Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Robust and Explainable Autoencoders for Unsupervised Time Series Outlier
  Detection---Extended Version   Time series data occurs widely, and outlier detection is a fundamental
problem in data mining, which has numerous applications. Existing
autoencoder-based approaches deliver state-of-the-art performance on
challenging real-world data but are vulnerable to outliers and exhibit low
explainability. To address these two limitations, we propose robust and
explainable unsupervised autoencoder frameworks that decompose an input time
series into a clean time series and an outlier time series using autoencoders.
Improved explainability is achieved because clean time series are better
explained with easy-to-understand patterns such as trends and periodicities. We
provide insight into this by means of a post-hoc explainability analysis and
empirical studies. In addition, since outliers are separated from clean time
series iteratively, our approach offers improved robustness to outliers, which
in turn improves accuracy. We evaluate our approach on five real-world datasets
and report improvements over the state-of-the-art approaches in terms of
robustness and explainability.
  This is an extended version of "Robust and Explainable Autoencoders for
Unsupervised Time Series Outlier Detection", to appear in IEEE ICDE 2022.

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The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg