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arXiv 2402.02032cs.LG
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RobustTSF:面向含异常时间序列鲁棒预测的理论与设计

RobustTSF: Towards Theory and Design of Robust Time Series Forecasting with Anomalies

University of California, Santa Cruz(加州大学圣克鲁兹分校);Alibaba Group(阿里巴巴集团)

Hao Cheng, Qingsong Wen, Yang Liu, Liang Sun

AI总结:

本文针对含异常时间序列的鲁棒预测问题,定义了三种异常类型,分析损失与样本鲁棒性,提出简单高效算法,实验证明其优于现有方法。

摘要:

时间序列预测是许多实际应用中的重要前沿任务。然而,大多数时间序列预测技术假设训练数据是干净的,不含异常。这一假设是不现实的,因为实际中收集的时间序列数据可能受到污染。如果直接用含异常的时间序列训练预测模型,模型性能会较差。因此,开发从污染数据中自动学习鲁棒预测模型的方法至关重要。本文首先从统计学上定义了三种类型的异常,然后从理论和实验上分析了这些异常存在时的损失鲁棒性和样本鲁棒性。基于我们的分析,我们提出了一种简单高效的算法来学习鲁棒预测模型。大量实验表明,我们的方法高度鲁棒,并优于所有现有方法。代码可在 https://github.com/haochenglouis/RobustTSF 获取。

英文摘要:

Time series forecasting is an important and forefront task in many real-world applications. However, most of time series forecasting techniques assume that the training data is clean without anomalies. This assumption is unrealistic since the collected time series data can be contaminated in practice. The forecasting model will be inferior if it is directly trained by time series with anomalies. Thus it is essential to develop methods to automatically learn a robust forecasting model from the contaminated data. In this paper, we first statistically define three types of anomalies, then theoretically and experimentally analyze the loss robustness and sample robustness when these anomalies exist. Based on our analyses, we propose a simple and efficient algorithm to learn a robust forecasting model. Extensive experiments show that our method is highly robust and outperforms all existing approaches. The code is available at https://github.com/haochenglouis/RobustTSF.

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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