- Monica Rogati, Yiming Yang. 2001. CMU PRF using a Comparable Corpus. Abstract: We applied a PRF (Pseudo-Relevance Feedback) system, for both the monolingual task and the German(->English task. We focused on the effects of extracting a comparable corpus from the given newspaper data; our corpus doubled the average precision when used together with the provided parallel corpus. The PRF performance was lower for the queries with few relevant documents. We also examined the effects of the PRF first-step retrieval in the source language half of the parallel corpus vs. the entire document collection .
