Human diffusion and city influence
Human diffusion and city influence
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DOI：
10.1098/rsif.2015.0473
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发表时间：
2015-08-06
影响因子：
3.9
通讯作者：
Ramasco, Jose J.
中科院分区：
文献类型：
--
作者：
Lenormand, Maxime;Goncalves, Bruno;Ramasco, Jose J.
城市的特点是人口、经济活动和服务集中。然而，并不是所有的城市都是平等的，一个地方、区域或全球规模的自然等级制度自发地出现了。在这项工作中，我们介绍了一种方法，使用地理位置推文来量化城市影响力，以表征人类的流动性。罗马和巴黎似乎一直是吸引最多样化游客的城市。事实证明，本地人和外地游客之间的比例是一个城市真正走向全球的基础。只关注城市居民的流动，就可以构建城市间的网络。这个网络使我们能够在不同的尺度上分析中心性衡量标准。纽约和伦敦在全球范围内发挥着核心作用，而如果将重点放在地区层面，城市排名将发生重大变化。
Cities are characterized by concentrating population, economic activity and services. However, not all cities are equal and a natural hierarchy at local, regional or global scales spontaneously emerges. In this work, we introduce a method to quantify city influence using geolocated tweets to characterize human mobility. Rome and Paris appear consistently as the cities attracting most diverse visitors. The ratio between locals and non-local visitors turns out to be fundamental for a city to truly be global. Focusing only on urban residents' mobility flows, a city-to-city network can be constructed. This network allows us to analyse centrality measures at different scales. New York and London play a central role on the global scale, while urban rankings suffer substantial changes if the focus is set at a regional level.