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学术性信息收集中的 特种文献检索. 张 进 图书馆信息咨询部 020-85281054 2013 年 5 月 [email protected]. 信息检索的基本要求. 查全率 Precision Ratio 查准率 Recall Ratio. 如何保证文献资料的查全与查准. 检索资源. 检索技术. 检索词. 我们通常是如何选择检索资源的 ?. Baidu, Google? SCI? Elsevier CNKI ? ……??. 检索资源选择的原则. 专业性原则 专业性数据库 综合性数据库 文献类型原则 - PowerPoint PPT Presentation
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020-85281054 [email protected]
Precision Ratio
Recall Ratio
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SCI?
Elsevier
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