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Xiao-Yu Shen

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#artificial intelligence Preprint Oct 2026

GeoGR: Spatial-Semantic Token Compression and Group Routing for Efficient 3D VLMs

Multi-view representations enable pretrained image and video vision-language models to understand 3D scenes, but their long visual token sequences make inference costly. Redundancy arises both from repeated observations of the same scene regions across views and from processing all visual tokens at every LLM layer, reg...

Yong-Xing Zheng, Hao Wu, Fang Li et al. · 0 citations
#artificial intelligence Preprint Oct 2026

DIAL-OPD: Learning More from Fewer Tokens in On-Policy Distillation

On-policy distillation (OPD) supervises student-generated trajectories with token-level teacher signals. Its sampled-token variant avoids the cost of full-vocabulary probabilities. Yet we find that training on fewer tokens can outperform full-token OPD, challenging the intuition that more supervision improves learning....

An-Hao Zhao, Hao-Ran Xin, Jun-Long Tong et al. · 0 citations
#natural language process... Preprint Oct 2026

Nucleus Speculative Decoding: Plausibility-Aware Verification Beyond Exact Distribution

Speculative decoding accelerates autoregressive generation by using a lightweight draft model to propose multiple tokens that are verified by a target model in parallel. However, the standard acceptance rule focuses on exact distribution correction and rejects tokens that remain highly plausible under the target model...

Shu-Hao Li, Fang-Hua Ye, Wan-Yu Lin et al. · 0 citations
#artificial intelligence Preprint Oct 2026

MWOP: Modality-aware Width-wise Operation Pruning for Efficient MLLMs

Multimodal large language models (MLLMs) incur substantial inference costs when processing long visual-textual sequences. While existing operation compression methods exploit modality-level redundancy, they largely treat computation within attention heads and shared feed-forward network (FFN) channels as unified units,...

Xu-Dong Wang, Hao Wu, Hao-Zhe Hu et al. · 1 citation

Adaptive Mass-Segmented KV Compression for Long-Context Reasoning

Extensive experiments across a diverse suite of tasks, including mathematical reasoning, code completion, open-domain QA, and sparse retrieval, demonstrate that Adaptive Mass-Segmented KV Compression consistently mitigates structural fragmentation and boosts model performance.

Junzhe Yang, Xiao-Yu Shen · 1 citation
Jul 2026

Post-Training Shifts Confidence: A Three-Stage Analysis of How SFT, RL, and OPD Shape CoT Calibration

A three-stage calibration framework that evaluates confidence before, during, and after chain-of-thought generation, corresponding to difficulty estimation, early termination, and answer aggregation finds that OPD provides the most useful pre-reasoning confidence, SFT gives the strongest online signal for early stoppin...

Shu-Hao Li, Guodong Du, An-Hao Zhao et al. · 1 citation
Preprint Jul 2026

Post-Training Shifts Confidence: A Three-Stage Analysis of How SFT, RL, and OPD Shape Pre-, Intra-, and Post-CoT Calibration

A three-stage calibration framework that evaluates confidence before, during, and after chain-of-thought generation, corresponding to difficulty estimation, early termination, and answer aggregation finds that OPD provides the most useful pre-reasoning confidence, SFT gives the strongest online signal for early stoppin...

Shuhao Li, Guodong Du, Anhao Zhao et al. · 0 citations
Jul 2026

WIDE: Boosting Adaptive LLM Inference via Token-level Dynamic Width Pruning

WIDE is presented, the first end-to-end differentiable token-level dynamic width pruning framework designed for both prefill and decode scenarios, and a pruning--kernel co-design framework that decomposes dynamic sparsity acceleration into mask reordering, hardware-agnostic block-level skipping, and hardware-dependent...

Haozhe Hu, Hao Wu, Pei-Ran Yin et al. · 1 citation

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