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News/ExCal: Optimization-Free Multivariate Time Series Anomaly Detection via Excess Calibration
arxiv
PublishedOctober 28, 2026 at 4:00 AM

ExCal: Optimization-Free Multivariate Time Series Anomaly Detection via Excess Calibration

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arXiv:2610.35568v1 Announce Type: new Abstract: We introduce ExCal, a normal-only multivariate time series anomaly detector that combines raw state retrieval, a signal/derivative subspace, and robust statistics across temporal scales. Each expert map receives a high normality floor from the training

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