摘要
半衰期是衡量文献老化的重要标准,对于学科半衰期的研究有助于揭示学科研究的时效特性。文章侧重于学科半衰期这一概念,以化学学科为分析对象,在CNKI数据库中以中图分类号为检索条件获取了该学科的相关数据,按学科分类号重新分类后,计算了化学各子学科的引用半衰期和被引半衰期,通过主要子学科文献老化分析,揭示了我国化学研究中文献老化的影响因素。
Half-life is an important criterion for measuring literature obsolescence so that study of discipline half-life helps to discover the aging characteristics. Choosing chemistry as the object of analysis, this article places emphasis on discipline half-life. Based on CLC number, we retrieve the related statistics of chemistry in CNKI database and compute the every citing half-life and cited half-life for sub-disciplines in chemistry after reclassifying the statistics by PACS. Through the analysis of literature obsolescence of the main sub-disciplines, this article discovers the influence of literature obsolescence in chemistry.
出处
《图书与情报》
CSSCI
北大核心
2014年第4期61-66,共6页
Library & Information
关键词
学科半衰期
化学
引用半衰期
被引半衰期
文献计量学
引文分析
discipline half-life
chemistry
citing half-life
cited half-life
bibliometrics
citation analysis
