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Guangyuan Dong

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#artificial intelligence Preprint Oct 2026

Conditional Rank Allocation for Taxonomy-Aware Medical Language Model Adaptation

Medical question answering spans specialties and clinical operations that may benefit from different adaptation directions. We propose ARBOR, a parameter-efficient method that selects rank-one components from a shared low-rank basis for each question. An additive gate combines question representations, specialty tags,...

Guang-Yuan Dong, Zi-Wei Hong, Xue-Hao Zhou et al. · 0 citations
#small language model Preprint Oct 2026

Behavior Pack Optimization for Video MLLM Post-Training

Video multimodal large language models (MLLMs) keep climbing video question answering benchmarks, yet shuffling the frames, masking the segment that supports the answer, or occluding the target object barely changes their predictions. The accuracy rests on appearance and language priors, not on the temporal evidence th...

Zhaolu Kang, Shi-Yu Liu, Tai-Long Luo et al. · 0 citations
Preprint Aug 2026

When Images Look Right and Retrieve Wrong: Coverage-Guided Cross-Scale Re-Indexing for Knowledge-Faithful Generative Perception

CERES is proposed, a closed-loop multimodal indexing framework that builds a three-level semantic pyramid, mines implicit concepts via a co-occurrence-aware router, performs scale-routed cross-attention into a lightweight U-Net generator, and verifies coverage by re-indexing the generated image with the same frozen VLM...

Guang-Yuan Dong, Chuang Liu, Hao-Yu Wang et al. · 3 citations
#computer vision Preprint Aug 2026

When Generated Images Look Right and Retrieve Wrong: Coverage-Guided Cross-Scale Re-Indexing for Knowledge-Faithful Generative Perception

Multimodal information systems increasingly route generated visual content back through the same vision-language index that informed its production, so the output must remain retrievable by the queries it was meant to serve. When the scene contains entities at vastly different scales, existing language-guided generator...

Guangyuan Dong, Chuang Liu, Yangchen Zeng et al. · 0 citations
Preprint Aug 2026

COMET: Contrastive Motion-Enhanced Temporal Reasoning for Video Multimodal Large Language Models

COMET is a temporally grounded framework that systematically strengthens video MLLMs through explicit temporal representation, appearance-motion fusion, and direction-aware optimization and achieves consistent overall improvements with a pronounced motion-temporal bias.

Cheng-Hua Zhu, Zhaolu Kang, Qifan Shi et al. · 1 citation

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