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Temporal difference learning (TD) is a foundational concept in reinforcement learning (RL), aimed at efficiently assessing a policy's value function. TD($\lambda$), a potent variant, incorporates a memory trace to distribute the prediction…

机器学习 · 计算机科学 2024-02-13 Jianfei Ma

Traditional Time-series Anomaly Detection (TAD) methods often struggle with the composite nature of complex time-series data and a diverse array of anomalies. We introduce TADNet, an end-to-end TAD model that leverages Seasonal-Trend…

机器学习 · 计算机科学 2023-12-15 Zhenwei Zhang , Ruiqi Wang , Ran Ding , Yuantao Gu

Connected cars are susceptible to cyberattacks. Security and safety of future vehicles highly depend on a holistic protection of automotive components, of which the time-sensitive backbone network takes a significant role. These onboard…

网络与互联网体系结构 · 计算机科学 2024-05-03 Philipp Meyer , Timo Häckel , Teresa Lübeck , Franz Korf , Thomas C. Schmidt

Unsupervised anomaly detection (AD) is critical for a wide range of practical applications, from network security to health and medical tools. Due to the diversity of problems, no single algorithm has been found to be superior for all AD…

机器学习 · 计算机科学 2023-05-18 Małgorzata Gutowska , Suzanne Little , Andrew McCarren

For modern industrial applications, accurately detecting and diagnosing anomalies in multivariate time series data is essential. Despite such need, most state-of-the-art methods often prioritize detection performance over model…

机器学习 · 计算机科学 2024-10-31 Minha Kim , Kishor Kumar Bhaumik , Amin Ahsan Ali , Simon S. Woo

Recently, with the development of deep learning, end-to-end neural network architectures have been increasingly applied to condition monitoring signals. They have demonstrated superior performance for fault detection and classification, in…

机器学习 · 计算机科学 2021-07-01 Oliver Ammann , Gabriel Michau , Olga Fink

Key Performance Indicators (KPIs) are essential time-series metrics for ensuring the reliability and stability of many software systems. They faithfully record runtime states to facilitate the understanding of anomalous system behaviors and…

软件工程 · 计算机科学 2024-01-15 Jinyang Liu , Wenwei Gu , Zhuangbin Chen , Yichen Li , Yuxin Su , Michael R. Lyu

The boom of DL technology leads to massive DL models built and shared, which facilitates the acquisition and reuse of DL models. For a given task, we encounter multiple DL models available with the same functionality, which are considered…

软件工程 · 计算机科学 2021-03-10 Linghan Meng , Yanhui Li , Lin Chen , Zhi Wang , Di Wu , Yuming Zhou , Baowen Xu

In this paper, we introduce Masked Anomaly Detection (MAD), a general self-supervised learning task for multivariate time series anomaly detection. With the increasing availability of sensor data from industrial systems, being able to…

机器学习 · 计算机科学 2022-10-04 Yiwei Fu , Feng Xue

Anomaly detection is a critical problem in data analysis and pattern recognition, finding applications in various domains. We introduce quantum support vector data description (QSVDD), an unsupervised learning algorithm designed for anomaly…

量子物理 · 物理学 2024-09-19 Hyeondo Oh , Daniel K. Park

Deep neural models in recent years have been successful in almost every field, including extremely complex problem statements. However, these models are huge in size, with millions (and even billions) of parameters, thus demanding more…

计算机视觉与模式识别 · 计算机科学 2021-06-18 Lin Wang , Kuk-Jin Yoon

Outlier detection is an important data mining task with numerous practical applications such as intrusion detection, credit card fraud detection, and video surveillance. However, given a specific complicated task with big data, the process…

机器学习 · 计算机科学 2020-06-23 Yuening Li , Zhengzhang Chen , Daochen Zha , Kaixiong Zhou , Haifeng Jin , Haifeng Chen , Xia Hu

The combination of convolutional and recurrent neural networks is a promising framework that allows the extraction of high-quality spatio-temporal features together with its temporal dependencies, which is key for time series prediction…

In the autoencoder based anomaly detection paradigm, implementing the autoencoder in edge devices capable of learning in real-time is exceedingly challenging due to limited hardware, energy, and computational resources. We show that these…

介观与纳米尺度物理 · 物理学 2025-08-27 Muhammad Sabbir Alam , Walid Al Misba , Jayasimha Atulasimha

Time series anomaly detection plays a crucial role in a wide range of real-world applications. Given that time series data can exhibit different patterns at different sampling granularities, multi-scale modeling has proven beneficial for…

机器学习 · 计算机科学 2025-10-15 Beibu Li , Qichao Shentu , Yang Shu , Hui Zhang , Ming Li , Ning Jin , Bin Yang , Chenjuan Guo

We introduce Test-Time Discovery (TTD) as a novel task that addresses class shifts during testing, requiring models to simultaneously identify emerging categories while preserving previously learned ones. A key challenge in TTD is…

计算机视觉与模式识别 · 计算机科学 2025-03-17 Fan Lyu , Tianle Liu , Zhang Zhang , Fuyuan Hu , Liang Wang

Time series analysis has achieved great success in cyber security such as intrusion detection and device identification. Learning similarities among multiple time series is a crucial problem since it serves as the foundation for downstream…

机器学习 · 计算机科学 2025-06-23 Shaoyu Dou , Kai Yang , Yang Jiao , Chengbo Qiu , Kui Ren

Because reinforcement learning suffers from a lack of scalability, online value (and Q-) function approximation has received increasing interest this last decade. This contribution introduces a novel approximation scheme, namely the Kalman…

机器学习 · 计算机科学 2014-06-13 Matthieu Geist , Olivier Pietquin

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

Detecting anomalies in multivariate time-series data is essential in many real-world applications. Recently, various deep learning-based approaches have shown considerable improvements in time-series anomaly detection. However, existing…

机器学习 · 计算机科学 2022-01-31 Kyeong-Joong Jeong , Yong-Min Shin