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HYDRA: A Multi-Level Hierarchy-Driven Approach for Robust Anomaly Detection in Time Series
Summary: HYDRA is an unsupervised, normalization-light detector combining graph-selected approximate nearest neighbors with fine-to-coarse, multi-resolution anomaly evidence. Its hierarchical ensemble robustly detects isolated and persistent anomalies, ranking first on 40 TSB-AD datasets while scaling to ultra-long series.
(summarized by gpt-5.6-luna on Jul 26 2026)
Paper ID
hbc5e67f9c0a63c7f
Venue
SIGMOD
Year
2026
Pagerank
4.9769913e-05
Overall Rank
10,480 | 29.57%
DOI
10.1145/3802074
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(CC BY 4.0)
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Authors
1.
Mingyi Huang
(Ohio State University)
2.
Qinghua Liu
(Ohio State University)
3.
Paul Boniol
(CNRS; INRIA; Paris Sciences et Lettres University; École Normale Supérieure)
4.
John Paparrizos
(Aristotle University of Thessaloniki; Ohio State University)
BibTeX Citation
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@inproceedings{huang_sigmod26,
title = {{HYDRA: A Multi-Level Hierarchy-Driven Approach for Robust Anomaly Detection in Time Series}},
author = {Huang, Mingyi and Liu, Qinghua and Boniol, Paul and Paparrizos, John},
series = {{SIGMOD} '26},
booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
publisher = {Association for Computing Machinery},
doi = {10.1145/3802074},
url = {https://dl.acm.org/doi/10.1145/3802074},
year = {2026}
}
Incoming Citations (Sorted by Pagerank)
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