MEDLINE CD-ROM光盘中副主题词对主题词查全率影响的探讨

The Research of Retrieval Results Affected by Subheadings to Headings in MEDLINE CD-ROM

我们将MeSH主题词抽样输入MEDLINECD～ROM光盘进行实验性检索，每个主题词分别采用两种方式。即“自由”方式和“allSubheadings（含全部副主题词文献）”方式输入检索，发现前者的检索结果均高出后者，从而探明了二者之间的最佳检索方法，尤其是探明了副主题词对主题词查全率的影响。

We input MeSH headings samples and start an experimental search. Two methods areused, one is 'Free' and the other 'All Subheadings'. It comes out that morearticles are found byusing 'Free' method. Based on this experiment, we discuss what is the best retrieval method, andespecially explain the influence of subheadings on retrieval results.