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利用JCR~统计数据,对2005-2014年国外临床医学相关学科的被引半衰期和引用半衰期变化进行分析发现,国外临床医学学科半衰期呈逐年增长趋势,文献老化速度变慢,学科发展趋于稳定,半衰期与学科特点关联密切,外科学等技术型学科半衰期长于内科学,传统学科半衰期长于成长阶段的新兴学科,被引半衰期和引用半衰期存在一定程度的正相关。
Using JCR ~ statistical data, we analyzed the cited half-life and quoted half-life changes of clinical medicine from 2005 to 2014 in foreign countries. The half-life of clinical medicine in foreign countries showed an increasing trend year by year. The aging of the literature slowed down and the discipline development tended to be stable , The half-life is closely related to the characteristics of the subject. The half-life of technical subjects such as surgery is longer than that of internal medicine. The traditional subjects have a longer half-life than the emerging ones. The half-life of cited subjects and the reference half-life have a certain degree of positive correlation.