements the existing research deficiencies from two aspects: the expansion of spatial scale and the extension of spatial dimension.It is helpful to understand the empirical typical cases of greater scale,more diversified and complex urban vitality phenomenon and increase the value-The deep mechanism of "space" isomorphism can also provide useful reference for the innovation of urban dynamic space construction methods. |
