14 research outputs found
Simulation of within-session query variations using a text segmentation approach
We propose a generative model for automatic query refor-
mulations from an initial query using the underlying subtopic structure of top ranked retrieved documents. We address three types of query reformulations a) specialization; b) generalization; and c) drift. To test
our model we generate the three reformulation variants starting with selected fields from the TREC-8 topics as the initial queries. We use manual judgments from multiple assessors to calculate the accuracy of the reformulated query variants and observe accuracies of 65%, 82% and 69%
respectively for specialization, generalization and drift reformulations
查询推荐研究综述
查询推荐是一种提高用户搜索效率的重要技术,其核心任务是帮助用户构造有效查询并以此准确描述用户信息需求。作为当今搜索引擎的核心技术之一,查询推荐吸引了学术界和工业界的广泛关注,一直以来都是信息检索领域中重要的研究主题。本文以国内外会议、期刊发表的有关查询推荐研究的文献为对象,利用归纳总结方法,首先详细梳理了查询推荐中主流方法——基于简单共现信息的方法、基于图模型的方法以及融合多种信息的方法,然后总结评述了评测方法与指标,最后分析了未来可能的研究方向。</p