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Multivariate time-series anomaly detection is critically important in many applications, including retail, transportation, power grid, and water treatment plants. Existing approaches for this problem mostly employ either statistical models…

Machine Learning · Computer Science 2023-11-17 Yu Zheng , Huan Yee Koh , Ming Jin , Lianhua Chi , Khoa T. Phan , Shirui Pan , Yi-Ping Phoebe Chen , Wei Xiang

Anomaly detection on time series data is increasingly common across various industrial domains that monitor metrics in order to prevent potential accidents and economic losses. However, a scarcity of labeled data and ambiguous definitions…

Machine Learning · Computer Science 2022-12-29 Lawrence Wong , Dongyu Liu , Laure Berti-Equille , Sarah Alnegheimish , Kalyan Veeramachaneni

In this paper, we investigate algorithms for anomaly detection. Previous anomaly detection methods focus on modeling the distribution of non-anomalous data provided during training. However, this does not necessarily ensure the correct…

Machine Learning · Computer Science 2020-05-29 Ziyi Yang , Iman Soltani Bozchalooi , Eric Darve

The use of Dynamic Random Access Memory (DRAM) for storing Machine Learning (ML) models plays a critical role in accelerating ML inference tasks in the next generation of communication systems. However, periodic refreshment of DRAM results…

Networking and Internet Architecture · Computer Science 2025-10-31 Junya Shiraishi , Shashi Raj Pandey , Israel Leyva-Mayorga , Petar Popovski

The Advanced Metering Infrastructure (AMI) is one of the key components of the smart grid. It provides interactive services for managing billing and electricity consumption, but it also introduces new vectors for cyberattacks. Although, the…

Cryptography and Security · Computer Science 2024-07-04 Abdelaziz Amara Korba , Nouredine Tamani , Yacine Ghamri-Doudane , Nour El Islem karabadji

A novel approach to detecting anomalies in time series data is presented in this paper. This approach is pivotal in domains such as data centers, sensor networks, and finance. Traditional methods often struggle with manual parameter tuning…

Machine Learning · Computer Science 2025-04-07 Bahareh Golchin , Banafsheh Rekabdar

In recent years, some researchers have applied diffusion models to multivariate time series anomaly detection. The partial diffusion strategy, which depends on the diffusion steps, is commonly used for anomaly detection in these models.…

Machine Learning · Computer Science 2025-01-06 Guangqiang Wu , Fu Zhang

Increasing the semantic understanding and contextual awareness of machine learning models is important for improving robustness and reducing susceptibility to data shifts. In this work, we leverage contextual awareness for the anomaly…

Machine Learning · Computer Science 2022-03-22 Nathan Vaska , Kevin Leahy , Victoria Helus

The prevalence of networked sensors and actuators in many real-world systems such as smart buildings, factories, power plants, and data centers generate substantial amounts of multivariate time series data for these systems. The rich sensor…

Machine Learning · Computer Science 2019-01-17 Dan Li , Dacheng Chen , Lei Shi , Baihong Jin , Jonathan Goh , See-Kiong Ng

Resource allocation and multiple access schemes are instrumental for the success of communication networks, which facilitate seamless wireless connectivity among a growing population of uncoordinated and non-synchronized users. In this…

Signal Processing · Electrical Eng. & Systems 2023-06-22 Sajad Daei , Saeed Razavikia , Marios Kountouris , Mikael Skoglund , Gabor Fodor , Carlo Fischione

Classical anomaly detection is principally concerned with point-based anomalies, those anomalies that occur at a single point in time. Yet, many real-world anomalies are range-based, meaning they occur over a period of time. Motivated by…

Machine Learning · Computer Science 2019-01-04 Nesime Tatbul , Tae Jun Lee , Stan Zdonik , Mejbah Alam , Justin Gottschlich

Water distribution networks are a key component of modern infrastructure for housing and industry. They transport and distribute water via widely branched networks from sources to consumers. In order to guarantee a working network at all…

Machine Learning · Computer Science 2022-04-05 Jonathan Jakob , André Artelt , Martina Hasenjäger , Barbara Hammer

Indoor localization becomes a raising demand in our daily lives. Due to the massive deployment in the indoor environment nowadays, WiFi systems have been applied to high accurate localization recently. Although the traditional model based…

Signal Processing · Electrical Eng. & Systems 2019-02-19 Chenlu Xiang , Zhichao Zhang , Shunqing Zhang , Shugong Xu , Shan Cao , Vincent LAU

Time series anomaly detection is usually formulated as finding outlier data points relative to some usual data, which is also an important problem in industry and academia. To ensure systems working stably, internet companies, banks and…

Machine Learning · Computer Science 2018-12-24 Zhang Rong , Dong Shandong , Nie Xin , Xiao Shiguang

Wireless Sensor Networks (WSN) are the backbone of essential monitoring applications, but their deployment in unfavourable conditions increases the risk to data integrity and system reliability. Traditional fault detection methods often…

Networking and Internet Architecture · Computer Science 2026-05-06 Nguyen Tri Nghia , Nguyen Van Son , Nguyen Thi Hanh

Anomaly detection in multivariate time series is an important problem across various fields such as healthcare, financial services, manufacturing or physics detector monitoring. Accurately identifying when unexpected errors or faults occur…

Machine Learning · Computer Science 2025-06-26 Laura Boggia , Rafael Teixeira de Lima , Bogdan Malaescu

Device mobility in dense Wi-Fi networks offers several challenges. Two well-known problems related to device mobility are handover prediction and access point selection. Due to the complex nature of the radio environment, analytical models…

Networking and Internet Architecture · Computer Science 2022-05-31 Muhammad Asif Khan , Ridha Hamila , Adel Gastli , Serkan Kiranyaz , Nasser Ahmed Al-Emadi

The massive amount of data available in operational mobile networks offers an invaluable opportunity for operators to detect and analyze possible anomalies and predict network performance. In particular, application of advanced machine…

Networking and Internet Architecture · Computer Science 2020-12-01 Jessica Moysen , Furqan Ahmed , Mario García-Lozano , Jarno Niemelä

Wireless networks are increasingly facing challenges due to their expanding scale and complexity. These challenges underscore the need for advanced AI-driven strategies, particularly in the upcoming 6G networks. In this article, we…

Networking and Internet Architecture · Computer Science 2024-09-13 Jingwen Tong , Jiawei Shao , Qiong Wu , Wei Guo , Zijian Li , Zehong Lin , Jun Zhang

Errors are prevalent in time series data, such as GPS trajectories or sensor readings. Existing methods focus more on anomaly detection but not on repairing the detected anomalies. By simply filtering out the dirty data via anomaly…

Databases · Computer Science 2020-03-30 Aoqian Zhang , Shaoxu Song , Jianmin Wang , Philip S. Yu