HyDE 精读笔记Precise Zero-Shot Dense Retrieval without Relevance Labels一、论文基本信息论文标题:Precise Zero-Shot Dense Retrieval without Relevance Labels(无需相关标签的精准零样本密集检索)作者:Luyu Gao, Xueguang Ma, Jimmy Lin, Jamie Callan(卡内基梅隆大学、滑铁卢大学)年份:2022(arXiv预印本,后收录于ACL 2023)会议/期刊:ACL 2023论文链接:arXiv:2212.10496关键词:Zero-shot Retrieval, Dense Retrieval, Hypothetical Document, Instruction-tuned LM, Contrastive Learning二、研究背景2.1 领域现状与痛点在HyDE出现之前,密集检索(Dense Retrieval)领域的主流范式分