Exploiting query reformulations for web search result diversification
Exploiting query reformulations for web search result diversification
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DOI：
10.1145/1772690.1772780
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发表时间：
2010-04
影响因子：
4.5
通讯作者：
Rodrygo L. T. Santos;Craig Macdonald;I. Ounis
中科院分区：
文献类型：
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作者：
Rodrygo L. T. Santos;Craig Macdonald;I. Ounis
当Web用户的底层信息需求没有从初始查询中明确指定时，一种有效的方法是使为该查询检索的结果多样化。在这篇文章中，我们介绍了一种新的概率框架，用于Web搜索结果多样化，它显式地考虑了与未指定查询相关的各个方面。特别是，我们通过估计给定文档满足每个未覆盖方面的程度以及作为一个整体对不同方面的满足程度来使文档排名多样化。我们在TREC 2009年网络轨道多样性任务的背景下，对我们的框架进行了彻底的评估。此外，我们利用三大Web搜索引擎(WSE)提供的查询重构作为发现不同查询方面的方法。与文献中最先进的多元化方法相比，结果证明了我们框架的有效性。此外，通过模拟官方TREC数据的上界查询重写机制，我们得出了关于不同WSE生成的查询重写在促进多样性方面的有效性的有用见解。
When a Web user's underlying information need is not clearly specified from the initial query, an effective approach is to diversify the results retrieved for this query. In this paper, we introduce a novel probabilistic framework for Web search result diversification, which explicitly accounts for the various aspects associated to an underspecified query. In particular, we diversify a document ranking by estimating how well a given document satisfies each uncovered aspect and the extent to which different aspects are satisfied by the ranking as a whole. We thoroughly evaluate our framework in the context of the diversity task of the TREC 2009 Web track. Moreover, we exploit query reformulations provided by three major Web search engines (WSEs) as a means to uncover different query aspects. The results attest the effectiveness of our framework when compared to state-of-the-art diversification approaches in the literature. Additionally, by simulating an upper-bound query reformulation mechanism from official TREC data, we draw useful insights regarding the effectiveness of the query reformulations generated by the different WSEs in promoting diversity.