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Yun-Hao Liang

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#natural language process... Preprint Sep 2026

Joint Training Is Not Enough: Conditioned Cross-Granularity Training for Multimodal Document Understanding

The Mutual Reinforcement Effect is tested in multimodal document understanding on three corpora, two of receipts and one of scanned business forms, comparing single-task, joint and conditioned training, which puts one granularity's gold output in the other's prompt during training only.

Cheng-Guang Gan, Yun-Hao Liang, Han-Jun Wei et al. · 0 citations
Jul 2026

A Learning-Rate-Gated Failure of GRPO in a Small Language and Vision-Language Model Web Agent: A Controlled Null and Its Mechanism

This work asks whether it adds skill to a small language and vision-language model web agent at the 4B to 8B scale, or whether it mostly reshapes behavior the supervised model already has, and explains the failure of GRPO.

Cheng-Guang Gan, Zhi-Xi Cai, Yun-Hao Liang et al. · 0 citations
Jul 2026

MAG: A Web-Agent Benchmark and Harness for Multimodal Action and Guide Generation

MAG is introduced, the first benchmark that unifies task execution and guide writing into a single Multimodal Action and Guide task, with two grounding schemes over screenshots: Set-of-Mark element selection and raw pixel coordinates.

Chengguang Gan, Hanjun Wei, Yun-Hao Liang et al. · 0 citations

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