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Zhiyuan Shi

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#machine learning Preprint Oct 2026

S-Space: Exploring Spatial Workspace in Multimodal Language Models

Multimodal language models (MLLMs) exhibit promising spatial reasoning capabilities, yet the internal mechanisms supporting them remain poorly understood. We uncover S-Space, a linear representation subspace in which object-token representations encode continuous coordinates along horizontal, vertical, and distance axe...

Zhi-Yuan Shi, Xiang Li, Xing-Zhuo Guo et al. · 0 citations
Preprint Aug 2026

HarnessEval-W: Agentifying the Evaluation of Visual Worlds

This work introduces HarnessEval-W, an agentified evaluation pipeline that brings the harness paradigm from the LLM ecosystem to world model benchmarking, and applies HarnessEval-W to 18 representative world models over 330 evaluation cases.

Wei-Liang Chen, Haowen Sun, Jun Gao et al. · 3 citations
#computer vision Preprint Aug 2026

GEB-Bench: Abstract Structures Told in Many Voices

Evaluating twelve open and proprietary models, it is found that abstraction failure is lawful, and the central finding is a gap between recognition and cross-voice mapping: models identify a structure within one voice far better than they carry it across voices; every model pays this tax, and mapping strong enough to n...

Tong Zhang, Zhiyuan Shi, Yun Peng et al. · 0 citations

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