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Author

Youjin Wang

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#artificial intelligence Preprint Aug 2026

GeoRefer-Bench: A Benchmark from Referring Pixels to Verifiable Geospatial Reasoning

Referring segmentation in overhead imagery is inherently relational: a query may ask for the buildings north of the road or the pond closest to a residential area, so the correct referent can contain one object, several objects, or none. Existing benchmarks mainly score mask overlap, which cannot verify whether a model...

Shuai Cao, Min Huang, Meng Tang et al. · 0 citations

Social-JEPA: Emergent Geometric Isomorphism

The findings reveal that predictive learning objectives impose strong regularities on representation geometry, suggesting a lightweight path to interoperability among decentralized vision systems.

Haoran Zhang, Youjin Wang, Yifu Duan et al. · 0 citations

InfoMamba: An Attention-Free Hybrid Mamba-Transformer Model

A consistency boundary analysis is presented that characterizes when diagonal short-memory SSMs can approximate causal attention and identifies structural gaps that remain and proposes InfoMamba, an attention-free hybrid architecture that consistently outperforms strong Transformer and SSM baselines.

Youjin Wang, Jiaqi Zhao, Rong Fu et al. · 0 citations
#artificial intelligence Preprint Feb 2026

ASA: Backbone-Training-Free Representation Engineering for Tool-Calling Agents

Activation Steering Adapter (ASA), a training-free, inference-time controller that performs a single-shot mid-layer intervention and targets tool domains via a router-conditioned mixture of steering vectors with a probe-guided signed gate to amplify true intent while suppressing spurious triggers is proposed.

Youjin Wang, Run Zhou, Rong Fu et al. · 4 citations · ⚡2

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