Implicit Feedback and Document Filtering for Retrieval Over Query Sessions
نویسندگان
چکیده
We used the same Indri index of ClueWeb09 that we built and used for last year’s TREC submissions [1]. All of our queries use the Indri query language. When we did not use feedback, we used a simple keyword query, resulting in scoring by a Dirichlet-smoothed language model. When we did use feedback, we used a weighted combination of the original query and weighted expansion terms derived from the feedback documents. An example is: #weight(0.8 #combine(peace corp application) 0.2 #weight(0.055 corps 0.054 peace 0.051 volunteer 0.037 peacecorp 0.035 kennedy 0.031 benefit 0.030 application 0.029 president 0.028 info )) 2.1 Implicit feedback
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