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In recent years, graph anomaly detection has found extensive applications in various domains such as social, financial, and communication networks. However, anomalies in graph-structured data present unique challenges, including label…

机器学习 · 计算机科学 2025-06-05 Yuxuan Cao , Jiarong Xu , Chen Zhao , Jiaan Wang , Carl Yang , Chunping Wang , Yang Yang

Unsupervised multivariate time series anomaly detection (UMTSAD) plays a critical role in various domains, including finance, networks, and sensor systems. In recent years, due to the outstanding performance of deep learning in general…

机器学习 · 计算机科学 2025-04-28 Tiange Huang , Yongjun Li

To build safe and reliable graph machine learning systems, unsupervised graph-level anomaly detection (GLAD) and unsupervised graph-level out-of-distribution (OOD) detection (GLOD) have received significant attention in recent years. Though…

机器学习 · 计算机科学 2025-04-07 Yili Wang , Yixin Liu , Xu Shen , Chenyu Li , Kaize Ding , Rui Miao , Ying Wang , Shirui Pan , Xin Wang

This paper considers an important Graph Anomaly Detection (GAD) task, namely open-set GAD, which aims to train a detection model using a small number of normal and anomaly nodes (referred to as seen anomalies) to detect both seen anomalies…

机器学习 · 计算机科学 2025-06-23 Qizhou Wang , Guansong Pang , Mahsa Salehi , Xiaokun Xia , Christopher Leckie

The natural combination of intricate topological structures and rich textual information in text-attributed graphs (TAGs) opens up a novel perspective for graph anomaly detection (GAD). However, existing GAD methods primarily focus on…

机器学习 · 计算机科学 2025-08-04 Yiming Xu , Jiarun Chen , Zhen Peng , Zihan Chen , Qika Lin , Lan Ma , Bin Shi , Bo Dong

Multivariate time series (MTS) data collected from multiple sensors provide the potential for accurate abnormal activity detection in smart healthcare scenarios. However, anomalies exhibit diverse patterns and become unnoticeable in MTS…

机器学习 · 计算机科学 2023-09-13 Mengjia Niu , Yuchen Zhao , Hamed Haddadi

Detecting failures and identifying their root causes promptly and accurately is crucial for ensuring the availability of microservice systems. A typical failure troubleshooting pipeline for microservices consists of two phases: anomaly…

软件工程 · 计算机科学 2024-05-16 Luan Pham , Huong Ha , Hongyu Zhang

Quantum-inspired tensor networks algorithms have shown to be effective and efficient models for machine learning tasks, including anomaly detection. Here, we propose a highly parallelizable quantum-inspired approach which we call SMT-AD…

机器学习 · 计算机科学 2026-04-09 Apimuk Sornsaeng , Si Min Chan , Wenxuan Zhang , Swee Liang Wong , Joshua Lim , Dario Poletti

Root cause analysis (RCA) in microservice systems is challenging, requiring on-call engineers to rapidly diagnose failures across heterogeneous telemetry such as metrics, logs, and traces. Traditional RCA methods often focus on single…

人工智能 · 计算机科学 2025-08-19 Yifang Tian , Yaming Liu , Zichun Chong , Zihang Huang , Hans-Arno Jacobsen

Multivariate time-series anomaly detection is essential for reliable industrial control, telemetry, and service monitoring. However, the evolving inter-variable dependencies and inevitable noise render it challenging. Existing methods often…

机器学习 · 计算机科学 2026-02-25 Zhongpeng Qi , Jun Zhang , Wei Li , Zhuoxuan Liang

The number of end devices that use the last mile wireless connectivity is dramatically increasing with the rise of smart infrastructures and require reliable functioning to support smooth and efficient business processes. To efficiently…

机器学习 · 计算机科学 2022-02-21 Blaž Bertalanič , Marko Meža , Carolina Fortuna

Detecting anomalies is important for identifying inefficiencies, errors, or fraud in business processes. Traditional process mining approaches focus on analyzing 'flattened', sequential, event logs based on a single case notion. However,…

统计金融 · 定量金融 2024-03-05 Alessandro Niro , Michael Werner

Anomaly detection (AD) is the identification of data samples that do not fit a learned data distribution. As such, AD systems can help physicians to determine the presence, severity, and extension of a pathology. Deep generative models,…

图像与视频处理 · 电气工程与系统科学 2021-04-12 Jaime Simarro , Ezequiel de la Rosa , Thijs Vande Vyvere , David Robben , Diana M. Sima

The increasing demand for robust security solutions across various industries has made Video Anomaly Detection (VAD) a critical task in applications such as intelligent surveillance, evidence investigation, and violence detection.…

机器学习 · 计算机科学 2025-01-15 Sanggeon Yun , Ryozo Masukawa , William Youngwoo Chung , Minhyoung Na , Nathaniel Bastian , Mohsen Imani

Anomalies and outliers are common in real-world data, and they can arise from many sources, such as sensor faults. Accordingly, anomaly detection is important both for analyzing the anomalies themselves and for cleaning the data for further…

机器学习 · 统计学 2018-11-13 Haitao Liu , Randy C. Paffenroth , Jian Zou , Chong Zhou

Anomaly detection algorithms are often thought to be limited because they don't facilitate the process of validating results performed by domain experts. In Contrast, deep learning algorithms for anomaly detection, such as autoencoders,…

机器学习 · 计算机科学 2020-07-02 Liat Antwarg , Ronnie Mindlin Miller , Bracha Shapira , Lior Rokach

Graph anomaly detection (GAD), which aims to detect outliers in graph-structured data, has received increasing research attention recently. However, existing GAD methods assume identical training and testing distributions, which is rarely…

机器学习 · 计算机科学 2025-11-11 Junjun Pan , Yixin Liu , Chuan Zhou , Fei Xiong , Alan Wee-Chung Liew , Shirui Pan

Uncovering anomalies in attributed networks has recently gained popularity due to its importance in unveiling outliers and flagging adversarial behavior in a gamut of data and network science applications including {the Internet of Things…

社会与信息网络 · 计算机科学 2021-04-20 Konstantinos D. Polyzos , Costas Mavromatis , Vassilis N. Ioannidis , Georgios B. Giannakis

Robust anomaly detection is a requirement for monitoring complex modern systems with applications such as cyber-security, fraud prevention, and maintenance. These systems generate multiple correlated time series that are highly seasonal and…

机器学习 · 计算机科学 2019-11-19 Farzaneh Khoshnevisan , Zhewen Fan

Cloud-Native microservice architectures have become prevalent owing to their inherent flexibility and scalability properties. To satisfy service quality guarantees, cloud providers must implement efficient proactive autoscaling algorithms.…

分布式、并行与集群计算 · 计算机科学 2026-04-21 Zhichao Sun , Hailiang Zhao , Kingsum Chow
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