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Junkang Liu

6 accepted papers

2026

DP-FedAdamW: An Efficient Optimizer for Differentially Private Federated Large Models

CVPR 2026

Balancing convergence efficiency and robustness under Differential Privacy (DP) is a central challenge in Federated Learning (FL). Although AdamW accelerates training and fine-tuning in large-scale models, we find that directly applying it to Differentially Private FL (DPFL) suffers from three major

Cited by 0SourcecodeScholar
2026

FedAdamW: A Communication-Efficient Optimizer with Convergence and Generalization Guarantees for Federated Large Models

AAAI 2026technical

AdamW has become one of the most effective optimizers for training large-scale models. We have also observed its effectiveness in the context of federated learning (FL). However, directly applying AdamW in federated learning settings poses significant challenges: (1) due to data heterogeneity, AdamW

Cited by 0SourcePDFScholar
2026

LAVA: A Unified Framework for Finetuning Language and Vision Models

ICML 2026poster

LoRA and its variants have attracted considerable attention because of their abilities to tune a negligible number of parameters while achieving comparable downstream performance. This success is largely attributed to the intrinsic low-rank structure of model parameter spaces, which allows LoRA to t…

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2026

Rethinking LoRA for Privacy-Preserving Federated Learning in Large Models

ICLR 2026poster

Fine-tuning large vision models (LVMs) and large language models (LLMs) under differentially private federated learning (DPFL) is hindered by a fundamental privacy-utility trade-off. Low-Rank Adaptation (LoRA), a promising parameter-efficient fine-tuning (PEFT) method, reduces computational and comm…

Cited by 0SourcecodeScholar
2025

Improving Generalization in Federated Learning with Highly Heterogeneous Data via Momentum-Based Stochastic Controlled Weight Averaging

ICML 2025poster

For federated learning (FL) algorithms such as FedSAM, their generalization capability is crucial for real-word applications. In this paper, we revisit the generalization problem in FL and investigate the impact of data heterogeneity on FL generalization. We find that FedSAM usually performs worse t…

Cited by 0SourcePDFScholar
2025

Tight High-Probability Bounds for Nonconvex Heavy-Tailed Scenario under Weaker Assumptions

NeurIPS 2025poster

Gradient clipping is increasingly important in centralized learning (CL) and federated learning (FL). Many works focus on its optimization properties under strong assumptions involving Gaussian noise and standard smoothness. However, practical machine learning tasks often only satisfy weaker conditi…

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