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Xiao-Yu Shen

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#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. · 0 citations

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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