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Anomaly detection is critical in various fields, including intrusion detection, health monitoring, fault diagnosis, and sensor network event detection. The isolation forest (or iForest) approach is a well-known technique for detecting…

Machine Learning · Computer Science 2021-10-06 Seemandhar Jain , Prarthi Jain , Abhishek Srivastava

Humans do not acquire perceptual abilities in the way we train machines. While machine learning algorithms typically operate on large collections of randomly-chosen, explicitly-labeled examples, human acquisition relies more heavily on…

Deploying robust machine learning models has to account for concept drifts arising due to the dynamically changing and non-stationary nature of data. Addressing drifts is particularly imperative in the security domain due to the…

Cryptography and Security · Computer Science 2022-06-16 Aditya Kuppa , Nhien-An Le-Khac

Current fake audio detection algorithms have achieved promising performances on most datasets. However, their performance may be significantly degraded when dealing with audio of a different dataset. The orthogonal weight modification to…

Sound · Computer Science 2023-08-08 Xiaohui Zhang , Jiangyan Yi , Jianhua Tao , Chenglong Wang , Chuyuan Zhang

In this work, we propose a new, fast and scalable method for anomaly detection in large time-evolving graphs. It may be a static graph with dynamic node attributes (e.g. time-series), or a graph evolving in time, such as a temporal network.…

Social and Information Networks · Computer Science 2019-01-29 Volodymyr Miz , Benjamin Ricaud , Kirell Benzi , Pierre Vandergheynst

The detection of anomalies in non-stationary time-series streams is a critical but challenging task across numerous industrial and scientific domains. Traditional models, trained offline, suffer significant performance degradation when…

Machine Learning · Computer Science 2025-09-01 Ashok Devireddy , Shunping Huang

This paper introduces an unsupervised framework for detecting audio patterns in musical samples (loops) through anomaly detection techniques, addressing challenges in music information retrieval (MIR). Existing methods are often constrained…

Sound · Computer Science 2025-06-02 Shayan Dadman , Bernt Arild Bremdal , Børre Bang , Rune Dalmo

Concept drift and label scarcity are two critical challenges limiting the robustness of predictive models in dynamic industrial environments. Existing drift detection methods often assume global shifts and rely on dense supervision, making…

Machine Learning · Statistics 2025-11-05 Junghee Pyeon , Davide Cacciarelli , Kamran Paynabar

In this paper we make progress on the unsupervised task of mining arbitrarily shaped clusters in highly noisy datasets, which is a task present in many real-world applications. Based on the fundamental work that first applies a wavelet…

Databases · Computer Science 2019-01-08 Zengjian Chen , Jiayi Liu , Yihe Deng , Kun He , John E. Hopcroft

Recent years have witnessed an upsurge of interest in the problem of anomaly detection on attributed networks due to its importance in both research and practice. Although various approaches have been proposed to solve this problem, two…

Social and Information Networks · Computer Science 2022-12-16 Tianjin Huang , Yulong Pei , Vlado Menkovski , Mykola Pechenizkiy

Detection of anomalies among a large number of processes is a fundamental task that has been studied in multiple research areas, with diverse applications spanning from spectrum access to cyber-security. Anomalous events are characterized…

Information Theory · Computer Science 2022-08-12 Benjamin Wolff , Tomer Gafni , Guy Revach , Nir Shlezinger , Kobi Cohen

This paper addresses the challenges of complex dependencies and diverse anomaly patterns in cloud service environments by proposing a dependency modeling and anomaly detection method that integrates contrastive learning. The method…

Machine Learning · Computer Science 2025-10-16 Yue Xing , Yingnan Deng , Heyao Liu , Ming Wang , Yun Zi , Xiaoxuan Sun

Audio fingerprinting techniques have seen great advances in recent years, enabling accurate and fast audio retrieval even in conditions when the queried audio sample has been highly deteriorated or recorded in noisy conditions. Expectedly,…

Information Retrieval · Computer Science 2025-09-26 Kemal Altwlkany , Sead Delalić , Adis Alihodžić , Elmedin Selmanović , Damir Hasić

Audio-text retrieval enables semantic alignment between audio content and natural language queries, supporting applications in multimedia search, accessibility, and surveillance. However, current state-of-the-art approaches struggle with…

Computation and Language · Computer Science 2026-04-28 Meizhu Liu , Matthew Rowe , Amit Agarwal , Michael Avendi , Yassi Abbasi , Hitesh Laxmichand Patel , Paul Li , Kyu J. Han , Tao Sheng , Sujith Ravi , Dan Roth

The detection of anomalous sounds in machinery operation presents a significant challenge due to the difficulty in generalizing anomalous acoustic patterns. This task is typically approached as an unsupervised learning or novelty detection…

Audio and Speech Processing · Electrical Eng. & Systems 2024-10-30 Seunghyeon Shin , Seokjin Lee

Anomaly subsequence detection is to detect inconsistent data, which always contains important information, among time series. Due to the high dimensionality of the time series, traditional anomaly detection often requires a large time…

Machine Learning · Computer Science 2019-07-02 Chunkai Zhang , Yingyang Chen , Ao Yin

Open-vocabulary audio language models (ALMs), like Contrastive Language Audio Pretraining (CLAP), represent a promising new paradigm for audio-text retrieval using natural language queries. In this paper, for the first time, we perform…

The state-of-the-art approach for semi-supervised anomalous sound detection is to first learn an embedding space by using auxiliary classification tasks based on meta information or self-supervised learning and then estimate the…

Audio and Speech Processing · Electrical Eng. & Systems 2024-08-23 Kevin Wilkinghoff

Manual annotation of audio datasets is labour intensive, and it is challenging to balance label granularity with acoustic separability. We introduce AuditoryHuM, a novel framework for the unsupervised discovery and clustering of auditory…

Sound · Computer Science 2026-02-24 Henry Zhong , Jörg M. Buchholz , Julian Maclaren , Simon Carlile , Richard F. Lyon

Massive rumors usually appear along with breaking news or trending topics, seriously hindering the truth. Existing rumor detection methods are mostly focused on the same domain, and thus have poor performance in cross-domain scenarios due…

Social and Information Networks · Computer Science 2023-03-22 Hongyan Ran , Caiyan Jia
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