arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.00873cs.LGstat.ML
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多变量时间序列特征提取的广义特征方法

A Generalised Signature Method for Multivariate Time Series Feature Extraction

University of Oxford(牛津大学);The Alan Turing Institute(艾伦·图灵研究所);Sorbonne Université(索邦大学)

James Morrill, Adeline Fermanian, Patrick Kidger, Terry Lyons

摘要:

“签名方法”是指一系列用于多变量时间序列的特征提取技术,源自控制微分方程理论。如何应用这种方法有很大的灵活性。一方面,这种灵活性允许该方法针对特定问题进行定制,但另一方面,可能会使精确的应用具有挑战性。本文有两个贡献。首先,签名方法的变化被统一到一个通用的方法,\emph{generalised signature method},其中以前的变化是特殊情况。这个统一框架的主要目的是使签名方法更容易被任何机器学习从业者使用,而现在它主要由专家使用。其次,在这个框架内,我们得到了一个规范的选择,提供了一个域不可知的起点。我们得出这些选择作为一个广泛的实证研究的结果,对26个数据集,并继续显示竞争力的性能对当前的基准多变量时间序列分类。最后,为了简化实际应用,我们将我们的技术作为开源项目的一部分。

英文摘要:

The 'signature method' refers to a collection of feature extraction techniques for multivariate time series, derived from the theory of controlled differential equations. There is a great deal of flexibility as to how this method can be applied. On the one hand, this flexibility allows the method to be tailored to specific problems, but on the other hand, can make precise application challenging. This paper makes two contributions. First, the variations on the signature method are unified into a general approach, the \emph{generalised signature method}, of which previous variations are special cases. A primary aim of this unifying framework is to make the signature method more accessible to any machine learning practitioner, whereas it is now mostly used by specialists. Second, and within this framework, we derive a canonical collection of choices that provide a domain-agnostic starting point. We derive these choices as a result of an extensive empirical study on 26 datasets and go on to show competitive performance against current benchmarks for multivariate time series classification. Finally, to ease practical application, we make our techniques available as part of the open-source [redacted] project.

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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