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本文运用莱姆库勒函数拟合取自BIOSIS、INSPEC和COMPENDEX中的4组数据,并用柯尔莫洛夫斯米尔诺夫检验(KS检验)进行验证,结果发现取自BIOSIS的两组数据通过了KS检验,而另两组数据未通过。但图像仍然符合布氏分布曲线。  相似文献   

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基于ISI Web of Knowledge的BIOSIS Previews数据库探析   总被引:2,自引:0,他引:2  
在分析BIOSIS Previews众多检索软件平台的基础上,重点探讨了基于ISI Web of Knowledge平台的BIOSIS Previews数据库特点及其检索方法。  相似文献   

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本文系国家自然科学基金项目:“科学信息离散分布的机理与模型研究”的第二部分。文章运用布氏区域法对采自BIOSIS、INSPEC、COMPENDEX数据库的4组原始数据进行分析,验证了布拉德福定律在现代科学技术环境下的适用性和精确性。结果发现布拉德福定律对于本项目的数据很不精确。  相似文献   

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Journal coverage is one factor that affects the retrieval of relevant information from bibliographic databases. The aims of this study were to investigate the coverage of databases for psychiatry journals, and to assess the overlap between databases. Psychiatry journals were identified using Ulrich’s International Periodicals Directory and then analysed to see which bibliographic databases indexed the most journals. A total of 213 abstracting and indexing services were listed as indexing at least one of the 977 psychiatry journals identified. The four most frequently cited databases (PsycLIT, EMBASE, BIOSIS and MEDLINE) indexed 506 (52%) of the psychiatry journals. Of these 506 journals, PsycLIT indexed 367 (73%), EMBASE 337 (67%), BIOSIS 243 (48%) and MEDLINE 236 (47%). Combining the databases with the highest yields (PsycLIT and EMBASE) increased the number of journals indexed to 461 (91%). The four databases combined accounted for 90% of all psychiatry journals found to be indexed by at least one abstracting and indexing service. More than 400 journals were not indexed at all. Variations in the overlap between PsycLIT, EMBASE, BIOSIS and MEDLINE, and the high proportion (35%) of journals indexed in only one of these four databases emphasize the importance of searching more than one or even two databases to ensure optimal coverage of the literature.  相似文献   

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西文全文数据库质量评价研究   总被引:1,自引:0,他引:1  
对我国高校图书馆订购较多、较著名的5个西文全文数据库Journals@Ovid Full Text、E1sevier Science SDOS、Springer Link、Kluwer Online、Wiley Interscience,从其期刊被SCI、EI、BIOSIS Preview、ChemPort、J—Medline等权威数据库收录的比重,影响因子、即时指数、半衰期以及影响因子的学科分布等5个方面进行比较分析和科学评价。  相似文献   

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This article is an exploration of techniques used to retrieve items in the veterinary science related literature using the MEDLINE, CAB ABSTRACTS, AGRICOLA and BIOSIS databases. The discussion is database and not vendor-specific and is directed at the medical reference librarian or information specialist currently engaged in online searching. Search aids in the form of tables are presented.  相似文献   

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对比分析了PubMed,BIOSISPreviews,EMBASE.corn3个数据库的收录情况、检索结果、关注度,为医学科研定题或立项检索时合理选择英文医学检索工具提供依据,提高外文文献的查全率。  相似文献   

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结合实践经验,举例介绍了利用OVID及Web of KnowledgeR平台检索美国BIOSIS Previews数据库的方法,并对这两个检索平台上的检索功能进行了比较分析。  相似文献   

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朱令俊 《档案与建设》2020,(2):30-34,13
数据驱动下的档案知识发现以大数据为驱动力,探索档案数据结构转变,利用数据可视化、建模、算法洞察理解档案信息资源,从档案领域中创新知识生产方式。文章立足数据背景明晰档案知识发现的概念涵义,以数据驱动为主轴解析档案知识发现的基本程式,从数据层、逻辑层、应用层、表示层构建档案知识发现的内容框架,具体阐述档案数据转型的递进过程,以数据思维、网络思维、用户思维探讨档案知识发现的实现路径,助益档案机构推动知识共享与服务。  相似文献   

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