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Junyuan Shang

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Preprint Aug 2026

From Intent to Evidence: Policy-Steered Multi-Strategy Retrieval for Long-Video Agents

Existing long-video agents acquire evidence through one uniform behavior, ignoring whether the required evidence is concentrated, requires broad occurrence coverage, or must discriminate competing hypotheses---which can cause failure before substantive reasoning begins. Prescribing a fine-grained solution procedure for...

Can-Can Zhang, Bao-Feng Zhang, Xiao-Tian Han et al. · 0 citations
Preprint Aug 2026

Aggregating Visual Information with Optimal Transport for VideoLM Token Compression

Video language models process videos as dense visual-token sequences with substantial representational redundancy. Compressing these sequences is therefore essential for reducing the visual-token burden on language-model decoding. The central challenge is to preserve visual information dispersed across frames under suc...

Wen-Ti Yin, Xiao-Tian Han, Jun-Yuan Shang et al. · 0 citations
Preprint Aug 2026

Autonomy-of-Heads: Data-Free Sparse Attention from Frozen Query-Key Geometry

Long-context LLM inference is bottlenecked by quadratic attention computation and growing KV-cache costs. Existing sparse attention and KV-compression methods typically decide which tokens or heads to preserve from runtime attention scores, observation windows, calibration prompts, or learned gates, making head diagnos...

YeHan Yang, Jun-Yuan Shang, Yang Li et al. · 0 citations

Revisiting Lossy Verification in Speculative Decoding: Mechanisms, Trade-offs, and Failure Modes

This work presents a principled analysis of the distributions induced by lossy verification methods, and shows that many seemingly distinct approaches differ only superficially and can be unified into two categories: truncation-based verification and collaborative verification.

Tian-Yu Wang, Yuxuan Zhou, Heng Li et al. · 0 citations
Preprint Aug 2026

Memory Augmentation Unlocks Efficient Chain-of-Thought Reasoning

Memory-Augmented Compression is proposed, a training-free framework that constructs reusable reasoning memories from historical traces and retrieves them as prefill-side scaffolds to compensate for information lost during compression.

Si-Meng Zhang, Yi-Long Chen, Wenyuan Zhang et al. · 0 citations

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