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arXiv 2002.12036cs.LGcs.ITmath.ITstat.ML
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时间序列分类的复杂性度量与特征

Complexity Measures and Features for Times Series classification

University of Granada(格拉纳达大学)

Francisco J. Baldán, José M. Benítez

摘要:

随着世界数字化的发展,时间序列的分类问题在不同学科中日益突出。目前,时间序列分类的最新技术是基于变换的集合的分层投票集体。该算法由分布在五个大模块中的多个不同领域的分类器组成。每个模块的加权的基础上的内部评估过程中获得的结果的组合,使该算法能够获得最好的结果,在国家的最先进的。一个最近的邻居与动态时间规整仍然是基础分类在任何时间序列分类问题,其简单性和良好的效果。尽管他们的表现,他们有一个共同的弱点,那就是他们是不可解释的。在时间序列分类领域,存在准确性和可解释性之间的权衡。在这项工作中,我们提出了一组能够提取信息的时间序列的结构,面对时间序列分类问题的特征。这些特性的使用允许在时间序列问题中使用传统的分类算法。实验结果表明,我们的建议没有统计上的显着差异,从第二和第三最好的模型的国家的最先进的。除了竞争的结果,在准确性,我们的建议是能够提供可解释的结果的基础上提出的一套特征

英文摘要:

Classification of time series is a growing problem in different disciplines due to the progressive digitalization of the world. Currently, the state-of-the-art in time series classification is dominated by The Hierarchical Vote Collective of Transformation-based Ensembles. This algorithm is composed of several classifiers of different domains distributed in five large modules. The combination of the results obtained by each module weighed based on an internal evaluation process allows this algorithm to obtain the best results in state-of-the-art. One Nearest Neighbour with Dynamic Time Warping remains the base classifier in any time series classification problem for its simplicity and good results. Despite their performance, they share a weakness, which is that they are not interpretable. In the field of time series classification, there is a tradeoff between accuracy and interpretability. In this work, we propose a set of characteristics capable of extracting information on the structure of the time series to face time series classification problems. The use of these characteristics allows the use of traditional classification algorithms in time series problems. The experimental results of our proposal show no statistically significant differences from the second and third best models of the state-of-the-art. Apart from competitive results in accuracy, our proposal is able to offer interpretable results based on the set of characteristics proposed

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