中文摘要：

在面向提升居民生活质量的时空间行为研究中,居住地作为最重要的锚点之一,一直是关注的焦点和最为常用的地理背景范围。但是综合考虑到居民的整日活动安排与地理背景的动态性,居住地以外的地理背景同样对居民活动存在相当程度的影响。基于西宁市的实证研究,结合城市中不同区位地理背景影响差异性,对西宁市城市空间居民的活动空间、地理背景分异进行讨论,以验证各区位采取不同地理背景范围时其中的建成环境对居民活动的解释力,总结行为分析时适宜的地理背景范围。研究认为中心城区居民受强制性工作活动影响,仅以居住地为地理背景范围时,建成环境对活动空间没有显著影响,扩展到活动地的地理背景范围时可以对居民活动空间进行解释;近郊区以居住地和活动地作为地理背景均可以在一定程度对空间行为进行解释,活动空间模型更优;远郊区考虑活动空间地理背景时可以对空间行为影响因素进行讨论。研究结果一方面对地理背景不确定性问题补充了实证说明;另一方面对理解居民生活方式与对城市空间的利用具有现实意义。

英文摘要：

The uncertain geographic problems （UGCoP）, an emerging theory in space-time behavior research, addresses moving beyond the conventional focus on residential neighborhood towards activity space in defining geographic context in order to achieve better explanatory power. This research proposes a hypothesis that geographic context needs to be defined differently in terms of residential locations, and explores the spatial variations of explanatory power of different geographic-context measures based on the space-time behavior analysis in Xining, China. The empirical study has yielded interesting findings. Firstly, for the residents living in the city center, there is no significant effect of built environment variables on individual activity space if merely defining geographic context by residential neighborhood, while extending the geographic context to activity places can enhance explanatory power. Secondly, for those living in the inner suburb, both residential neighborhood and activity places are proved to be ideal measures of geographic context, while activity places perform better. Similar to the city center and inner suburb, for those living in the outer suburb, the measures of geographic context by activity places are found more efficient than residential neighborhood. The above- mentioned findings can lead to a conclusion that the variations of residential locations contribute to the uncertainty of geographic contextual effects on space-time behavior, which extends the existing literature on uncertain geographic context problems.