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Foundation Models (FMs), such as LLaMA, BERT, GPT, ViT, and CLIP, have demonstrated remarkable success in a wide range of applications, driven by their ability to leverage vast amounts of data for pre-training. However, optimizing FMs often…

Machine Learning · Computer Science 2024-03-21 Sixing Yu , J. Pablo Muñoz , Ali Jannesari

Reinforcement Learning from Human Feedback (RLHF) is a powerful paradigm for aligning foundation models to human values and preferences. However, current RLHF techniques cannot account for the naturally occurring differences in individual…

Machine Learning · Computer Science 2024-08-20 Sriyash Poddar , Yanming Wan , Hamish Ivison , Abhishek Gupta , Natasha Jaques

Federated Learning (FL) is a distributed machine learning strategy, developed for settings where training data is owned by distributed devices and cannot be shared. FL circumvents this constraint by carrying out model training in…

Machine Learning · Computer Science 2025-01-24 Maria Hartmann , Grégoire Danoy , Pascal Bouvry

Multi-Label Recognition (MLR) based on Vision-Language Models (VLMs) aims to leverage their pre-trained knowledge to better adapt complex recognition scenarios, thereby enhancing model robustness. However, for realistic decentralized…

Artificial Intelligence · Computer Science 2026-05-28 Xucong Wang , Pengkun Wang , Zhe Zhao , Liheng Yu , Shuang Wang , Yang Wang

Reinforcement Learning from Human Feedback (RLHF) has emerged as a powerful technique for aligning large language models (LLMs) with human preferences. However, effectively aligning LLMs with diverse human preferences remains a significant…

Computation and Language · Computer Science 2025-07-03 Chengao Li , Hanyu Zhang , Yunkun Xu , Hongyan Xue , Xiang Ao , Qing He

Applying large pre-trained Vision-Language Models to recommendation is a burgeoning field, a direction we term Vision-Language-Recommendation (VLR). Bringing VLR to user-oriented on-device intelligence within a federated learning framework…

Information Retrieval · Computer Science 2025-11-04 Zhiwei Li , Guodong Long , Jing Jiang , Chengqi Zhang , Qiang Yang

Multi-objective alignment aims to align LLM responses with multiple human preference objectives. Among existing methods, guiding the generation of frozen LLMs through autoregressive reward models (ARMs) to accomplish multi-objective…

Computation and Language · Computer Science 2026-02-11 Hongyan Xie , Yikun Ban , Ruiyu Fang , Zixuan Huang , Deqing Wang , Jianxin Li , Yitong Yao , Chao Wang , Shuangyong Song

As Large Language Models (LLMs) push the boundaries of AI capabilities, their demand for data is growing. Much of this data is private and distributed across edge devices, making Federated Learning (FL) a de-facto alternative for…

Machine Learning · Computer Science 2024-08-22 Hanzi Mei , Dongqi Cai , Ao Zhou , Shangguang Wang , Mengwei Xu

As a promising privacy-preserving machine learning method, Federated Learning (FL) enables global model training across clients without compromising their confidential local data. However, existing FL methods suffer from the problem of low…

Machine Learning · Computer Science 2022-08-23 Ming Hu , Zhihao Yue , Zhiwei Ling , Xian Wei , Mingsong Chen

Despite recent advancements in federated learning (FL) for medical image diagnosis, addressing data heterogeneity among clients remains a significant challenge for practical implementation. A primary hurdle in FL arises from the non-IID…

Machine Learning · Computer Science 2024-07-09 Pranab Sahoo , Ashutosh Tripathi , Sriparna Saha , Samrat Mondal

For aligning large language models (LLMs), prior work has leveraged reinforcement learning via human feedback (RLHF) or variations of direct preference optimization (DPO). While DPO offers a simpler framework based on maximum likelihood…

Artificial Intelligence · Computer Science 2025-05-27 Anirudhan Badrinath , Prabhat Agarwal , Jiajing Xu

A single language model, even when aligned with labelers through reinforcement learning from human feedback (RLHF), may not suit all human preferences. Recent approaches therefore prefer customization, gathering multi-dimensional feedback,…

Machine Learning · Computer Science 2024-08-20 Zhanhui Zhou , Jie Liu , Jing Shao , Xiangyu Yue , Chao Yang , Wanli Ouyang , Yu Qiao

Large Language Models (LLMs) have demonstrated remarkable capabilities across various domains, particularly in task generalization for both text and vision data. While fine-tuning these models can significantly enhance their performance on…

Machine Learning · Computer Science 2025-01-15 Navyansh Mahla , Kshitij Sharad Jadhav , Ganesh Ramakrishnan

The paradigm of vertical federated learning (VFL), where institutions collaboratively train machine learning models via combining each other's local feature or label information, has achieved great success in applications to financial risk…

Machine Learning · Computer Science 2023-11-01 Ruofan Wu , Mingyang Zhang , Lingjuan Lyu , Xiaolong Xu , Xiuquan Hao , Xinyi Fu , Tengfei Liu , Tianyi Zhang , Weiqiang Wang

Vision-language pre-training (VLP) has emerged as an effective scheme for multimodal representation learning, but its reliance on large-scale multimodal data poses significant challenges for medical applications. Federated learning (FL)…

Machine Learning · Computer Science 2024-11-25 Zitao Shuai , Chenwei Wu , Zhengxu Tang , Liyue Shen

Federated Learning (FL) facilitates the fine-tuning of Foundation Models (FMs) using distributed data sources, with Low-Rank Adaptation (LoRA) gaining popularity due to its low communication costs and strong performance. While recent work…

Machine Learning · Computer Science 2025-05-27 Zihao Peng , Jiandian Zeng , Boyuan Li , Guo Li , Shengbo Chen , Tian Wang

While federated learning traditionally aims to train a single global model across decentralized local datasets, one model may not always be ideal for all participating clients. Here we propose an alternative, where each client only…

Machine Learning · Computer Science 2021-03-30 Michael Zhang , Karan Sapra , Sanja Fidler , Serena Yeung , Jose M. Alvarez

Aligning large language models (LLMs) with human preferences is critical for enhancing LLMs' safety, helpfulness, humor, faithfulness, etc. Current reinforcement learning from human feedback (RLHF) mainly focuses on a fixed reward learned…

Machine Learning · Computer Science 2026-04-07 Qiang He , Yucheng Yang , Tianyi Zhou , Meng Fang , Mykola Pechenizkiy , Setareh Maghsudi

The alignment of large language models (LLMs) with human preferences remains a key challenge. While post-training techniques like Reinforcement Learning from Human Feedback (RLHF) and Direct Preference Optimization (DPO) have achieved…

Artificial Intelligence · Computer Science 2025-07-11 Qingyu Yin , Chak Tou Leong , Minjun Zhu , Hanqi Yan , Qiang Zhang , Yulan He , Wenjie Li , Jun Wang , Yue Zhang , Linyi Yang

Large vision-language models (LVLMs) often fail to align with human preferences, leading to issues like generating misleading content without proper visual context (also known as hallucination). A promising solution to this problem is using…

Computer Vision and Pattern Recognition · Computer Science 2025-02-03 Chenglong Wang , Yang Gan , Yifu Huo , Yongyu Mu , Murun Yang , Qiaozhi He , Tong Xiao , Chunliang Zhang , Tongran Liu , Quan Du , Di Yang , Jingbo Zhu