arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.06361cs.LGcs.NEcs.SYeess.SYstat.ML
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一种用于时间序列变化点检测的一类支持向量机校准方法

A One-Class Support Vector Machine Calibration Method for Time Series Change Point Detection

Department of EECS, University of California, Berkeley(加州大学伯克利分校电子工程与计算机科学系);California Institute of Technology(加州理工学院);Institute of Data Science, National University of Singapore(新加坡国立大学数据科学研究所)

Baihong Jin, Yuxin Chen, Dan Li, Kameshwar Poolla, Alberto Sangiovanni-Vincentelli

AI总结:

本文提出了一种校准一类支持向量机(OC-SVM)的方法,用于时间序列变化点检测,通过启发式搜索方法找到输入数据和超参数的最优组合,实验表明OC-SVM在少量训练数据下也能有效检测变化点,优于现有深度学习方法。

摘要:

识别系统健康状态的变化点对于检测发展中的初始故障至关重要。一类支持向量机(OC-SVM)是一种流行的机器学习模型,用于异常检测,因此可用于识别变化点;然而,有时难以获得一个能够用于传感器测量时间序列以识别系统健康状态变化点的良好的OC-SVM模型。在本文中,我们提出了一种新颖的OC-SVM模型校准方法。该方法使用启发式搜索方法来寻找一组良好的输入数据和超参数,以产生一个表现良好的模型。我们在C-MAPSS数据集上的结果表明,OC-SVM在使用较少训练数据的情况下也能在时间序列中实现满意的准确性,相较于最先进的深度学习方法。在我们的案例研究中,通过所提出的模型校准的OC-SVM在训练数据有限的情况下显示出特别的实用性。

英文摘要:

It is important to identify the change point of a system's health status, which usually signifies an incipient fault under development. The One-Class Support Vector Machine (OC-SVM) is a popular machine learning model for anomaly detection and hence could be used for identifying change points; however, it is sometimes difficult to obtain a good OC-SVM model that can be used on sensor measurement time series to identify the change points in system health status. In this paper, we propose a novel approach for calibrating OC-SVM models. The approach uses a heuristic search method to find a good set of input data and hyperparameters that yield a well-performing model. Our results on the C-MAPSS dataset demonstrate that OC-SVM can also achieve satisfactory accuracy in detecting change point in time series with fewer training data, compared to state-of-the-art deep learning approaches. In our case study, the OC-SVM calibrated by the proposed model is shown to be useful especially in scenarios with limited amount of training data.

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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