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arXiv 2207.04656cs.IRcs.CL
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基于主题粒度文本表示的文档检索模型

Topic-Grained Text Representation-based Model for Document Retrieval

National University of Defense Technology(国防科技大学)

Mengxue Du, Shasha Li, Jie Yu, Jun Ma, Bin Ji, Huijun Liu, Wuhang Lin, Zibo Yi

摘要:

文档检索使用户能够准确、快速地找到所需的文档。为了满足检索效率的要求,流行的深度神经方法采用基于表示的匹配范式,通过离线预存储文档表示来节省在线匹配时间。然而,上面的范例消耗了大量的本地存储空间,特别是当将文档存储为单词粒度的表示时。为了解决这个问题,我们提出了TGTR,一个主题粒度的文本表示为基础的文档检索模型。TGTR采用基于表示的匹配模式,离线存储文档表示以保证检索效率,而采用新颖的主题粒度表示而不是传统的词粒度表示,大大降低了存储需求。实验结果表明,与词粒度基线相比,TGTR在检索准确率方面始终与TREC CAR和MS MARCO竞争,但它所需的存储空间不到它们所需的1/10。此外,TGTR在检索精度方面压倒性地超过了全球粒度基线。

英文摘要:

Document retrieval enables users to find their required documents accurately and quickly. To satisfy the requirement of retrieval efficiency, prevalent deep neural methods adopt a representation-based matching paradigm, which saves online matching time by pre-storing document representations offline. However, the above paradigm consumes vast local storage space, especially when storing the document as word-grained representations. To tackle this, we present TGTR, a Topic-Grained Text Representation-based Model for document retrieval. Following the representation-based matching paradigm, TGTR stores the document representations offline to ensure retrieval efficiency, whereas it significantly reduces the storage requirements by using novel topicgrained representations rather than traditional word-grained. Experimental results demonstrate that compared to word-grained baselines, TGTR is consistently competitive with them on TREC CAR and MS MARCO in terms of retrieval accuracy, but it requires less than 1/10 of the storage space required by them. Moreover, TGTR overwhelmingly surpasses global-grained baselines in terms of retrieval accuracy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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