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An important task in network analysis is the detection of anomalous events in a network time series. These events could merely be times of interest in the network timeline or they could be examples of malicious activity or network…

Machine Learning · Computer Science 2016-08-03 Timothy La Fond , Jennifer Neville , Brian Gallagher

Time series anomaly detection is critical for maintaining the reliability of mission-critical systems. While Transformer-based models like PatchTST have shown remarkable performance, their $\mathcal{O}(L^2)$ computational complexity…

Machine Learning · Computer Science 2026-05-28 Tae-Gyun Lee , Junyoung Park , Kyu Won Han

Dynamic networks, also called network streams, are an important data representation that applies to many real-world domains. Many sets of network data such as e-mail networks, social networks, or internet traffic networks are best…

Social and Information Networks · Computer Science 2014-11-17 Timothy La Fond , Jennifer Neville , Brian Gallagher

Graph-level anomaly detection aims to identify abnormal graphs that exhibit deviant structures and node attributes compared to the majority in a graph set. One primary challenge is to learn normal patterns manifested in both fine-grained…

Machine Learning · Computer Science 2023-07-04 Chaoxi Niu , Guansong Pang , Ling Chen

Abnormal event detection (AED) in urban surveillance videos has multiple challenges. Unlike other computer vision problems, the AED is not solely dependent on the content of frames. It also depends on the appearance of the objects and their…

Computer Vision and Pattern Recognition · Computer Science 2020-11-20 Ali Atghaei , Soroush Ziaeinejad , Mohammad Rahmati

Accuracy anomaly detection in user-level network traffic is crucial for network security. Compared with existing models that passively detect specific anomaly classes with large labeled training samples, user-level network traffic contains…

Cryptography and Security · Computer Science 2025-01-16 Tongtong Feng , Qi Qi , Lingqi Guo , Jingyu Wang

Recently, several techniques have been explored to detect unusual behaviour in surveillance videos. Nevertheless, few studies leverage features from pre-trained CNNs and none of then present a comparison of features generate by different…

Computer Vision and Pattern Recognition · Computer Science 2018-11-22 Tiago S. Nazare , Rodrigo F. de Mello , Moacir A. Ponti

Anomaly detection is referred to as a process in which the aim is to detect data points that follow a different pattern from the majority of data points. Anomaly detection methods suffer from several well-known challenges that hinder their…

Machine Learning · Computer Science 2021-08-31 Kasra Babaei , Zhi Yuan Chen , Tomas Maul

Anomaly detection on the attributed network has recently received increasing attention in many research fields, such as cybernetic anomaly detection and financial fraud detection. With the wide application of deep learning on graph…

Social and Information Networks · Computer Science 2022-09-13 Yuanjun Shi

The problem of detecting anomalies in time series from network measurements has been widely studied and is a topic of fundamental importance. Many anomaly detection methods are based on packet inspection collected at the network core…

Networking and Internet Architecture · Computer Science 2020-04-22 Ananda Streit , Gustavo H. A. Santos , Rosa Leão , Edmundo de Souza e Silva , Daniel Menasché , Don Towsley

With the widespread deployment of video surveillance devices and the demand for intelligent system development, video anomaly detection (VAD) has become an important part of constructing intelligent surveillance systems. Expanding the…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Jiahao Lyu , Minghua Zhao , Jing Hu , Runtao Xi , Xuewen Huang , Shuangli Du , Cheng Shi , Tian Ma

Kubernetes, in recent years, has become widely used for the deployment and management of software projects on cloud infrastructure. Due to the execution of these applications across numerous Nodes, each one with its unique specifications,…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-03-19 V. Anemogiannis , B. Andreou , K. Myrtollari , K. Panagidi , S. Hadjiefthymiades

Anomaly detection significantly enhances the robustness of cloud systems. While neural network-based methods have recently demonstrated strong advantages, they encounter practical challenges in cloud environments: the contradiction between…

Machine Learning · Computer Science 2024-03-20 Feiyi Chen , Yingying zhang , Zhen Qin , Lunting Fan , Renhe Jiang , Yuxuan Liang , Qingsong Wen , Shuiguang Deng

Recently, there has been a substantial amount of interest in GNN-based anomaly detection. Existing efforts have focused on simultaneously mastering the node representations and the classifier necessary for identifying abnormalities with…

Cryptography and Security · Computer Science 2024-09-25 Ahmad Hafez

Cycling is a promising sustainable mode for commuting and leisure in cities, however, the fear of getting hit or fall reduces its wide expansion as a commuting mode. In this paper, we introduce a novel method called CyclingNet for detecting…

Computer Vision and Pattern Recognition · Computer Science 2021-02-02 Mohamed R. Ibrahim , James Haworth , Nicola Christie , Tao Cheng

Despite inherent ill-definition, anomaly detection is a research endeavor of great interest within machine learning and visual scene understanding alike. Most commonly, anomaly detection is considered as the detection of outliers within a…

Computer Vision and Pattern Recognition · Computer Science 2019-05-03 Samet Akçay , Amir Atapour-Abarghouei , Toby P. Breckon

Anomaly detection (AD) in a surveillance scenario is an emerging and challenging field of research. For autonomous vehicles like drones or cars, it is immensely important to distinguish between normal and abnormal states in real-time.…

Computer Vision and Pattern Recognition · Computer Science 2020-07-15 Sayeed Shafayet Chowdhury , Kazi Mejbaul Islam , Rouhan Noor

Most current clustering based anomaly detection methods use scoring schema and thresholds to classify anomalies. These methods are often tailored to target specific data sets with "known" number of clusters. The paper provides a streaming…

Machine Learning · Statistics 2019-11-04 Sreelekha Guggilam , Syed M. A. Zaidi , Varun Chandola , Abani K. Patra

This paper describes the use of neural networks to enhance simulations for subsequent training of anomaly-detection systems. Simulations can provide edge conditions for anomaly detection which may be sparse or non-existent in real-world…

Neural and Evolutionary Computing · Computer Science 2020-11-06 Philip Feldman

Progress in video anomaly detection research is currently slowed by small datasets that lack a wide variety of activities as well as flawed evaluation criteria. This paper aims to help move this research effort forward by introducing a…

Computer Vision and Pattern Recognition · Computer Science 2020-01-27 Bharathkumar Ramachandra , Michael Jones