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Yi-Bo Wang

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#artificial intelligence Preprint Sep 2026

PACE: Progressive Angular-to-Norm Contrastive Embedding

Multimodal embedding models encode heterogeneous inputs into a shared embedding space, enabling efficient similarity computation across modalities and tasks. Most existing methods optimize cosine-based contrastive objectives, which promote stable training but restrict semantic compatibility to angular geometry, preclud...

Yan-Ping Li, Wei Zhou, Ya-Wen Liu et al. · 1 citation
Preprint Aug 2026

Learning Compositional Spatio-Temporal Video Grounding with Synthetic Curriculum

This work builds a synthetic data engine that leverages a spatio-temporal scene graph as a difficulty measure and casts difficulty-controlled query synthesis as a constraint programming problem, producing difficulty-graded data for both evaluation and training and proposes CurrSTVG, a curriculum reinforcement learning...

Xing-Jian Wang, Shijian Wang, Yi-Bo Wang et al. · 0 citations

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