“影响因素”(Impact Factor)是科技期刊的重要指标和引文测度。这个概念最初是E·加菲尔德在1955年的《科学》杂志上发表的“科学引文索引”一文中提出来的。一、E·加菲尔德“影响因素”概念的提出《期刊引用报告》实际上是一部统计期刊论文到论文之间引用和被引用关系的数据的集合。它包含有快指标(Immediacy Index)、半衰期(Half Life)、每篇论文参考文献的数量(R/P),以及“影响因素”等指标。众所周知,科技期刊载文量的大小在某种程度上将直接或间接地影响其被引频次的多寡。毫无疑问,高载文量的期刊要比低载文量的期刊的被引用的概率要大。因为现代科学技术发展迅速,因此登载最新科技成果的期刊论文的使用价值也就存在着 Impact Factor is an important indicator and citation measure for sci-tech periodicals. The concept was first proposed by E. Garfield in the 1955 Science Index, published in the “Science Citation Index.” First, the e. Garfield “influencing factors” put forward the concept of “Journal Reference Report” is actually a collection of statistical journal papers to papers cited and cited data sets. It includes the Immediacy Index, Half Life, the number of references per paper (R / P), and the “Influencing Factors” and other indicators. It is well-known that the size of a scientific journal’s essay will, to a certain extent, directly or indirectly affect the amount of citations it cites. There is no doubt that journals with high volumes of texts are more likely to be cited than journals with lower essays. Because of the rapid development of modern science and technology, the value of journal articles published in the latest scientific and technological achievements exists