arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.11483cs.SIcs.LGphysics.soc-phstat.ML
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时序网络时空数据分析

Spatiotemporal data analysis with chronological networks

National Institute for Space Research(巴西国家空间研究院);Humboldt University(洪堡大学);University of Campinas(坎皮纳斯大学);Indiana University(印第安纳大学);Federal University of São Paulo(圣保罗联邦大学);University of São Paulo(圣保罗大学);Potsdam Institute for Climate Impact Research(波茨坦气候影响研究所)

Leonardo N. Ferreira, Didier A. Vega-Oliveros, Moshe Cotacallapa, Manoel F. Cardoso, Marcos G. Quiles, Liang Zhao, Elbert E. N. Macau

摘要:

近年来,来自不同领域的时空数据集的数量和规模都在迅速增长,这就要求开发鲁棒和快速的方法来分析和提取信息。在本文中,我们提出了一个基于网络的时空数据分析模型称为chronnet。它包括将几何空间划分为按时间顺序连接的节点所表示的网格单元。该模型的主要目标是表示网络中具有强链接的细胞之间的连续复发事件。这种表示允许使用网络科学和图形挖掘工具从时空数据中提取信息。chronnet的构建过程非常快,这使得它适用于大型数据集。在本文中,我们描述了如何使用我们的模型,考虑人工和真实的数据。为此,我们提出了一个人工时空数据集生成器来展示chronnets如何捕捉不仅仅是简单的统计数据,而且还频繁的模式,空间变化,离群值和时空集群。此外,我们分析了一个真实世界的数据集组成的全球火灾探测,在其中我们描述了火灾事件的频率,异常火灾探测,和季节性活动,使用一个单一的chronnet。

英文摘要:

The amount and size of spatiotemporal data sets from different domains have been rapidly increasing in the last years, which demands the development of robust and fast methods to analyze and extract information from them. In this paper, we propose a network-based model for spatiotemporal data analysis called chronnet. It consists of dividing a geometrical space into grid cells represented by nodes connected chronologically. The main goal of this model is to represent consecutive recurrent events between cells with strong links in the network. This representation permits the use of network science and graphing mining tools to extract information from spatiotemporal data. The chronnet construction process is fast, which makes it suitable for large data sets. In this paper, we describe how to use our model considering artificial and real data. For this purpose, we propose an artificial spatiotemporal data set generator to show how chronnets capture not just simple statistics, but also frequent patterns, spatial changes, outliers, and spatiotemporal clusters. Additionally, we analyze a real-world data set composed of global fire detections, in which we describe the frequency of fire events, outlier fire detections, and the seasonal activity, using a single chronnet.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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