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文档结构对稠密检索影响的安慰剂对照消融研究

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2026年10月8日,arXiv Information Retrieval(一手)发布一项安慰剂对照消融实验,在统一协议下测试四种文档结构处理:结构对齐分块、LLM生成的块上下文、标题路径元数据与两阶段层级检索。结果显示,真实标题路径的结构对齐块优于上下文化固定窗口(+0.022 / +0.012 cov-nDCG@10)与安慰剂(+0.010 / +0.016);朴素两阶段层级检索反而下降(-0.033 / -0.015)。该研究为文档结构是否有助于稠密检索提供了对照证据。

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Oct 8, 2026
  1. arXiv · Information Retrieval
    文档结构是否有助于稠密检索?跨两个语料库对四种机制的安慰剂对照消融实验

    一项安慰剂对照消融实验在统一协议下测试结构对齐分块、LLM 生成的块上下文、标题路径元数据与两阶段层级检索四种文档结构处理。真实标题路径的结构对齐块优于上下文化固定窗口(+0.022 / +0.012 cov-nDCG@10)与安慰剂(+0.010 / +0.016),朴素两阶段层级检索反而下降(-0.033 / -0.015)。

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