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Pengjie Zhao

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#machine learning Preprint Sep 2026

CSC: Calibrated Simplicity for Conflict-Aware Social Bot Detection in the LLM Era

Social bot detection is essential for protecting online platforms from misinformation amplification, coordinated manipulation, and distorted public discourse. However, large language models have made social bots much harder to detect from text alone because semantic camouflage is now cheap, fluent, and scalable. The re...

Yi-Peng Qian, Peng-Jie Zhao, Chao-Xi Niu · 0 citations
Preprint Aug 2026

Uncovering and Mitigating Positional Blind Spots in Vision-Language-Action Models

This paper proposes a two-stage black-box framework to uncover and mitigate Positional Blind Spots, and evaluates its framework on five state-of-the-art VLA policies across two benchmarks, and finds that PBS are pervasive and spatially concentrated in all of them.

Dongdong An, Peng-Jie Zhao, Yi-Hao Huang et al. · 1 citation

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