Papers by Qingfa Xiao
Topic-DPR: Topic-based Prompts for Dense Passage Retrieval (2023.findings-emnlp)
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| Challenge: | Prior research focused on optimizing a single prompt as a continuous prompt, but this approach leads to a semantic space collapse, preventing differentiation between relevant and irrelevant passages. |
| Approach: | They propose a dense passage retrieval model that uses topic-based prompts and propose 'positive and negative sampling strategies' to boost dense retrieval efficiency. |
| Outcome: | The proposed model surpasses state-of-the-art retrieval techniques and improves space uniformity. |