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Dataset-level heterogeneity introduces significant domain biases that fundamentally degrade generalization on general Time Series Foundation Models (TSFMs), yet this challenge remains underexplored. This paper rethinks the from-scratch…

Machine Learning · Computer Science 2026-03-17 Shengchao Chen , Guodong Long , Michael Blumenstein , Jing Jiang

Unsupervised domain adaptation (UDA) aims to transfer and adapt knowledge from a labeled source domain to an unlabeled target domain. Traditionally, subspace-based methods form an important class of solutions to this problem. Despite their…

Machine Learning · Computer Science 2022-01-07 Kowshik Thopalli , Jayaraman J Thiagarajan , Rushil Anirudh , Pavan K Turaga

Medical image segmentation is challenging due to the diversity of medical images and the lack of labeled data, which motivates recent developments in federated semi-supervised learning (FSSL) to leverage a large amount of unlabeled data…

Computer Vision and Pattern Recognition · Computer Science 2025-08-06 Zhipeng Deng , Zhe Xu , Tsuyoshi Isshiki , Yefeng Zheng

Domain generalization involves learning a classifier from a heterogeneous collection of training sources such that it generalizes to data drawn from similar unknown target domains, with applications in large-scale learning and personalized…

Machine Learning · Computer Science 2021-12-24 Xavier Thomas , Dhruv Mahajan , Alex Pentland , Abhimanyu Dubey

In this paper, we propose a novel approach, Federated Domain Generalization with Label Smoothing and Balanced Decentralized Training (FedSB), to address the challenges of data heterogeneity within a federated learning framework. FedSB…

Machine Learning · Computer Science 2025-02-11 Milad Soltany , Farhad Pourpanah , Mahdiyar Molahasani , Michael Greenspan , Ali Etemad

Federated Learning has become a widely-used framework which allows learning a global model on decentralized local datasets under the condition of protecting local data privacy. However, federated learning faces severe optimization…

Machine Learning · Computer Science 2023-01-26 Wenkai Yang , Yankai Lin , Guangxiang Zhao , Peng Li , Jie Zhou , Xu Sun

Deep learning models can achieve high accuracy when trained on large amounts of labeled data. However, real-world scenarios often involve several challenges: Training data may become available in installments, may originate from multiple…

Computer Vision and Pattern Recognition · Computer Science 2023-02-14 Boqi Chen , Kevin Thandiackal , Pushpak Pati , Orcun Goksel

In this article, we propose an approach for federated domain adaptation, a setting where distributional shift exists among clients and some have unlabeled data. The proposed framework, FedDaDiL, tackles the resulting challenge through…

A dominant approach for addressing unsupervised domain adaptation is to map data points for the source and the target domains into an embedding space which is modeled as the output-space of a shared deep encoder. The encoder is trained to…

Machine Learning · Computer Science 2022-09-30 Mohammad Rostami

Domain Generalization (DG) research has gained considerable traction as of late, since the ability to generalize to unseen data distributions is a requirement that eludes even state-of-the-art training algorithms. In this paper we observe…

Machine Learning · Computer Science 2025-07-22 Aristotelis Ballas , Christos Diou

Federated Learning (FL) enables decentralized model training across multiple clients without exposing private data, making it ideal for privacy-sensitive applications. However, in real-world FL scenarios, clients often hold data from…

Computer Vision and Pattern Recognition · Computer Science 2026-04-09 Huy Q. Le , Loc X. Nguyen , Yu Qiao , Seong Tae Kim , Eui-Nam Huh , Choong Seon Hong

In personalized Federated Learning (pFL), high data heterogeneity can cause significant gradient divergence across devices, adversely affecting the learning process. This divergence, especially when gradients from different users form an…

Machine Learning · Computer Science 2024-10-07 Minh Duong Nguyen , Khanh Le , Khoi Do , Nguyen H. Tran , Duc Nguyen , Chien Trinh , Zhaohui Yang

Learning from the collective knowledge of data dispersed across private sources can provide neural networks with enhanced generalization capabilities. Federated learning, a method for collaboratively training a machine learning model across…

Machine Learning · Computer Science 2024-05-20 Matt Gorbett , Hossein Shirazi , Indrakshi Ray

Unsupervised domain adaptation for point cloud semantic segmentation has attracted great attention due to its effectiveness in learning with unlabeled data. Most of existing methods use global-level feature alignment to transfer the…

Computer Vision and Pattern Recognition · Computer Science 2022-08-10 Yikai Bian , Le Hui , Jianjun Qian , Jin Xie

When domains, which represent underlying data distributions, vary during training and testing processes, deep neural networks suffer a drop in their performance. Domain generalization allows improvements in the generalization performance…

Computer Vision and Pattern Recognition · Computer Science 2019-11-19 Toshihiko Matsuura , Tatsuya Harada

Discriminative unsupervised learning methods such as contrastive learning have demonstrated the ability to learn generalized visual representations on centralized data. It is nonetheless challenging to adapt such methods to a distributed…

Computer Vision and Pattern Recognition · Computer Science 2025-06-13 Yuewei Yang , Jingwei Sun , Ang Li , Hai Li , Yiran Chen

Semi-Supervised Federated Learning (SSFL) is gaining popularity over conventional Federated Learning in many real-world applications. Due to the practical limitation of limited labeled data on the client side, SSFL considers that…

Computer Vision and Pattern Recognition · Computer Science 2025-05-28 Sabbir Ahmed , Mamshad Nayeem Rizve , Abdullah Al Arafat , Jacqueline Liu , Rahim Hossain , Mohaiminul Al Nahian , Adnan Siraj Rakin

Federated learning improves data privacy and efficiency in machine learning performed over networks of distributed devices, such as mobile phones, IoT and wearable devices, etc. Yet models trained with federated learning can still fail to…

Computer Vision and Pattern Recognition · Computer Science 2025-08-26 Xingchao Peng , Zijun Huang , Yizhe Zhu , Kate Saenko

Federated Learning (FL) has emerged as a crucial distributed training paradigm, enabling discrete devices to collaboratively train a shared model under the coordination of a central server, while leveraging their locally stored private…

Machine Learning · Computer Science 2024-09-02 Wenhao Yuan , Xuehe Wang

Domain generalization (DG) aims to incorporate knowledge from multiple source domains into a single model that could generalize well on unseen target domains. This problem is ubiquitous in practice since the distributions of the target data…

Machine Learning · Statistics 2019-07-26 Shoubo Hu , Kun Zhang , Zhitang Chen , Laiwan Chan