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Machine unlearning, the efficient deletion of the impact of specific data in a trained model, remains a challenging problem. Current machine unlearning approaches that focus primarily on data-centric or weight-based strategies frequently…

Machine Learning · Computer Science 2025-08-07 Thang Duc Tran , Thai Hoang Le

Federated learning has received significant attention for its ability to simultaneously protect customer privacy and leverage distributed data from multiple devices for model training. However, conventional approaches often focus on…

Machine Learning · Computer Science 2025-10-07 Jiahao Zeng , Wolong Xing , Liangtao Shi , Xin Huang , Jialin Wang , Zhile Cao , Zhenkui Shi

Contrastive learning (CL) aims to preserve relational structure between samples by learning representations that reflect a similarity graph. Yet, the geometry of the resulting embeddings remains poorly understood. Here we show that weighted…

Machine Learning · Computer Science 2026-05-15 Raphael Vock , Edouard Duchesnay , Benoit Dufumier

State-of-the-art natural language understanding classification models follow two-stages: pre-training a large language model on an auxiliary task, and then fine-tuning the model on a task-specific labeled dataset using cross-entropy loss.…

Computation and Language · Computer Science 2021-04-06 Beliz Gunel , Jingfei Du , Alexis Conneau , Ves Stoyanov

Learning rich visual representations using contrastive self-supervised learning has been extremely successful. However, it is still a major question whether we could use a similar approach to learn superior auditory representations. In this…

Sound · Computer Science 2020-10-20 Haider Al-Tahan , Yalda Mohsenzadeh

This paper proposes a novel federated algorithm that leverages momentum-based variance reduction with adaptive learning to address non-convex settings across heterogeneous data. We intend to minimize communication and computation overhead,…

Machine Learning · Computer Science 2024-12-17 Dipanwita Thakur , Antonella Guzzo , Giancarlo Fortino , Sajal K. Das

Recently, some contrastive learning methods have been proposed to simultaneously learn representations and clustering assignments, achieving significant improvements. However, these methods do not take the category information and…

Computer Vision and Pattern Recognition · Computer Science 2021-04-06 Huasong Zhong , Jianlong Wu , Chong Chen , Jianqiang Huang , Minghua Deng , Liqiang Nie , Zhouchen Lin , Xian-Sheng Hua

Tremendous breakthroughs have been developed in Semi-Supervised Semantic Segmentation (S4) through contrastive learning. However, due to limited annotations, the guidance on unlabeled images is generated by the model itself, which…

Computer Vision and Pattern Recognition · Computer Science 2024-02-29 Haoyu Xie , Changqi Wang , Jian Zhao , Yang Liu , Jun Dan , Chong Fu , Baigui Sun

The existing federated learning (FL) methods for spatio-temporal forecasting fail to capture the inherent spatio-temporal heterogeneity, which calls for personalized FL (PFL) methods to model the spatio-temporally variant patterns. While…

Machine Learning · Computer Science 2024-04-08 Qingxiang Liu , Sheng Sun , Yuxuan Liang , Jingjing Xue , Min Liu

We present federated momentum contrastive clustering (FedMCC), a learning framework that can not only extract discriminative representations over distributed local data but also perform data clustering. In FedMCC, a transformed data pair…

Machine Learning · Computer Science 2022-06-13 Runxuan Miao , Erdem Koyuncu

A two-stage training paradigm consisting of sequential pre-training and meta-training stages has been widely used in current few-shot learning (FSL) research. Many of these methods use self-supervised learning and contrastive learning to…

Computer Vision and Pattern Recognition · Computer Science 2022-09-20 Zhanyuan Yang , Jinghua Wang , Yingying Zhu

Contrastive learning between different views of the data achieves outstanding success in the field of self-supervised representation learning and the learned representations are useful in broad downstream tasks. Since all supervision…

Computer Vision and Pattern Recognition · Computer Science 2022-04-05 Haoqing Wang , Xun Guo , Zhi-Hong Deng , Yan Lu

Self-Supervised Learning (SSL) is a paradigm that leverages unlabeled data for model training. Empirical studies show that SSL can achieve promising performance in distribution shift scenarios, where the downstream and training…

Machine Learning · Computer Science 2023-12-13 Xuyang Zhao , Tianqi Du , Yisen Wang , Jun Yao , Weiran Huang

There are two categories of methods in Federated Learning (FL) for joint training across multiple clients: i) parallel FL (PFL), where clients train models in a parallel manner; and ii) sequential FL (SFL), where clients train models in a…

Machine Learning · Computer Science 2024-05-09 Yipeng Li , Xinchen Lyu

Self-supervised representation learning has made significant leaps fueled by progress in contrastive learning, which seeks to learn transformations that embed positive input pairs nearby, while pushing negative pairs far apart. While…

Computer Vision and Pattern Recognition · Computer Science 2022-01-04 Tri Huynh , Simon Kornblith , Matthew R. Walter , Michael Maire , Maryam Khademi

Federated learning (FL) aims to collaboratively train a shared model across multiple clients without transmitting their local data. Data heterogeneity is a critical challenge in realistic FL settings, as it causes significant performance…

Machine Learning · Computer Science 2023-11-15 Yuwei Wang , Runhan Li , Hao Tan , Xuefeng Jiang , Sheng Sun , Min Liu , Bo Gao , Zhiyuan Wu

Contrastive learning (CL) is a predominant technique in image classification, but they showed limited performance with an imbalanced dataset. Recently, several supervised CL methods have been proposed to promote an ideal regular simplex…

Computer Vision and Pattern Recognition · Computer Science 2026-04-02 Sumin Roh , Harim Kim , Ho Yun Lee , Il Yong Chun

Recently, various contrastive learning techniques have been developed to categorize time series data and exhibit promising performance. A general paradigm is to utilize appropriate augmentations and construct feasible positive samples such…

Machine Learning · Computer Science 2024-10-11 Qianying Ren , Dongsheng Luo , Dongjin Song

Federated learning (FL) allows distributed clients to collaboratively train a global model in a privacy-preserving manner. However, one major challenge is domain skew, where clients' data originating from diverse domains may hinder the…

Machine Learning · Computer Science 2026-03-17 Huan Wang , Jun Shen , Jun Yan , Guansong Pang

In current deep learning paradigms, local training or the Standalone framework tends to result in overfitting and thus poor generalizability. This problem can be addressed by Distributed or Federated Learning (FL) that leverages a parameter…

Machine Learning · Computer Science 2020-08-31 Lingjuan Lyu , Xinyi Xu , Qian Wang