随着改革开放后的快速城市化，许多历史老城在发展过程中由于经济增长的需求，进行了现代化的城市建设。老城的空间形态发生了巨大的变化，许多历史遗留下来的传统城市格局逐渐被现代化城市空间替代。而当今城市发展已经由增量发展转为存量发展，老城的城市更新逐步转为存量更新，不再大规模拆旧建新。苏州老城是最早被列入国家历史文化名城的古城之一，古城的格局被完整的保存下来。而在现代化的进程中，城市功能和空间的演进使得苏州老城里传统古城空间与现代化的城市空间并存，二者相互融合的特征。现阶段我国经济发展进入高质量的发展阶段，城市发展进入存量发展阶段，要求在既有的城市空间内提升经济和社会活力。对于物质空间环境老旧的老城，在城市更新的过程中，面临重新激活衰退地区，增长区域吸引力的新挑战。本文研究以苏州老城为研究对象，以老城活力特征为着眼点，分析活力的构成要素、时空特征和各类要素与活力之间的相关性。首先界定了老城的活力构成，分为空间形态、功能区位和人群活动三个方面。接下来借助卫星影像、历史地图、功能POI数据、以及GIS空间分析对老城的空间形态、功能区位特征进行定性与定量的描述。再通过对手机信令数据的挖掘，对老城内的人群活动进行分类时空分析，对瞬时聚集度和驻留活动两个方面进行量化描述。然后借助多元相关性分析的方法，对空间形态与人群活动、功能区位与人群活动两组数据耦合分析，探索空间和功能对人群活动的关联影响。最后选取观前街和五卅路两个代表性街区的案例，深入探讨了老城不同空间、功能环境和人群活动规律如何影响城市活力。研究结果表明，苏州老城内不同区域空间形态差异较大，人群时空聚集规律潮汐变化大，在老城内部，。商业、居住、历史文化遗产为主的功能要素，和城市空间属于传统或现代化不同属性都对活力空间存在显著相关性。
With the rapid urbanization process after the reform and opening up in the 1980s, many historical old cities have tremendous changes in the spatial form due to the needs of economic growth, and the traditional urban space has been more or less reduced. The reconstruction of urban functions and spaces makes the old city in a special area where tradition and modernity are integrated. Though high vitality is the basis for the stable development of a city. So in the process of urban renewal, the historic city faced with the problem of reactivating declining areas and improving the quality of development.This paper takes the historic city of Suzhou as the research object, focuses on the vitality of the city, and divides the vitality of the historic city into three aspects: spatial form, functional location and people to analyze its features. On mesuring characteristic of people, the paper divided it into two types, gathering degree and the resident activity. The conclusion of spatiotemporal features of the vitality of the old city are discussed according to the difference of crowd attributes. In additon, this paper uses the method of correlation analysis to discuss the influence relationship between space, function and people, and discussed their correlation factors. Finally, this paper takes two blocks as represents to analyze the flow people and activity patterns.The study found that the spatial distribution of vitality in the old city of Suzhou has a multi-center and scattered structure, with obvious differences in time and space, and the differences are more diverse for people with different attributes such as age composition, work-housing commuting, and whether they live in the local area. Commercial, residential, historical and cultural heritage-based functional elements, and the different attributes of urban space belonging to
