Papers by Haofeng Wang
Utility-Oriented Visual Evidence Selection for Multimodal Retrieval-Augmented Generation (2026.acl-long)
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| Challenge: | Existing methods for multimodal retrieval-augmented generation rely on semantic relevance or surface-level similarity, which are often misaligned with the actual utility of visual evidence for downstream reasoning. |
| Approach: | They propose a latent notion of evidence usefulness and propose 'surrogate-accelerated' framework that efficiently estimates evidence utility using lightweight multimodal models. |
| Outcome: | The proposed framework outperforms state-of-the-art models while achieving substantial reductions in computational cost. |
Exploring Hybrid Question Answering via Program-based Prompting (2024.acl-long)
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| Challenge: | Existing approaches to question answering over heterogeneous data are limited due to large scale of information and organic coupling of heterogenous data. |
| Approach: | They propose a program-based prompting framework for hybrid question answering tasks . it integrates various functions to perform hybrid information-seeking over data . |
| Outcome: | The proposed framework surpasses baseline systems and achieves the best performance under the fewshot settings. |