The spatial pattern of urbanization in the Shanghai metropolitan area is quantified with GIS-based land use data set and gradient analysis of landscape metrics. A number of landscape metrics were computed along a 64 I...The spatial pattern of urbanization in the Shanghai metropolitan area is quantified with GIS-based land use data set and gradient analysis of landscape metrics. A number of landscape metrics were computed along a 64 Ion long and 6 km wide west-east transect and another 66 km long and 6 km wide south-north transect. The results of transect analysis with class-level metrics showed that the spatial pattern of urbanization could be reliably quantified using landscape metrics with a gradient analysis approach, and the location of the urbanization center could be identified precisely and consistently with multiple indices of the landscape metrics used in this study. Different land use types exhibited distinctive, but not necessarily unique, spatial signatures that were dependent on specific landscape metrics. These results seemed to characterize the urban core of the Shanghai metropolitan area rather accurately and precisely.. Agriculture patches were abundant and less fragmented; the urban land use types were extensive, having many small patches and highly fragmented.展开更多
采用2020年中国家庭追踪调查(China Family Panel Studies,CFPS)数据,探讨了社会阶层对居民健康状况的影响机制.实证分析结果揭示,在健康预防机制方面,社会阶层通过影响生活方式对居民健康产生显著影响.在健康恢复机制方面,社会阶层通...采用2020年中国家庭追踪调查(China Family Panel Studies,CFPS)数据,探讨了社会阶层对居民健康状况的影响机制.实证分析结果揭示,在健康预防机制方面,社会阶层通过影响生活方式对居民健康产生显著影响.在健康恢复机制方面,社会阶层通过影响医疗资源的获取能力间接影响居民健康.研究显示,医疗资源的支出能力和可及性在社会阶层与健康水平关系中具有部分中介效应.展开更多
基金This work was supported by foundation of National Key Fundamental Research and Development Program (2002CB412406)
文摘The spatial pattern of urbanization in the Shanghai metropolitan area is quantified with GIS-based land use data set and gradient analysis of landscape metrics. A number of landscape metrics were computed along a 64 Ion long and 6 km wide west-east transect and another 66 km long and 6 km wide south-north transect. The results of transect analysis with class-level metrics showed that the spatial pattern of urbanization could be reliably quantified using landscape metrics with a gradient analysis approach, and the location of the urbanization center could be identified precisely and consistently with multiple indices of the landscape metrics used in this study. Different land use types exhibited distinctive, but not necessarily unique, spatial signatures that were dependent on specific landscape metrics. These results seemed to characterize the urban core of the Shanghai metropolitan area rather accurately and precisely.. Agriculture patches were abundant and less fragmented; the urban land use types were extensive, having many small patches and highly fragmented.
文摘采用2020年中国家庭追踪调查(China Family Panel Studies,CFPS)数据,探讨了社会阶层对居民健康状况的影响机制.实证分析结果揭示,在健康预防机制方面,社会阶层通过影响生活方式对居民健康产生显著影响.在健康恢复机制方面,社会阶层通过影响医疗资源的获取能力间接影响居民健康.研究显示,医疗资源的支出能力和可及性在社会阶层与健康水平关系中具有部分中介效应.