Author

Chunyu Liu

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Preprint Oct 2026

Frozen in a Frame: The Velocity Blind Spot in JEPA World Models

Joint-embedding predictive architectures (JEPAs) for world modeling train an encoder so a predictor maps a current embedding and action to the next frame's embedding, always from a single rendered frame. This has a structural blind spot: a renderer without motion blur draws a scene from configuration alone, so a single...

Ting-He Zhang, Chun-Yu Liu, Y. Liu et al. · 0 citations

#artificial intelligence Preprint Sep 2026

JustQuant: You Don't Need Smoothing, SVD, or Rotation for 4-Bit Activation Quantization

JustQuant is proposed, a simple yet effective framework that moves the complexity of low-bit quantization from deployment-time operators into the training process and introduces Theseus QAD, a quantization-aware distillation method that progressively applies multi-level supervision, analogous to the gradual replacement...

Kai-Cheng Yang, Kai-Sen Yang, Chun-Yu Liu et al. · 0 citations

#natural language process... Jul 2026

Understanding Is Done Early: A Depth Division of Labor in Large Language Models and Its Use for Unbounded-Context Memory

These results show that long-context memory can be organized along the layer axis, not only the token axis, and expose both the benefits of bounded retrieval and its in-window compression tax.

Han-Lin Liu, Xuan Qi, Chunyu Liu et al. · arXiv.org · 0 citations