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Zhiwen Ruan

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Book Open access Aug 2026

SAFT: Safety-Preserving Adaptation via Fine-Tuning Transfer for Large Language Models

SAFT (Safety-preserving Adaptation via Fine-tuning Transfer), a safety-preserving adaptation framework that decouples task learning from alignment preservation by learning a safety-guided task update on the paired pretrained base model, rectifying task gradients to avoid conflicting directions with respect to a safety...

Zhiwen Ruan, Yan Yang, Zhuocheng Liang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

AlignDiff: Exploiting Model-Intrinsic Information for Better Preference Data Selection

AlignDiff, a preference data filtering framework driven by intrinsic model signals, first identifies samples with clear preferences using both positive and inverse signals, then prioritizes the more challenging samples based on the average negative log-likelihood gap, encouraging the model to learn richer information f...

Peng Lai, He Zhu, Zhiwen Ruan et al. · 1 citation
Conference Open access Jul 2026

VFA: Empowering Multilingual MLLMs via Vision-Free Adaptation

Vision-Free Adaptation (VFA) is proposed, a framework that decouples multilingual language enhancement from visual alignment by composing complementary task vectors over a shared LLM backbone.

Yixia Li, Yaqing Shi, Zhiwen Ruan et al. · 0 citations
Book Open access Aug 2026

SAFT: Safety-Preserving Adaptation via Fine-Tuning Transfer for Large Language Models

SAFT (Safety-preserving Adaptation via Fine-tuning Transfer), a safety-preserving adaptation framework that decouples task learning from alignment preservation by learning a safety-guided task update on the paired pretrained base model, rectifying task gradients to avoid conflicting directions with respect to a safety...

Zhiwen Ruan, Yan Yang, Zhuocheng Liang et al. · 0 citations

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