《文摘索引型数据库.ppt

#11 children AND asthma AND drug therapy 10813 #10 Add Search ((child[MeSH Terms]) AND asthma[MeSH Terms]) AND drug therapy[Text Word] 8573 01:38:37 #7 Add Search (child[MeSH Terms] OR child[All Fields] OR children[All Fields]) AND (asthma[MeSH Terms] OR asthma[All Fields]) AND (drug therapy[Subheading] OR drug therapy[All Fields] OR drug therapy[MeSH Terms]) 10531 01 #18AddSearch (Child[Mesh]) AND Asthma/drug therapy[Mesh]8117 主题词与自由词区别 主题词：又称叙词，在标引和检索中用以表达文献主题的规范化的词或词组。 主题词表示的是概念，概念由语词表达的，但是概念和语词之间并不是一一对应的。 自由词：关键词、文本词、款目词。表示的字面。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. MeSH的特性 动态性 唯一性 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. MeSH Database检索步骤 1.输入查找的主题词 2.找到所需主题词，直接点击词的链接 3.选择与主题词对应的副主题词表（检索范围，参考树状结构表） 4.添加到检索框中 5.在PubMed中检索 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 检索步骤 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. PubMed几种检索方法的选择 基本检索 高级检索 MeSH Database检索 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 举例：儿童哮喘的药物治疗方面文献 基本检索 1.检索表达式： children asthma drug therapy 2.直接输入检索框中，进行检索 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 检索过程（Search details） (child[MeSH Terms] OR child[All Fields] OR children[All Fields]) AND (asthma[MeSH Terms] OR asthma[All Fields]) AND (drug therapy[Subheading] OR (drug[All Fields] AND therapy[All Fields]) OR drug t