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Query performance prediction for microblog search

机译：微博搜索的查询性能预测

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Query performance prediction (QPP) is the task of estimating the effectiveness of a retrieval system given a search query in the absence of any feedback from the searcher. The task has been proven to be very challenging, and thus it attracted a lot of research attention in domains like news and Web retrieval. However, search in microblogs poses new challenges for the task due to the more prevalent temporality in microblogs and the different types of information needs in such domain. In this work, we aim at studying QPP for microblog search. We conducted large-scale experiments, testing 37 state-of-the-art predictors using several types of retrieval models usually used in microblog search. Moreover, we propose a set of predictors that exhibit statistically-significant improvements over the state-of-the-art predictors with the maximum percentage of improvement reaching 55% over all studied retrieval settings. Further experimental explorations show that using expanded queries in predicting the performance of query expansion models gives much better prediction quality than using the original queries, and that the examined predictors were generally much more effective over temporal queries compared to non-temporal ones; both phenomena have never been studied in the context of microblog search before. As microblog search is considered a major step in several retrieval tasks in the domain (such as timeline generation, summarization, and question answering), improving QPP for microblog search has a high potential to help improve the effectiveness of those closely-related tasks.
机译：查询性能预测（QPP）是在没有来自搜索者任何反馈的情况下，在给定搜索查询的情况下估计检索系统有效性的任务。实践证明，该任务非常具有挑战性，因此在新闻和Web检索等领域引起了很多研究关注。然而，由于微博中的时间性更为普遍，并且在该领域中信息需求的不同类型，因此在微博中进行搜索对这项任务提出了新的挑战。在这项工作中，我们旨在研究用于微博客搜索的QPP。我们进行了大规模的实验，使用微博搜索中常用的几种类型的检索模型测试了37个最新的预测变量。此外，我们提出了一组预测器，这些预测器相对于最新的预测器具有统计学上的显着改进，在所有研究的检索设置中，最大改进百分比达到55％。进一步的实验探索表明，使用扩展查询来预测查询扩展模型的性能要比使用原始查询提供更好的预测质量，并且与非时间查询相比，所检查的预测器在时间查询上通常更有效。以前从未在微博搜索的上下文中研究过这两种现象。由于微博客搜索被认为是该领域若干检索任务（例如时间线生成，摘要和问题回答）中的重要步骤，因此改进微博搜索的QPP具有很大的潜力来帮助提高那些紧密相关的任务的效率。

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