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Wei Dai

3 papers indexed

openalex2026-07-24

GSIM-PLUS: A Gap-Filled Global Monthly Streamflow Dataset for 1995–2015

Mingrui Chen, Bin Yong, Xinzhi Xu, Weihong Liao, Haichen Li, J Zhang, et al.

Abstract. Global monthly streamflow observations are fundamental for understanding changes in the water cycle, supporting large-sample hydrology, and informing water-resources assessments. However, currently available open station archives still suffer from substantial limitation…

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arxivcs.CV2026-07-20

SAMRI-3D: Adapting SAM2 for 3D MRI Segmentation with Global Volume Tokens

Zhao Wang, Wei Dai, Hongfu Sun, Craig Engstrom, Shekhar S. Chandra

Foundation models such as Segment Anything Model 2 (SAM2) have transformed natural-image and video segmentation, and recent work has begun adapting them to medical imaging. These adaptations, however, are largely general-purpose models that treat MRI as one modality among many; l…

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arxivcs.AIcs.CV2026-07-18

Constraint-Anchored Reasoning Traces

Zehua Cheng, Wei Dai, Jiahao Sun

Autoregressive multimodal large language models (MLLMs) suffer from error snowballing: a single incorrect inference early in a chainof-thought (CoT) trace corrupts all downstream reasoning. We find that in state-of-the-art open-source MLLMs, once the first error occurs, the reaso…

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