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Related papers: TimeMAE: Self-Supervised Representations of Time S…

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In this work, we investigate the time series representation learning problem using self-supervised techniques. Contrastive learning is well-known in this area as it is a powerful method for extracting information from the series and…

Machine Learning · Computer Science 2024-10-08 Duy A. Nguyen , Trang H. Tran , Huy Hieu Pham , Phi Le Nguyen , Lam M. Nguyen

Time series shapelets are discriminative subsequences that have been recently found effective for time series clustering (TSC). The shapelets are convenient for interpreting the clusters. Thus, the main challenge for TSC is to discover…

Machine Learning · Computer Science 2022-08-19 Guozhong Li , Byron Choi , Jianliang Xu , Sourav S Bhowmick , Daphne Ngar-yin Mah , Grace Lai-Hung Wong

We argue that time series analysis is fundamentally different in nature to either vision or natural language processing with respect to the forms of meaningful self-supervised learning tasks that can be defined. Motivated by this insight,…

Machine Learning · Computer Science 2023-12-13 Navid Mohammadi Foumani , Chang Wei Tan , Geoffrey I. Webb , Hamid Rezatofighi , Mahsa Salehi

Despite the progresses on pre-trained language models, there is a lack of unified frameworks for pre-trained sentence representation. As such, it calls for different pre-training methods for specific scenarios, and the pre-trained models…

Computation and Language · Computer Science 2022-08-02 Alexander Liu , Samuel Yang

Low-dose computed tomography (LDCT) reduces the X-ray radiation but compromises image quality with more noises and artifacts. A plethora of transformer models have been developed recently to improve LDCT image quality. However, the success…

Image and Video Processing · Electrical Eng. & Systems 2022-10-18 Dayang Wang , Yongshun Xu , Shuo Han , Hengyong Yu

The lack of quality labeled data is one of the main bottlenecks for training Deep Learning models. As the task increases in complexity, there is a higher penalty for overfitting and unstable learning. The typical paradigm employed today is…

Computer Vision and Pattern Recognition · Computer Science 2023-09-08 Priyam Mazumdar , Aiman Soliman , Volodymyr Kindratenko , Luigi Marini , Kenton McHenry

Recently, significant progress has been made in masked image modeling to catch up to masked language modeling. However, unlike words in NLP, the lack of semantic decomposition of images still makes masked autoencoding (MAE) different…

Computer Vision and Pattern Recognition · Computer Science 2022-10-06 Gang Li , Heliang Zheng , Daqing Liu , Chaoyue Wang , Bing Su , Changwen Zheng

A significant challenge in sound event detection (SED) is the effective utilization of unlabeled data, given the limited availability of labeled data due to high annotation costs. Semi-supervised algorithms rely on labeled data to learn…

Sound · Computer Science 2024-09-27 Pengfei Cai , Yan Song , Nan Jiang , Qing Gu , Ian McLoughlin

We introduce the concept of a Modular Autoencoder (MAE), capable of learning a set of diverse but complementary representations from unlabelled data, that can later be used for supervised tasks. The learning of the representations is…

Machine Learning · Computer Science 2015-11-24 Henry W J Reeve , Gavin Brown

This study explores the application of self-supervised learning (SSL) to the task of motion forecasting, an area that has not yet been extensively investigated despite the widespread success of SSL in computer vision and natural language…

Robotics · Computer Science 2023-08-22 Jie Cheng , Xiaodong Mei , Ming Liu

The development of deep learning models in medical image analysis is majorly limited by the lack of large-sized and well-annotated datasets. Unsupervised learning does not require labels and is more suitable for solving medical image…

Computer Vision and Pattern Recognition · Computer Science 2023-01-06 Zi'an Xu , Yin Dai , Fayu Liu , Weibing Chen , Yue Liu , Lifu Shi , Sheng Liu , Yuhang Zhou

Time series analysis is widely used in extensive areas. Recently, to reduce labeling expenses and benefit various tasks, self-supervised pre-training has attracted immense interest. One mainstream paradigm is masked modeling, which…

Machine Learning · Computer Science 2023-10-24 Jiaxiang Dong , Haixu Wu , Haoran Zhang , Li Zhang , Jianmin Wang , Mingsheng Long

Self-supervised learning has been actively studied in time series domain recently, especially for masked reconstruction. Most of these methods follow the "Pre-training + Fine-tuning" paradigm in which a new decoder replaces the pre-trained…

Machine Learning · Computer Science 2023-11-08 Hao Liu , Jinrui Gan , Xiaoxuan Fan , Yi Zhang , Chuanxian Luo , Jing Zhang , Guangxin Jiang , Yucheng Qian , Changwei Zhao , Huan Ma , Zhenyu Guo

The hematology analytics used for detection and classification of small blood components is a significant challenge. In particular, when objects exists as small pixel-sized entities in a large context of similar objects. Deep learning…

Computer Vision and Pattern Recognition · Computer Science 2026-02-10 H. Martin Gillis , Ming Hill , Paul Hollensen , Alan Fine , Thomas Trappenberg

Unsupervised pre-training was a critical technique for training deep neural networks years ago. With sufficient labeled data and modern training techniques, it is possible to train very deep neural networks from scratch in a purely…

Computer Vision and Pattern Recognition · Computer Science 2017-03-29 Jianfeng Dong , Xiao-Jiao Mao , Chunhua Shen , Yu-Bin Yang

In recent times, the field of unsupervised representation learning (URL) for time series data has garnered significant interest due to its remarkable adaptability across diverse downstream applications. Unsupervised learning goals differ…

Machine Learning · Computer Science 2025-05-12 Chen Liang , Donghua Yang , Zhiyu Liang , Hongzhi Wang , Zheng Liang , Xiyang Zhang , Jianfeng Huang

Unsupervised/self-supervised representation learning in time series is critical since labeled samples are usually scarce in real-world scenarios. Existing approaches mainly leverage the contrastive learning framework, which automatically…

Machine Learning · Computer Science 2023-07-10 Wenrui Zhang , Ling Yang , Shijia Geng , Shenda Hong

Pre-trained language models have achieved promising performance on general benchmarks, but underperform when migrated to a specific domain. Recent works perform pre-training from scratch or continual pre-training on domain corpora. However,…

Computation and Language · Computer Science 2022-11-02 Dou Hu , Xiaolong Hou , Xiyang Du , Mengyuan Zhou , Lianxin Jiang , Yang Mo , Xiaofeng Shi

Masked time series modeling has recently gained much attention as a self-supervised representation learning strategy for time series. Inspired by masked image modeling in computer vision, recent works first patchify and partially mask out…

Machine Learning · Computer Science 2024-05-03 Seunghan Lee , Taeyoung Park , Kibok Lee

With the exponential growth of multimedia data, leveraging multimodal sensors presents a promising approach for improving accuracy in human activity recognition. Nevertheless, accurately identifying these activities using both video data…

Computer Vision and Pattern Recognition · Computer Science 2024-08-09 Rex Liu , Xin Liu