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通过对《中国科技期刊引证报告》(核心板)2006年和2009年医学期刊文献计量学指标的对比分析,结果显示:非独家期刊和独家加入中国知网(清华同方数据库)的医学期刊2009年影响因子与2006年相比有大幅度提高,而独家加入万方数据的医学期刊影响因子总体水平明显下降,甚至低于全部医学期刊的整体水平;而所有期刊2009年的扩散因子也均比2006年下降。结果提示,我国医学期刊独家加入中国知网和万方数据,都将对期刊的文献计量学指标产生一定影响,独家加入万方数据影响更加明显。
Through the comparative analysis of the bibliometrics of medical journals between 2006 and 2009 of “China Sci-tech Journals Citation Report” (core board), the results show that non-exclusive journals and medical journals exclusive to ChinaNet (Tsinghua Tongfang Database) 2009 The impact factor increased significantly compared with 2006, while the overall impact of medical journals with exclusive access to Wanfang data decreased significantly, even lower than the overall level of all medical journals; all journals in 2009 also had a higher diffusion coefficient than in 2006 Year down. The results suggest that the exclusive accession of Chinese medical journals to China National Knowledge Infrastructure and Wanfang Data will have an impact on the bibliometrics of journals. It is even more obvious that the exclusive accession to Wanfang Data will have an impact.