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Qingjie Zhang

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#artificial intelligence Preprint Sep 2025

Stop Before You Fail: Operational Capability Boundaries for Mitigating Unproductive Reasoning in Large Reasoning Models

Two test-time monitoring strategies are proposed: reasoning expression monitoring and hidden states monitoring, that reduce token usage by 62.7-93.6%, substantially improving efficiency and reliability while largely preserving accuracy.

Qingjie Zhang, Yujia Fu, Yang Wang et al. · 2 citations · ⚡1
#natural language process... Preprint Aug 2026

Can Released LLM Vocabularies Support Token-Level Estimation of Hidden Corpora?

Quantile-Guided Density Estimation (QGDE), which approximates this distribution with multiple quantile trends and uses local density weighting to produce token-level estimates and suggests that released tokenizer vocabularies provide a useful signal for fine-grained corpus estimation beyond coarse composition inference.

Qingjie Zhang, Xingzhang Ren, Zi-Xuan Chen et al. · 0 citations
#artificial intelligence Review Aug 2026

Auditing Chinese Web-scale Corpora via Sampled BPE Token Statistics

This work proposes Sampled-BPE, a lightweight token-level auditing pipeline that sample a small subset and train BPE tokenizer to surface polluted tokens, and releases a hierarchical Chinese web token dataset with 660k+ token records, organized as trees to support review and tracing of pollution.

Qingjie Zhang, Ziqi Tang, Jie Zhang et al. · 0 citations

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