A Survey on Query Expansion Based on Local Analysis

Query expansion has been considered as an effective technique for dealing with the fundamental issue of word mismatch in information retrieval for a long time. So far researchers solve this major problem through a wide variety of query expansion techniques. We primarily discuss the query expansion based on local analysis. It includes local feedback, local context analysis (LCA) and local clustering. What´s more, we briefly analyze the merits, demerits and other related issues among these techniques. Finally, we present some suggestions and pave the way for promising directions for future research.