The compact muon solenoid (CMS) experiment is a general-purpose detector for
high-energy collision at the large hadron collider (LHC) at CERN. It employs an
online data quality monitoring (DQM) system to promptly spot and diagnose
particle data acquisition problems to avoid data quality loss. In this study,
we present semi-supervised spatio-temporal anomaly detection (AD) monitoring
for the physics particle reading channels of the hadronic calorimeter (HCAL) of
the CMS using three-dimensional digi-occupancy map data of the DQM. We propose
the GraphSTAD system, which employs convolutional and graph neural networks to
learn local spatial characteristics induced by particles traversing the
detector, and global behavior owing to shared backend circuit connections and
housing boxes of the channels, respectively. Recurrent neural networks capture
the temporal evolution of the extracted spatial features. We have validated the
accuracy of the proposed AD system in capturing diverse channel fault types
using the LHC Run-2 collision data sets. The GraphSTAD system has achieved
production-level accuracy and is being integrated into the CMS core production
system--for real-time monitoring of the HCAL. We have also provided a
quantitative performance comparison with alternative benchmark models to
demonstrate the promising leverage of the presented system.

本研究提出了一种基于图神经网络的在线数据质量监测系统，用于监测大型强子对撞机在 CMS 的强子量测通道中出现的异常情况，并通过验证实验表明该系统在捕捉不同类型的通道故障方面具有高准确性。

利用图网络进行时空异常检测的强子量能器数据质量监测

Spatio-Temporal Anomaly Detection with Graph Networks for Data Quality  Monitoring of the Hadron Calorimeter

Videos represent the primary source of information for surveillance
applications and are available in large amounts but in most cases contain
little or no annotation for supervised learning. This article reviews the
state-of-the-art deep learning based methods for video anomaly detection and
categorizes them based on the type of model and criteria of detection. We also
perform simple studies to understand the different approaches and provide the
criteria of evaluation for spatio-temporal anomaly detection.

通过回顾基于深度学习的视频异常检测的最新方法，基于模型类型和检测标准进行分类，并进行了简单的研究来了解不同的方法，并提供了时空异常检测的评估标准。