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Di Zhang

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δ-mem: Efficient Online Memory for Large Language Models

Results show that effective memory can be realized through a compact online state directly coupled with attention computation, without full fine-tuning, backbone replacement, or explicit context extension.

Jing-Di Lei, Di Zhang, Junxian Li et al. · 10 citations
#artificial intelligence Preprint Sep 2026

Just MLPs: Efficient Visual State Reconstruction for Multimodal Language Models

This work proposes $\delta$-Vision, which replaces repeated Transformer evolution of visual tokens with lightweight low-rank adapters that construct layer-wise visual memories while preserving all visual tokens for text retrieval, and achieves higher accuracy than visual token pruning baselines at comparable or lower c...

Jing-Di Lei, Junxian Li, Di Zhang et al. · 0 citations
Jul 2026

LongStraw: Long-Context RL Beyond 2M Tokens under a Fixed GPU Budget

This work presents LongStraw, an objective-aware, architecture-aware system for resident-state virtualization, response replay, and distributed-gradient execution that bounds the live training graph by the response suffix while reusing the expensive prompt computation across the complete GRPO group.

Changhai Zhou, Kieran Liu, Yuhua Zhou et al. · 2 citations

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