摘要
从免费全文的源期刊被JCR收录的情况、提供免费全文的比例、时滞、出版国家以及出版语言等方面对PubMed2009年收录的免费期刊进行统计和分析。统计结果表明,免费全文具有较高的使用价值,但存在时效性差和比例偏低的问题,尤其是部分高影响力期刊的免费全文比例更低,提示科研工作者不应忽略PubMed提供的免费全文文献。
Free journals covered in 2009 PubMed were analyzed in terms of their free full-texts, delayed publication, publication countries and language. The results showed that free full-texts were of high utilization value with a limited period and a small number of free full texts, especially those in journals with a high influence power, indicating that scientists should not neglect the free full-texts covered in PubMed.
出处
《中华医学图书情报杂志》
CAS
2010年第9期79-80,F0003,共3页
Chinese Journal of Medical Library and Information Science
