Evaluation of Query Expansion Using MeSH in PubMed.

Evaluation of Query Expansion Using MeSH in PubMed.
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DOI:
10.1007/s10791-008-9074-8
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发表时间:
2009
期刊:
Information retrieval
影响因子:
--
通讯作者:
Wilbur WJ
Wilbur WJ
中科院分区:
其他
文献类型:
--
作者:
Lu Z;Kim W;Wilbur WJ

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本文研究了在PubMed中使用MeSH®的有效性,通过其自动查询扩展过程:自动术语映射(ATM)。我们基于2006年和2007年TREC基因组学跟踪中使用的64个主题和约160,000篇MEDLINE®引文的集合进行布尔搜索。对于每个主题,我们首先通过从问题中选择关键字来自动构造查询。接下来,每个查询由ATM扩展,ATM为查询中的术语分配不同的搜索标签。三个搜索标签:扩展后选择[MeSH术语]、[文本词]和[所有字段]进行研究,因为它们都使用了索引MEDLINE引文的MeSH字段。此外,我们表征了两种不同的机制,其中使用的MeSH字段。将扩展后使用MeSH的检索结果与仅基于MEDLINE标题和摘要中的单词的检索结果进行比较。聚集检索性能评估使用F-措施和平均秩精度。实验结果表明,在PubMed中使用MeSH进行查询扩展通常可以提高检索性能,但在现实情况下,这种改进可能不会影响最终PubMed用户。
This paper investigates the effectiveness of using MeSH® in PubMed through its automatic query expansion process: Automatic Term Mapping (ATM). We run Boolean searches based on a collection of 64 topics and about 160,000 MEDLINE® citations used in the 2006 and 2007 TREC Genomics Tracks. For each topic, we first automatically construct a query by selecting keywords from the question. Next, each query is expanded by ATM, which assigns different search tags to terms in the query. Three search tags: [MeSH Terms], [Text Words], and [All Fields] are chosen to be studied after expansion because they all make use of the MeSH field of indexed MEDLINE citations. Furthermore, we characterize the two different mechanisms by which the MeSH field is used. Retrieval results using MeSH after expansion are compared to those solely based on the words in MEDLINE title and abstracts. The aggregate retrieval performance is assessed using both F-measure and mean rank precision. Experimental results suggest that query expansion using MeSH in PubMed can generally improve retrieval performance, but the improvement may not affect end PubMed users in realistic situations.
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