Concept Based vs. Pseudo Relevance Feedback Performance Evaluation for   Information Retrieval System
  This article evaluates the performance of two techniques for query reformulation in a system for information retrieval, namely, the concept based and the pseudo relevance feedback reformulation. The experiments performed on a corpus of Arabic text have allowed us to compare the contribution of these two reformulation techniques in improving the performance of an information retrieval system for Arabic texts. 
Mohammed El Amine Abderrahim
cs.IR cs.CL