文档介绍：信息检索流程(以期刊为例) 信息检索流程(以期刊为例) 课题 选择检索词(限定词、同义词) 初步拟定检索式并导入数据库调整检索策略再次拟定检索式(考虑查全、查准率)并导入数据库命中结果(题录形式) 阅读单篇摘要 批量下载摘要索取全文( 中文、外文) Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. ,转换为检索的最小单元。例1:检索“妇女吸烟与肺癌的关系研究”相关文献。直接切分: 妇女|吸烟|与|肺癌|的|关系|研究注意:当词切分后将失去原来的意思时,不应再切分,即必须注意保持意义的完整。如“中国科学院”、“电子邮件”不可再切分。检索词选择技巧检索词选择技巧-1 -1 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. : ?虚词(如介词、连词、副词等) , ?使用频率较低的词, ?专指性太高、过分宽泛的词?过分具体的限定词?不能表达课题实质的高频词?存在蕴含关系可以合并的词检索词选择技巧-1 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 英语或汉语中都有许多虚词,不能作为检索词。如:汉语中“的、地、得、了”等助词英语中的 a about also and any as at be between by both for some so not this with 等介词或冠词等检索词选择技巧-1 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 例2:检索“中国非常规天然气工业的发展前景研究”方面的相关文献。进行拆分以后, 工业、发展、前景、研究这四个自由词具有一定的检索意义,但是由于或者是意义过于宽泛、或者是不能表达课题实质、或者是存在蕴含关系的原因,没有必要全部作为检索词,根据需要可以保留 1-2 个作为检索词。检索词选择技巧-1 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Pr