Residential differentiation is an essential component of socio-spatial differentiation,but only part of it,since there might be considerable differences in urban social space structure at different times and in a different context because of the high mobility of urban population.However,integrated and comparative research of urban social space that integrates multiple temporal and spatial scales as well as multi-domain dimensions at home and abroad is still in its infancy.Based on mobile terminal user portrait data supported by big data environment and Al simulation technology,this paper explores the spatial differentiation pattern of daytime activities(10:00-17:00)and night residence(21:00-06:00)of social groups in Nanjing inner city,and conducts a comparative study of multi-dimensional and multi-scale spatial differentiation indexes.The research finds that:(1)Both similarity and difference exist in the spatial distribution of day/night social groups.There is a large proportion of middle-aged rich groups along Beijing West Road and Beijing East Road,and a high density of local elderly residents in the north and south of the city.In the city center,there are a large number of white-collar employees during the day and a mix of different social groups at night.(2)Different from the existing research findings in European and American countries,the daily mobility of urban population does not mitigate the socio-spatial differentiation.The spatial differentiation degree of most social attribute indicators,such as gender,occupation and consuming capacity on the street,community and grid scales,shows that daytime activities are higher than nighttime residence.(3)The scale effect of socio-spatial differentiation is significant,more specifically,not only the spatial differentiation index of smaller scale units is higher,but subtler even different socio-spatial differentiation can be revealed from smaller scale units,and this differentiation can be evidently presented by cross-scale comparison.As an exploratory attempt to the problem of"multi-contextual segregation"in social space,it is conducive to construct the research framework of urban social space integrating multi-space,multi-dimension and cross-domain,and further expanding the theory and practice of urban socio-spatial differentiation in China.
social spaceresidential differentiationmultiscaledaytime activitiesnight residenceNanjing inner city
维普
万方数据
