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Prompt and accurate detection of system anomalies is essential to ensure the reliability of software systems. Unlike manual efforts that exploit all available run-time information, existing approaches usually leverage only a single type of…

Software Engineering · Computer Science 2023-02-16 Baitong Li , Tianyi Yang , Zhuangbin Chen , Yuxin Su , Yongqiang Yang , Michael R. Lyu

Anomaly detection on dynamic graphs refers to detecting entities whose behaviors obviously deviate from the norms observed within graphs and their temporal information. This field has drawn increasing attention due to its application in…

Machine Learning · Computer Science 2023-10-26 Shiqi Lou , Qingyue Zhang , Shujie Yang , Yuyang Tian , Zhaoxuan Tan , Minnan Luo

The Fair Graph Anomaly Detection (FairGAD) problem aims to accurately detect anomalous nodes in an input graph while avoiding biased predictions against individuals from sensitive subgroups. However, the current literature does not…

Social and Information Networks · Computer Science 2024-07-30 Neng Kai Nigel Neo , Yeon-Chang Lee , Yiqiao Jin , Sang-Wook Kim , Srijan Kumar

Graph anomaly detection (GAD) aims to identify abnormal nodes that differ from the majority of the nodes in a graph, which has been attracting significant attention in recent years. Existing generalist graph models have achieved remarkable…

Machine Learning · Computer Science 2025-06-03 Hezhe Qiao , Chaoxi Niu , Ling Chen , Guansong Pang

Graph signal processing deals with algorithms and signal representations that leverage graph structures for multivariate data analysis. Often said graph topology is not readily available and may be time-varying, hence (dynamic) graph…

Signal Processing · Electrical Eng. & Systems 2024-09-20 Hector Chahuara , Gonzalo Mateos

Multivariate time series anomalies often manifest as shifts in cross-channel dependencies rather than simple amplitude excursions. In autonomous driving, for instance, a steering command might be internally consistent but decouple from the…

Machine Learning · Computer Science 2026-03-17 Kadir-Kaan Özer , René Ebeling , Markus Enzweiler

We develop graph-based methods for semi-supervised learning based on label propagation on a data similarity graph. When data is abundant or arrive in a stream, the problems of computation and data storage arise for any graph-based method.…

Machine Learning · Computer Science 2026-05-06 Michal Valko

Graph Anomaly Detection (GAD) is critical in security-sensitive domains, yet faces reliability challenges: miscalibrated confidence estimation (underconfidence in normal nodes, overconfidence in anomalies), adversarial vulnerability of…

Machine Learning · Computer Science 2025-04-04 Songran Bai , Xiaolong Zheng , Daniel Dajun Zeng

The ability to understand the surrounding scene is of paramount importance for Autonomous Vehicles (AVs). This paper presents a system capable to work in an online fashion, giving an immediate response to the arise of anomalies surrounding…

Computer Vision and Pattern Recognition · Computer Science 2025-06-19 Leonardo Rossi , Vittorio Bernuzzi , Tomaso Fontanini , Massimo Bertozzi , Andrea Prati

Multimodal Industrial Anomaly Detection (MIAD), which utilizes 3D point clouds and 2D RGB images to identify abnormal regions in products, plays a crucial role in industrial quality inspection. However, traditional MIAD settings assume that…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Bingchen Miao , Wenqiao Zhang , Juncheng Li , Wangyu Wu , Siliang Tang , Zhaocheng Li , Haochen Shi , Jun Xiao , Yueting Zhuang

Few-Shot Industrial Visual Anomaly Detection (FS-IVAD) comprises a critical task in modern manufacturing settings, where automated product inspection systems need to identify rare defects using only a handful of normal/defect-free training…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Aggelos Psiris , Yannis Panagakis , Maria Vakalopoulou , Georgios Th. Papadopoulos

As the default protocol for exchanging routing reachability information on the Internet, the abnormal behavior in traffic of Border Gateway Protocols (BGP) is closely related to Internet anomaly events. The BGP anomalous detection model…

Machine Learning · Computer Science 2021-12-28 Songtao Peng , Jiaqi Nie , Xincheng Shu , Zhongyuan Ruan , Lei Wang , Yunxuan Sheng , Qi Xuan

5G and Beyond Networks become increasingly complex and heterogeneous, with diversified and high requirements from a wide variety of emerging applications. The complexity and diversity of Telecom networks place an increasing strain on…

Machine Learning · Computer Science 2023-11-27 R. Bourgerie , T. Zanouda

Graph anomaly detection (GAD) has achieved success and has been widely applied in various domains, such as fraud detection, cybersecurity, finance security, and biochemistry. However, existing graph anomaly detection algorithms focus on…

Machine Learning · Computer Science 2023-08-03 Xing Ai , Jialong Zhou , Yulin Zhu , Gaolei Li , Tomasz P. Michalak , Xiapu Luo , Kai Zhou

Traffic forecasting is an important issue in intelligent traffic systems (ITS). Graph neural networks (GNNs) are effective deep learning models to capture the complex spatio-temporal dependency of traffic data, achieving ideal prediction…

Machine Learning · Computer Science 2023-05-03 Weiheng Zhong , Hadi Meidani , Jane Macfarlane

Anomaly detection (such as telecom fraud detection and medical image detection) has attracted the increasing attention of people. The complex interaction between multiple entities widely exists in the network, which can reflect specific…

Machine Learning · Computer Science 2024-06-10 Xu Yuan , Na Zhou , Shuo Yu , Huafei Huang , Zhikui Chen , Feng Xia

Detecting anomalies for dynamic graphs has drawn increasing attention due to their wide applications in social networks, e-commerce, and cybersecurity. Recent deep learning-based approaches have shown promising results over shallow methods.…

Machine Learning · Computer Science 2021-10-29 Yixin Liu , Shirui Pan , Yu Guang Wang , Fei Xiong , Liang Wang , Qingfeng Chen , Vincent CS Lee

Detecting anomalies in multivariate time series(MTS) data plays an important role in many domains. The abnormal values could indicate events, medical abnormalities,cyber-attacks, or faulty devices which if left undetected could lead to…

Machine Learning · Computer Science 2023-01-31 Usman Anjum , Samuel Lin , Justin Zhan

Anomaly detection of multi-temporal modal data in Wireless Sensor Network (WSN) can provide an important guarantee for reliable network operation. Existing anomaly detection methods in multi-temporal modal data scenarios have the problems…

Machine Learning · Computer Science 2026-01-21 Miao Ye , Jing Cui , Yuan huang , Qian He , Yong Wang , Jiwen Zhang

Existing foundation models, such as CLIP, aim to learn a unified embedding space for multimodal data, enabling a wide range of downstream web-based applications like search, recommendation, and content classification. However, these models…

Machine Learning · Computer Science 2025-04-28 Yufei He , Yuan Sui , Xiaoxin He , Yue Liu , Yifei Sun , Bryan Hooi