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Unsupervised time series clustering is a challenging problem with diverse industrial applications such as anomaly detection, bio-wearables, etc. These applications typically involve small, low-power devices on the edge that collect and…

机器学习 · 计算机科学 2021-06-01 Shreyas Chaudhari , Harideep Nair , José M. F. Moura , John Paul Shen

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…

机器学习 · 计算机科学 2023-07-10 Wenrui Zhang , Ling Yang , Shijia Geng , Shenda Hong

General-purpose foundation models for neural time series can help accelerate neuroscientific discoveries and enable applications such as brain computer interfaces (BCIs). A key component in scaling these models is population-level…

机器学习 · 计算机科学 2025-11-18 Eshani Patel , Yisong Yue , Geeling Chau

The segmentation of lesions in Moderate to Severe Traumatic Brain Injury (msTBI) presents a significant challenge in neuroimaging due to the diverse characteristics of these lesions, which vary in size, shape, and distribution across brain…

计算机视觉与模式识别 · 计算机科学 2025-04-10 Constantin Ulrich , Tassilo Wald , Fabian Isensee , Klaus H. Maier-Hein

Time series classification is a critical task in various domains, such as finance, healthcare, and sensor data analysis. Unsupervised contrastive learning has garnered significant interest in learning effective representations from time…

机器学习 · 计算机科学 2025-03-24 Huili Cai , Xiang Zhang , Xiaofeng Liu

We present a new Self-Supervised Learning (SSL) approach to pre-train encoders on unlabeled audio data that reduces the need for large amounts of labeled data for audio and speech classification. Our primary aim is to learn audio…

音频与语音处理 · 电气工程与系统科学 2023-05-19 Ashish Seth , Sreyan Ghosh , S. Umesh , Dinesh Manocha

Clustering is ubiquitous in data analysis, including analysis of time series. It is inherently subjective: different users may prefer different clusterings for a particular dataset. Semi-supervised clustering addresses this by allowing the…

机器学习 · 统计学 2018-05-03 Toon Van Craenendonck , Wannes Meert , Sebastijan Dumancic , Hendrik Blockeel

The rapidly emerging field of computational pathology has the potential to enable objective diagnosis, therapeutic response prediction and identification of new morphological features of clinical relevance. However, deep learning-based…

图像与视频处理 · 电气工程与系统科学 2020-05-25 Ming Y. Lu , Drew F. K. Williamson , Tiffany Y. Chen , Richard J. Chen , Matteo Barbieri , Faisal Mahmood

Finding effective representations for time series data is a useful but challenging task. Several works utilize self-supervised or unsupervised learning methods to address this. However, there still remains the open question of how to…

机器学习 · 计算机科学 2024-03-19 Yuansan Liu , Sudanthi Wijewickrema , Christofer Bester , Stephen O'Leary , James Bailey

In medical image analysis, the cost of acquiring high-quality data and their annotation by experts is a barrier in many medical applications. Most of the techniques used are based on supervised learning framework and need a large amount of…

计算机视觉与模式识别 · 计算机科学 2022-10-20 Siladittya Manna , Saumik Bhattacharya , Umapada Pal

Spiking neural networks (SNNs) exhibit temporal, sparse, and event-driven dynamics that make them appealing for efficient inference. However, extending these models to self-supervised regimes remains challenging because the discontinuities…

新兴技术 · 计算机科学 2025-11-25 Chengwei Zhou , Gourav Datta

Technological advances facilitate the ability to acquire multimodal data, posing a challenge for recognition systems while also providing an opportunity to use the heterogeneous nature of the information to increase the generalization…

机器学习 · 计算机科学 2024-08-06 Paweł Zyblewski , Leandro L. Minku

Self-supervised methods have significantly closed the gap with end-to-end supervised learning for image classification. In the case of human action videos, however, where both appearance and motion are significant factors of variation, this…

计算机视觉与模式识别 · 计算机科学 2022-06-28 Salar Hosseini Khorasgani , Yuxuan Chen , Florian Shkurti

Amortized simulation-based inference (SBI) methods train neural networks on simulated data to perform Bayesian inference. While this strategy avoids the need for tractable likelihoods, it often requires a large number of simulations and has…

机器学习 · 计算机科学 2025-03-04 Manuel Gloeckler , Shoji Toyota , Kenji Fukumizu , Jakob H. Macke

Self-supervised learning presents a remarkable performance to utilize unlabeled data for various video tasks. In this paper, we focus on applying the power of self-supervised methods to improve semi-supervised action proposal generation.…

计算机视觉与模式识别 · 计算机科学 2021-04-08 Xiang Wang , Shiwei Zhang , Zhiwu Qing , Yuanjie Shao , Changxin Gao , Nong Sang

Computed tomography (CT) samples with pathological annotations are difficult to obtain. As a result, the computer-aided diagnosis (CAD) algorithms are trained on small datasets (e.g., LIDC-IDRI with 1,018 samples), limiting their accuracies…

计算机视觉与模式识别 · 计算机科学 2022-08-24 Penghua Zhai , Enwei Zhu , Baolian Qi , Xin Wei , Jinpeng Li

Self-supervised learning (SSL) has emerged as a powerful technique for learning rich representations from unlabeled data. The data representations are able to capture many underlying attributes of data, and be useful in downstream…

机器学习 · 计算机科学 2023-12-01 Weicheng Zhu , Sheng Liu , Carlos Fernandez-Granda , Narges Razavian

Autism spectrum disorder (ASD) remains a challenging condition to diagnose effectively and promptly, despite global efforts in public health, clinical screening, and scientific research. Traditional diagnostic methods, primarily reliant on…

计算机与社会 · 计算机科学 2025-03-11 Nora Fink

Time series analysis faces significant challenges in handling variable-length data and achieving robust generalization. While Transformer-based models have advanced time series tasks, they often struggle with feature redundancy and limited…

机器学习 · 计算机科学 2025-09-23 Kai Zhang , Siming Sun , Zhengyu Fan , Qinmin Yang , Xuejun Jiang

Objective: An electroencephalogram (EEG)-based brain-computer interface (BCI) enables direct communication between the human brain and a computer. Due to individual differences and non-stationarity of EEG signals, such BCIs usually require…

人机交互 · 计算机科学 2024-12-11 Siyang Li , Ziwei Wang , Hanbin Luo , Lieyun Ding , Dongrui Wu