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Anomaly detection on multivariate time-series is of great importance in both data mining research and industrial applications. Recent approaches have achieved significant progress in this topic, but there is remaining limitations. One major…

机器学习 · 计算机科学 2020-09-07 Hang Zhao , Yujing Wang , Juanyong Duan , Congrui Huang , Defu Cao , Yunhai Tong , Bixiong Xu , Jing Bai , Jie Tong , Qi Zhang

Anomaly detection has been a challenging task given high-dimensional multivariate time series data generated by networked sensors and actuators in Cyber-Physical Systems (CPS). Besides the highly nonlinear, complex, and dynamic natures of…

机器学习 · 计算机科学 2021-08-31 Kai Zhang , Yushan Jiang , Lee Seversky , Chengtao Xu , Dahai Liu , Houbing Song

Semiconductor manufacturing is an extremely complex process, characterized by thousands of interdependent parameters collected across diverse tools and process steps. Multi-variate time-series (MTS) analysis has emerged as a critical…

机器学习 · 计算机科学 2025-07-04 Bappaditya Dey , Daniel Sorensen , Minjin Hwang , Sandip Halder

Tabular anomaly detection is often handled by single detectors or static ensembles, even though strong performance on tabular data typically comes from heterogeneous model families (e.g., tree ensembles, deep tabular networks, and tabular…

机器学习 · 计算机科学 2026-02-17 Pinqiao Wang , Sheng Li

We present a unified experiment, analysis, and benchmark study of multivariate time-series (MTS) anomaly detection. Ten family-representative detectors -- spanning statistical, reconstruction, association, frequency, and generic-transformer…

机器学习 · 计算机科学 2026-05-28 Junhao Wei , Yanxiao Li , Bidong Chen , Yifu Zhao , Haochen Li , Dexing Yao , Baili Lu , Xudong Ye , Jietian Feng , Sio-Kei Im , Yapeng Wang , Xu Yang

Anomaly detection (AD) plays a crucial role in time series applications, primarily because time series data is employed across real-world scenarios. Detecting anomalies poses significant challenges since anomalies take diverse forms making…

机器学习 · 计算机科学 2025-01-03 Jihan Ghanim , Mariette Awad

Organizations rely heavily on time series metrics to measure and model key aspects of operational and business performance. The ability to reliably detect issues with these metrics is imperative to identifying early indicators of major…

机器学习 · 计算机科学 2020-11-11 Sayan Chakraborty , Smit Shah , Kiumars Soltani , Anna Swigart , Luyao Yang , Kyle Buckingham

3D Anomaly Detection (AD) is a promising means of controlling the quality of manufactured products. However, existing methods typically require carefully training a task-specific model for each category independently, leading to high cost,…

计算机视觉与模式识别 · 计算机科学 2026-01-21 Jiayi Cheng , Can Gao , Jie Zhou , Jiajun Wen , Tao Dai , Jinbao Wang

The widespread adoption of digital services, along with the scale and complexity at which they operate, has made incidents in IT operations increasingly more likely, diverse, and impactful. This has led to the rapid development of a central…

机器学习 · 计算机科学 2025-04-01 Vincent Jacob , Yanlei Diao

Evaluating anomaly detection in multivariate time series (MTS) requires careful consideration of temporal dependencies, particularly when detecting subsequence anomalies common in fault detection scenarios. While time series…

机器学习 · 统计学 2025-06-17 Steven C. Hespeler , Pablo Moriano , Mingyan Li , Samuel C. Hollifield

Fault diagnosis in multimode processes plays a critical role in ensuring the safe operation of industrial systems across multiple modes. It faces a great challenge yet to be addressed - that is, the significant distributional differences…

机器学习 · 计算机科学 2025-07-24 Guangqiang Li , M. Amine Atoui , Xiangshun Li

Deep generative models are promising in detecting novel cyber-physical attacks, mitigating the vulnerability of Cyber-physical systems (CPSs) without relying on labeled information. Nonetheless, these generative models face challenges in…

密码学与安全 · 计算机科学 2023-11-07 Haili Sun , Yan Huang , Lansheng Han , Cai Fu , Hongle Liu , Xiang Long

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…

机器学习 · 计算机科学 2025-06-26 Laura Boggia , Rafael Teixeira de Lima , Bogdan Malaescu

Multivariate Time Series (MTS) analysis is crucial to understanding and managing complex systems, such as traffic and energy systems, and a variety of approaches to MTS forecasting have been proposed recently. However, we often observe…

Mainstream unsupervised anomaly detection algorithms often excel in academic datasets, yet their real-world performance is restricted due to the controlled experimental conditions involving clean training data. Addressing the challenge of…

机器学习 · 计算机科学 2025-05-13 Thi Kieu Khanh Ho , Narges Armanfard

Anomaly detection is a critical requirement for ensuring safety in autonomous driving. In this work, we leverage Cooperative Perception to share information across nearby vehicles, enabling more accurate identification and consensus of…

多智能体系统 · 计算机科学 2025-01-30 Ashish Bastola , Hao Wang , Abolfazl Razi

For anomaly detection (AD), early approaches often train separate models for individual classes, yielding high performance but posing challenges in scalability and resource management. Recent efforts have shifted toward training a single…

计算机视觉与模式识别 · 计算机科学 2025-07-18 Lei Fan , Junjie Huang , Donglin Di , Anyang Su , Tianyou Song , Maurice Pagnucco , Yang Song

This study proposes an anomaly detection method based on the Transformer architecture with integrated multiscale feature perception, aiming to address the limitations of temporal modeling and scale-aware feature representation in cloud…

机器学习 · 计算机科学 2025-08-26 Lian Lian , Yilin Li , Song Han , Renzi Meng , Sibo Wang , Ming Wang

Multivariate Time Series Anomaly Detection (MTSAD) is critical for real-world monitoring scenarios such as industrial control and aerospace systems. Mainstream reconstruction-based anomaly detection methods suffer from two key limitations:…

机器学习 · 计算机科学 2026-04-13 Jun Liu , Ying Chen , Ziqian Lu , Qinyue Tong , Jun Tang

Detecting anomalies in real-world multivariate time series data is challenging due to complex temporal dependencies and inter-variable correlations. Recently, reconstruction-based deep models have been widely used to solve the problem.…

机器学习 · 计算机科学 2023-12-06 Junho Song , Keonwoo Kim , Jeonglyul Oh , Sungzoon Cho