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Deyu Meng

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#artificial intelligence Preprint Oct 2026

Where to Adapt Matters: Layer-Selective Fine-Tuning for Capability Retention

Parameter-efficient fine-tuning (PEFT) enables large language models (LLMs) to adapt to specialized tasks, but often at the cost of degrading general capabilities acquired during pretraining. Existing approaches primarily mitigate this trade-off through data replay or regularization, relying on additional data or expli...

Zhi-Qian Pang, Zi-Hong Sun, Qi Xie et al. · 0 citations
Jul 2026

Sharper Analysis of Single-Loop Methods for Bilevel Optimization

This work establishes sharper convergence results for single-loop approximate implicit differentiation (AID) and iterative differentiation (ITD) methods, leveraging the proposed analytical framework, decoupled norm analysis (DNA).

Yubo Zhou, Jun Shu, Luo Luo et al. · 0 citations
Jul 2026

Harnessing the Potential of Optimizing Data Mixtures via Bayesian Domain Reweighting

Experimental results demonstrate that proposed Bayesian domain weighting method could achieve stable and efficient domain weights learning, and identifies optimal mixtures while consuming substantially less data than search-based function-fitting methods, revitalizing optimization-based domain weighting for large-scale...

Xiang Yuan, Kai-Qing Lei, Zhenyu Jin et al. · 0 citations

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