Discovering spatiotemporal flow patterns: where the origin–destination map meets empirical orthogonal function decomposition
Discovering spatiotemporal flow patterns: where the origin–destination map meets empirical orthogonal function decomposition
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发现时空流动模式:起点-目的地地图满足经验正交函数分解的地方
DOI:
10.1080/15230406.2023.2171490
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发表时间:
2023-02
影响因子:
2.5
通讯作者:
Hu Wenqing
中科院分区:
文献类型:
--
作者:
Zhou Mengjie;Fu Qingyang;Li Yige;Wang Yixin;Wang Xiaomi;Hu Wenqing
ABSTRACT Flows are usually represented as vector lines from origins to destinations and can reflect the movements of individuals or groups in space and time. Revealing and analyzing the spatiotemporal flow patterns are conducive to understanding information underlying movements. This paper proposes a new method called the OD – EOF (Origin – Destination – Empirical Orthogonal Function) to discover important spatiotemporal flow patterns on the premise of maintaining the pairwise connections between origins and destinations. We first construct a spatiotemporal flow matrix that contains connection information between origins and destinations and temporal flow information by adding a temporal dimension to the OD map. Then, we decompose the spatiotemporal flow matrix into spatial modes and corresponding time coefficients by EOF decomposition. The decomposition results depict the prominent spatial distribution of and temporal variation in flows, with most of the spatiotemporal characteristics highly concentrated into the first few spatial modes. The method is evaluated by five synthetic datasets and a user study and subsequently applied to analyze the impact of the COVID-19 pandemic on the spatiotemporal patterns of human mobility in China during the Spring Festival travel rush in 2020 and 2021. The results show the prominent spatiotemporal patterns of human mobility during these periods under the influence of the COVID-19 pandemic outbreak and the normalization of pandemic prevention and control.
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DOI:
10.1201/b10345-5
发表时间:
2010-11
期刊:
Encyclopedia of Autism Spectrum Disorders
影响因子:
--
作者:
Kim-Anh Lê Cao;Z. Welham
通讯作者:
Kim-Anh Lê Cao;Z. Welham
影响因子:
3.9
作者:
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Yong Gao;Jiajun Liu;Yan Xu;Lan Mu;Yu Liu
影响因子:
3.6
作者:
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通讯作者:
Tang, Luliang
DOI:
10.5047/eps.2011.07.002
发表时间:
2011-09
期刊:
Earth, Planets and Space
影响因子:
--
作者:
E. Chang;B. Chao
通讯作者:
E. Chang;B. Chao
影响因子:
2.5
作者:
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通讯作者:
B. Jenny;Daniel M. Stephen;Ian Muehlenhaus;Brooke E. Marston;R. Sharma;E. Zhang;H. Jenny