DomainSpecific Synonym Expansion and Validation for Biomedical Information Retrieval (MultiText Experiments for TREC 2004)

[摘要] In the domain of biomedical publications, synonyms and homonyms are omnipresent and pose a great challenge for document retrieval systems. For this year’s TREC Genomics Ad hoc Retrieval Task, we mainly addressed the problem of dealing with synonyms. We examined the impact of domainspecific knowledge on the effectiveness of query expansion and analyzed the quality of Google as a source of query expansion terms based on pseudorelevance feedback. Our results show that automatic acronym expansion, realized by querying the AcroMed database of biomed ical acronyms, almost always improves the performance of our document retrieval system. Google, on the other hand, produced results that were worse than the other, corpusbased feedback techniques we used as well in our experiments. We believe that the primary reason for Google’s bad performance in this task is

[学科分类] 社会科学、人文和艺术（综合）