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Hailun Xu

3 accepted papers

2026

CAMEL: Confidence-Gated Reflection for Reward Modeling

ICML 2026poster

Reward models play a fundamental role in aligning large language models with human preferences. Existing methods predominantly follow two paradigms: scalar discriminative preference models, which are efficient but lack interpretability, and generative judging models, which offer richer reasoning at …

Cited by 0SourceScholar
2026

FOCUS: Efficient Keyframe Selection for Long Video Understanding

ICLR 2026poster

Multimodal large language models (MLLMs) represent images and video frames as visual tokens. Scaling from single images to hour-long videos, however, inflates the token budget far beyond practical limits. Popular pipelines therefore either uniformly subsample or apply keyframe selection with retriev…

Cited by 0SourcecodeScholar
2025

Info-Coevolution: An Efficient Framework for Data Model Coevolution

ICML 2025poster

Machine learning relies heavily on data, yet the continuous growth of real-world data poses challenges for efficient dataset construction and training. A fundamental yet unsolved question is: given our current model and data, does a new data (sample/batch) need annotation/learning? Conventional appr…