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Chen Zhang

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#natural language process... Preprint Sep 2026

InsightChain: Optimized Chain-of-Insight Analytics for LLM-driven Data Visualization

This work presents InsightChain, a four-stage visualization prompting pipeline that emulates expert analytical workflows, together with VG-COPRO, a vision-guided automatic prompt optimization (APO) method adapted to jointly optimize such multi-stage, executable pipelines.

Han-Ya Sun, Chen Zhang, Sheng Liang et al. · 0 citations
#artificial intelligence Preprint Mar 2026

Train at Moving Edge: Online-Verified Prompt Selection for Efficient RL Training of Large Reasoning Model

This work proposes HIVE (History-Informed and online-VErified prompt selection), a dual-stage framework for data-efficient RL that utilizes historical reward trajectories for coarse selection and employs prompt entropy as a real-time proxy to prune instances with stale utility.

Jiahao Wu, Ning Lu, Sheng-Cai Liu et al. · 12 citations
Preprint Aug 2026

AsymSpec: Context-Asymmetric Speculative Decoding for Agentic LLMs

AsymSpec, an asymmetric speculative decoding framework that breaks this symmetry: a lightweight drafter reads the full input while the large verifier operates on the compressed view, is proposed, showing that asymmetric context access yields substantial gains precisely when compression discards critical reasoning signa...

Sheng Liang, Yong-Yue Zhang, Nathanael Brian et al. · 1 citation

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