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In this paper we present a new classification model in machine learning. Our result is threefold: 1) The model produces comparable predictive accuracy to that of most common classification models. 2) It runs significantly faster than most…

机器学习 · 统计学 2022-08-18 Ko-Hui Michael Fan , Chih-Chung Chang , Kuang-Hsiao-Yin Kongguoluo

This work considers a practical semi-supervised graph anomaly detection (GAD) scenario, where part of the nodes in a graph are known to be normal, contrasting to the extensively explored unsupervised setting with a fully unlabeled graph. We…

机器学习 · 计算机科学 2024-12-20 Hezhe Qiao , Qingsong Wen , Xiaoli Li , Ee-Peng Lim , Guansong Pang

Anomaly detection is being regarded as an unsupervised learning task as anomalies stem from adversarial or unlikely events with unknown distributions. However, the predictive performance of purely unsupervised anomaly detection often fails…

机器学习 · 计算机科学 2014-01-27 Nico Goernitz , Marius Micha Kloft , Konrad Rieck , Ulf Brefeld

In recent years, deep learning technology has been maturely applied in the field of object detection, and most algorithms tend to be supervised learning. However, a large amount of labeled data requires high costs of human resources, which…

计算机视觉与模式识别 · 计算机科学 2023-06-27 Yanyang Wang , Zhaoxiang Liu , Shiguo Lian

Anomaly detection is a challenging task that frequently arises in practically all areas of industry and science, from fraud detection and data quality monitoring to finding rare cases of diseases and searching for new physics. Most of the…

机器学习 · 计算机科学 2021-11-22 Artem Ryzhikov , Maxim Borisyak , Andrey Ustyuzhanin , Denis Derkach

To improve logical anomaly detection, some previous works have integrated segmentation techniques with conventional anomaly detection methods. Although these methods are effective, they frequently lead to unsatisfactory segmentation results…

计算机视觉与模式识别 · 计算机科学 2024-09-04 Yu-Hsuan Hsieh , Shang-Hong Lai

We study the problem of semi-supervised anomaly detection with domain adaptation. Given a set of normal data from a source domain and a limited amount of normal examples from a target domain, the goal is to have a well-performing anomaly…

机器学习 · 计算机科学 2020-06-09 Ziyi Yang , Iman Soltani Bozchalooi , Eric Darve

Semi-supervised object detection (SSOD) aims to improve the performance and generalization of existing object detectors by utilizing limited labeled data and extensive unlabeled data. Despite many advances, recent SSOD methods are still…

计算机视觉与模式识别 · 计算机科学 2023-10-30 Seyed Mojtaba Marvasti-Zadeh , Nilanjan Ray , Nadir Erbilgin

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…

机器学习 · 计算机科学 2023-01-31 Usman Anjum , Samuel Lin , Justin Zhan

Anomaly detection is essential for identifying rare and significant events across diverse domains such as finance, cybersecurity, and network monitoring. This paper presents Synthetic Anomaly Monitoring (SAM), an innovative approach that…

机器学习 · 计算机科学 2025-02-04 Emanuele Luzio , Moacir Antonelli Ponti

Open-set semi-supervised object detection (OSSOD) task leverages practical open-set unlabeled datasets that comprise both in-distribution (ID) and out-of-distribution (OOD) instances for conducting semi-supervised object detection (SSOD).…

计算机视觉与模式识别 · 计算机科学 2024-03-25 Zerun Wang , Ling Xiao , Liuyu Xiang , Zhaotian Weng , Toshihiko Yamasaki

We introduce a new semi-supervised, time series anomaly detection algorithm that uses deep reinforcement learning (DRL) and active learning to efficiently learn and adapt to anomalies in real-world time series data. Our model - called RLAD…

机器学习 · 计算机科学 2021-04-02 Tong Wu , Jorge Ortiz

The aim of this paper is to formalise the task of continual semi-supervised anomaly detection (CSAD), with the aim of highlighting the importance of such a problem formulation which assumes as close to real-world conditions as possible.…

机器学习 · 计算机科学 2024-12-03 Jack Belham , Aryan Bhosale , Samrat Mukherjee , Biplab Banerjee , Fabio Cuzzolin

Noise-inclusive fully unsupervised anomaly detection (FUAD) holds significant practical relevance. Although various methods exist to address this problem, they are limited in both performance and scalability. Our work seeks to overcome…

图像与视频处理 · 电气工程与系统科学 2025-06-19 Chengming Liu , Fengjie Wang , Lei Shi , Zhe Zhao

Semi-supervised object detection (SSOD) based on pseudo-labeling significantly reduces dependence on large labeled datasets by effectively leveraging both labeled and unlabeled data. However, real-world applications of SSOD often face…

计算机视觉与模式识别 · 计算机科学 2025-03-25 Moussa Kassem Sbeyti , Nadja Klein , Azarm Nowzad , Fikret Sivrikaya , Sahin Albayrak

Anomaly detection aims to distinguish abnormal instances that deviate significantly from the majority of benign ones. As instances that appear in the real world are naturally connected and can be represented with graphs, graph neural…

Semi-supervised learning (SSL) constructs classifiers from datasets in which only a subset of observations is labelled, a situation that naturally arises because obtaining labels often requires expert judgement or costly manual effort. This…

统计计算 · 统计学 2025-12-09 Geoffrey J. McLachlan , Jinran Wu

The unlabeled data are generally assumed to be normal data in detecting abnormal data via semisupervised learning. This assumption, however, causes inevitable detection error when distribution of unlabeled data is different from…

机器学习 · 计算机科学 2022-03-29 Chong Hyun Lee , Kibae Lee

Learning in data-scarce settings has recently gained significant attention in the research community. Semi-supervised object detection(SSOD) aims to improve detection performance by leveraging a large number of unlabeled images alongside a…

计算机视觉与模式识别 · 计算机科学 2026-01-30 Chaoxin Wang , Bharaneeshwar Balasubramaniyam , Anurag Sangem , Nicolais Guevara , Doina Caragea

The paper introduces Supervised Embedding and Clustering Anomaly Detection (SEMC-AD), a method designed to efficiently identify faulty alarm logs in a mobile network and alleviate the challenges of manual monitoring caused by the growing…

机器学习 · 计算机科学 2023-10-11 R. Mosayebi , H. Kia , A. Kianpour Raki