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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…

机器学习 · 计算机科学 2019-01-17 Dan Li , Dacheng Chen , Lei Shi , Baihong Jin , Jonathan Goh , See-Kiong Ng

It is a difficult task to classify images with multiple class labels using only a small number of labeled examples, especially when the label (class) distribution is imbalanced. Emotion classification is such an example of imbalanced label…

计算机视觉与模式识别 · 计算机科学 2017-12-15 Xinyue Zhu , Yifan Liu , Zengchang Qin , Jiahong Li

Generative adversarial networks are a class of generative algorithms that have been widely used to produce state-of-the-art samples. In this paper, we investigate GAN to perform anomaly detection on time series dataset. In order to achieve…

机器学习 · 统计学 2018-12-12 Ilyass Haloui , Jayant Sen Gupta , Vincent Feuillard

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…

机器学习 · 计算机科学 2021-08-31 Kasra Babaei , Zhi Yuan Chen , Tomas Maul

This paper proposed a novel anomaly detection (AD) approach of High-speed Train images based on convolutional neural networks and the Vision Transformer. Different from previous AD works, in which anomalies are identified with a single…

计算机视觉与模式识别 · 计算机科学 2022-03-30 Zhixue Wang , Yu Zhang , Lin Luo , Nan Wang

Anomaly detection (AD) is the machine learning task of identifying highly discrepant abnormal samples by solely relying on the consistency of the normal training samples. Under the constraints of a distribution shift, the assumption that…

机器学习 · 计算机科学 2023-12-25 João B. S. Carvalho , Mengtao Zhang , Robin Geyer , Carlos Cotrini , Joachim M. Buhmann

In one-class-learning tasks, only the normal case (foreground) can be modeled with data, whereas the variation of all possible anomalies is too erratic to be described by samples. Thus, due to the lack of representative data, the…

计算机视觉与模式识别 · 计算机科学 2019-06-03 Duc Tam Nguyen , Zhongyu Lou , Michael Klar , Thomas Brox

Unsupervised image translation, which aims in translating two independent sets of images, is challenging in discovering the correct correspondences without paired data. Existing works build upon Generative Adversarial Network (GAN) such…

计算机视觉与模式识别 · 计算机科学 2018-02-20 Shuang Ma , Jianlong Fu , Chang Wen Chen , Tao Mei

Different from the current node-level anomaly detection task, the goal of graph-level anomaly detection is to find abnormal graphs that significantly differ from others in a graph set. Due to the scarcity of research on the work of…

机器学习 · 计算机科学 2023-08-07 Fu Lin , Xuexiong Luo , Jia Wu , Jian Yang , Shan Xue , Zitong Wang , Haonan Gong

Adversarial attacks on image classification systems have always been an important problem in the field of machine learning, and generative adversarial networks (GANs), as popular models in the field of image generation, have been widely…

计算机视觉与模式识别 · 计算机科学 2024-12-25 Yahe Yang

Acoustic anomaly detection aims at distinguishing abnormal acoustic signals from the normal ones. It suffers from the class imbalance issue and the lacking in the abnormal instances. In addition, collecting all kinds of abnormal or unknown…

音频与语音处理 · 电气工程与系统科学 2020-02-06 Chengwei Chen , Pan Chen , Lingyu Yang , Jinyuan Mo , Haichuan Song , Yuan Xie , Lizhuang Ma

Unsupervised anomaly detection aims to identify anomalous samples from highly complex and unstructured data, which is pervasive in both fundamental research and industrial applications. However, most existing methods neglect the complex…

机器学习 · 计算机科学 2020-10-20 Haoyi Fan , Fengbin Zhang , Ruidong Wang , Liang Xi , Zuoyong Li

Unified anomaly detection (AD) is one of the most challenges for anomaly detection, where one unified model is trained with normal samples from multiple classes with the objective to detect anomalies in these classes. For such a challenging…

机器学习 · 计算机科学 2024-07-08 Xincheng Yao , Ruoqi Li , Zefeng Qian , Lu Wang , Chongyang Zhang

Remote sensing change detection between bi-temporal images receives growing concentration from researchers. However, comparing two bi-temporal images for detecting changes is challenging, as they demonstrate different appearances. In this…

计算机视觉与模式识别 · 计算机科学 2023-10-04 Luyi Qiu , Xiaofeng Zhang , ChaoChen Gu , and ShanYing Zhu

Anomaly detection is the practice of identifying items or events that do not conform to an expected behavior or do not correlate with other items in a dataset. It has previously been applied to areas such as intrusion detection, system…

网络与互联网体系结构 · 计算机科学 2018-01-31 James Zhang , Ilija Vukotic , Robert Gardner

Synthesising a text-to-image model of high-quality images by guiding the generative model through the Text description is an innovative and challenging task. In recent years, AttnGAN based on the Attention mechanism to guide GAN training…

计算机视觉与模式识别 · 计算机科学 2023-07-07 Mingyu Jin , Chong Zhang , Qinkai Yu , Haochen Xue , Xiaobo Jin , Xi Yang

Generating images according to natural language descriptions is a challenging task. Prior research has mainly focused to enhance the quality of generation by investigating the use of spatial attention and/or textual attention thereby…

计算机视觉与模式识别 · 计算机科学 2022-01-17 Henning Schulze , Dogucan Yaman , Alexander Waibel

Breast cancer classification remains a challenging task due to inter-class ambiguity and intra-class variability. Existing deep learning-based methods try to confront this challenge by utilizing complex nonlinear projections. However, these…

计算机视觉与模式识别 · 计算机科学 2020-10-08 Xiao Kang , Xingbo Liu , Xiushan Nie , Xiaoming Xi , Yilong Yin

Anomaly detection in time series has been widely researched and has important practical applications. In recent years, anomaly detection algorithms are mostly based on deep-learning generative models and use the reconstruction error to…

机器学习 · 计算机科学 2020-10-15 Chunkai Zhang , Wei Zuo , Xuan Wang

Nowadays, graph-structured data are increasingly used to model complex systems. Meanwhile, detecting anomalies from graph has become a vital research problem of pressing societal concerns. Anomaly detection is an unsupervised learning task…

机器学习 · 计算机科学 2021-03-29 Xuhong Wang , Baihong Jin , Ying Du , Ping Cui , Yupu Yang