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arXiv 1702.07007stat.MEphysics.ao-phstat.AP
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检测大型非线性时间序列数据集中的因果关系

Detecting causal associations in large nonlinear time series datasets

Jakob Runge, Peer Nowack, Marlene Kretschmer, Seth Flaxman, Dino Sejdinovic

摘要:

从观测的时间序列数据中识别因果关系是气候科学或神经科学等学科的一个关键问题,在这些学科中,实验往往是不可能的。数据驱动的因果推断是具有挑战性的,因为数据集通常是高维的和非线性的,具有有限的样本量。在这里,我们介绍了一种新的方法,灵活地结合线性或非线性条件独立性测试的因果发现算法,允许重建因果网络从大规模的时间序列数据集。我们验证了一个完善的气候遥相关连接热带太平洋与热带以外的温度,并使用大规模的模拟真实数据的典型属性的合成数据集的方法。实验表明,我们的方法优于其他技术的检测能力,从小到大规模的数据集,并开辟了全新的可能性,发现因果网络从时间序列在一系列的研究领域。

英文摘要:

Identifying causal relationships from observational time series data is a key problem in disciplines such as climate science or neuroscience, where experiments are often not possible. Data-driven causal inference is challenging since datasets are often high-dimensional and nonlinear with limited sample sizes. Here we introduce a novel method that flexibly combines linear or nonlinear conditional independence tests with a causal discovery algorithm that allows to reconstruct causal networks from large-scale time series datasets. We validate the method on a well-established climatic teleconnection connecting the tropical Pacific with extra-tropical temperatures and using large-scale synthetic datasets mimicking the typical properties of real data. The experiments demonstrate that our method outperforms alternative techniques in detection power from small to large-scale datasets and opens up entirely new possibilities to discover causal networks from time series across a range of research fields.

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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