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Xinbei Ma

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#artificial intelligence Preprint Oct 2026

PaceReasoner: Label-Free Learning to Answer Briefly from Long Reasoning

Extended chain-of-thought reasoning improves problem-solving performance but increases inference cost and latency, motivating more accurate answers with shorter reasoning. We introduce PaceReasoner, a label-free test-time reinforcement learning framework that uses a model's LONG responses to improve its SHORT-mode accu...

Chang-Guo Jia, Zhi-You Xiao, Xin-Bei Ma et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Retrieval-Driven Memory Reconsolidation for Long-Term LLM Agents

The proposed REALM framework models long-term memory as a continual lifecycle by autonomously organizing memories into a heterogeneous cognitive graph, retrieving evidence via adaptively composed graph-search atoms, and continually reconsolidating memories based on retrieval feedback.

Yuan-Yi Song, Yukai Wang, Xin-Bei Ma et al. · 2 citations
Preprint Aug 2026

UrbanGround: From Local Perception to Spatial Agency in a Real-Scale City

This paper proposes UrbanGround, the first sandbox to make this question testable in a physically constrained replica of Hong Kong built from territory-wide 3D geospatial data, and hopes it will support broader study of how far current MLLM agents can explore reliably in complex, open-ended urban environments.

Tianjie Ju, Zheng Wu, Yue-Qing Sun et al. · 2 citations

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