Dependency Network Based Real-Time Query Expansion

摘要

This paper presents a novel real-time query expansion method which offers expansion related to user query intention.A dependency relation network is first built by merging dependency trees of large numbers of sentences from a large-scale corpus.User queries are then expanded to verb-noun pairs or verb-attributes-noun multiple grams based on relations in the network,which is helpful to identify user intentions and to reduce search spaces.Experiments show that the proposed expansion method is not only effective in saving user inputs,but also brings significant improvement to retrieval performance.