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Graph anomaly detection is a popular and vital task in various real-world scenarios, which has been studied for several decades. Recently, many studies extending deep learning-based methods have shown preferable performance on graph anomaly…

机器学习 · 计算机科学 2025-05-13 Jing Ren , Mingliang Hou , Zhixuan Liu , Xiaomei Bai

A deep learning approach is proposed to detect data and system anomalies using high-resolution continuous point-on-wave (CPOW) or phasor measurements. Both the anomaly and anomaly-free measurement models are assumed to have unknown temporal…

系统与控制 · 电气工程与系统科学 2021-06-24 Kursat Rasim Mestav , Xinyi Wang , Lang Tong

Open-set supervised anomaly detection (OSAD) - a recently emerging anomaly detection area - aims at utilizing a few samples of anomaly classes seen during training to detect unseen anomalies (i.e., samples from open-set anomaly classes),…

计算机视觉与模式识别 · 计算机科学 2024-03-19 Jiawen Zhu , Choubo Ding , Yu Tian , Guansong Pang

Anomaly detection in imbalanced datasets is a frequent and crucial problem, especially in the medical domain where retrieving and labeling irregularities is often expensive. By combining the generative stability of a $\beta$-variational…

机器学习 · 计算机科学 2023-10-30 Fiete Lüer , Tobias Weber , Maxim Dolgich , Christian Böhm

The rapid expansion of data from diverse sources has made anomaly detection (AD) increasingly essential for identifying unexpected observations that may signal system failures, security breaches, or fraud. As datasets become more complex…

机器学习 · 计算机科学 2025-03-18 Haoqi Huang , Ping Wang , Jianhua Pei , Jiacheng Wang , Shahen Alexanian , Dusit Niyato

In this paper, we introduce a discrete variant of the meta-learning framework. Meta-learning aims at exploiting prior experience and data to improve performance on future tasks. By now, there exist numerous formulations for meta-learning in…

机器学习 · 计算机科学 2021-01-12 Arman Adibi , Aryan Mokhtari , Hamed Hassani

Meta learning is a promising technique for solving few-shot fault prediction problems, which have attracted the attention of many researchers in recent years. Existing meta-learning methods for time series prediction, which predominantly…

机器学习 · 计算机科学 2023-11-07 Hai Su , Jiajun Hu , Songsen Yu

Performing anomaly detection in hybrid systems is a challenging task since it requires analysis of timing behavior and mutual dependencies of both discrete and continuous signals. Typically, it requires modeling system behavior, which is…

机器学习 · 计算机科学 2020-10-30 Nemanja Hranisavljevic , Oliver Niggemann , Alexander Maier

Most current methods for detecting anomalies in text concentrate on constructing models solely relying on unlabeled data. These models operate on the presumption that no labeled anomalous examples are available, which prevents them from…

机器学习 · 计算机科学 2023-08-24 Anindya Sundar Das , Aravind Ajay , Sriparna Saha , Monowar Bhuyan

With a growing number of robots being deployed across diverse applications, robust multimodal anomaly detection becomes increasingly important. In robotic manipulation, failures typically arise from (1) robot-driven anomalies due to an…

机器人学 · 计算机科学 2025-06-25 Christoph Willibald , Daniel Sliwowski , Dongheui Lee

Anomaly detection (AD) is often focused on detecting anomaly areas for industrial quality inspection and medical lesion examination. However, due to the specific scenario targets, the data scale for AD is relatively small, and evaluation…

计算机视觉与模式识别 · 计算机科学 2024-04-17 Jiangning Zhang , Chengjie Wang , Xiangtai Li , Guanzhong Tian , Zhucun Xue , Yong Liu , Guansong Pang , Dacheng Tao

Remote sensing anomaly detector can find the objects deviating from the background as potential targets for Earth monitoring. Given the diversity in earth anomaly types, designing a transferring model with cross-modality detection ability…

计算机视觉与模式识别 · 计算机科学 2024-09-11 Jingtao Li , Xinyu Wang , Hengwei Zhao , Liangpei Zhang , Yanfei Zhong

Deep approaches to anomaly detection have recently shown promising results over shallow methods on large and complex datasets. Typically anomaly detection is treated as an unsupervised learning problem. In practice however, one may…

This study presents an adversarial method for anomaly detection in real-world applications, leveraging the power of generative adversarial neural networks (GANs) through cycle consistency in reconstruction error. Previous methods suffer…

机器学习 · 计算机科学 2024-05-01 Zahra Dehghanian , Saeed Saravani , Maryam Amirmazlaghani , Mohammad Rahmati

In one-class-learning tasks, only the normal case (foreground) can be modeled with data, whereas the variation of all possible anomalies is too erratic to be described by samples. Thus, due to the lack of representative data, the…

计算机视觉与模式识别 · 计算机科学 2019-06-03 Duc Tam Nguyen , Zhongyu Lou , Michael Klar , Thomas Brox

Most existing anomaly detection (AD) methods require a dedicated model for each category. Such a paradigm, despite its promising results, is computationally expensive and inefficient, thereby failing to meet the requirements for realworld…

计算机视觉与模式识别 · 计算机科学 2024-10-10 Chaoqin Huang , Haoyan Guan , Aofan Jiang , Ya Zhang , Michael Spratling , Xinchao Wang , Yanfeng Wang

Analyzing the distribution shift of data is a growing research direction in nowadays Machine Learning (ML), leading to emerging new benchmarks that focus on providing a suitable scenario for studying the generalization properties of ML…

机器学习 · 计算机科学 2023-04-04 Marius Dragoi , Elena Burceanu , Emanuela Haller , Andrei Manolache , Florin Brad

Detecting anomalies in large complex systems is a critical and challenging task. The difficulties arise from several aspects. First, collecting ground truth labels or prior knowledge for anomalies is hard in real-world systems, which often…

机器学习 · 计算机科学 2021-06-01 Huiling Qin , Xianyuan Zhan , Yu Zheng

With the rise of generative models, there is a growing interest in unifying all tasks within a generative framework. Anomaly detection methods also fall into this scope and utilize diffusion models to generate or reconstruct normal samples…

计算机视觉与模式识别 · 计算机科学 2025-07-23 Xiaofan Li , Xin Tan , Zhuo Chen , Zhizhong Zhang , Ruixin Zhang , Rizen Guo , Guannan Jiang , Yulong Chen , Yanyun Qu , Lizhuang Ma , Yuan Xie

Anomaly detection from graph data has drawn much attention due to its practical significance in many critical applications including cybersecurity, finance, and social networks. Existing data mining and machine learning methods are either…

机器学习 · 计算机科学 2022-01-25 Yu Zheng , Ming Jin , Yixin Liu , Lianhua Chi , Khoa T. Phan , Yi-Ping Phoebe Chen