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Web-based Pseudo Relevance Feedback for Microblog Retrieval.

机译：基于Web的微相关检索伪相关反馈。

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摘要

This paper presents the experiments and results for the QCRI participation in the TREC Microblog track 2012. In this year, we apply a query expansion approach for improving the retrieval results in microblog search. Our approach performs web-search with the original query to get web results appeared at the same period of the query; then it extracts the webpage title of the first web result and uses it as an expansion to the original query before applying microblog search. Our results show a significant improvement to the baseline and significantly better results than the median result achieved in the track. We also report one run in the filtering task that applies straight forward technique for retrieval score threshold selection.

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