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Xiang Chen

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#artificial intelligence Preprint Oct 2026

Mind the Execution Gap: Action-Semantic Mismatch in World-Model Control

World-model controllers rely on action-conditioned dynamics for prediction and planning, yet real control systems often execute commands asynchronously due to communication delay, packet loss, reordering, and actuator buffering. We study how asynchronous execution changes the action semantics assumed within world-model...

Sheng-Tao Wen, Xiang Chen, Yu Tian et al. · 0 citations
#artificial intelligence Preprint Aug 2026

Decoupling Knowledge and Privacy: Post-Task Self-Distillation Replay for LLM Continual Learning

Privacy-preserving continual learning (PPCL) must reduce the reproduction of sensitive content while retaining useful knowledge across sequential tasks. Formal privacy guarantees characterize randomized mechanisms, whereas operational output control concerns whether a trained model selectively reduces the likelihood of...

Sheng-Tao Wen, Yun-Ying Yang, Xiang Chen et al. · 0 citations
Preprint Aug 2026

VARM-Bench: Benchmarking Verifiable Structured Reasoning in Chinese Abusive Speech Moderation

VARM-Bench provides an auditable and reproducible benchmark for evaluating verifiable moderation rationales in Chinese abusive-speech moderation, and shows that strong label-level performance can conceal substantial errors in complete moderation records.

Mingyu Yuan, Sheng-Tao Wen, Ling-Bing Guo et al. · 0 citations
Preprint Aug 2026

Rethinking Normalization Placement for LLMs: Post-Norm under Curriculum Depth Growing

Pre-norm is the standard normalization placement in modern Transformers because it facilitates joint optimization of full-depth models. We ask whether this preference persists when depth is introduced through a curriculum. In curriculum depth growth, each appended block receives the boundary representation produced by...

Sheng Ren, Yadong Wang, Naiqiang Tan et al. · 0 citations

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