基于关键词的核心期刊主题动态可视化研究

Dynamic Visualization Research on Subject of Core Journal Based on Keywords

在图书情报学核心期刊中,研究性文章的关键词动态变化能很好地反映情报学课题的动态变化情况。选用2007-2009年情报学核心期刊Journal ofthe America Society for Information Science and Technology中研究性文章的关键词为样本,通过运用三次样条插值建立一个可视化模型来表示近年来高频关键词的累计增长数量、增长速率、增长加速率,反映高频关键词的动态变化效果,揭示情报学课题的动态变化。研究结果表明,图书情报学课题的发展是阶段性的,其发展速度不是固定不变的,而是以一种周期的状态出现;其增长的加速度,也呈现一种周期性的跳跃变化,体现现代学术的严谨性和曲折性。

In core journals of Library and Information Science, the dynamic development of keywords in research articles can reflect the dynamic development of subject of Library and Information Science very well. This paper chooses the research articles＇ index terms as samples of Journal of the America Society for Information Science and Technology which is the core journal between 2007 and 2009. The authors build a visualization model with Cubic Spline Interpolation and use the accumulated increment, accumulated speed, and accumu- lated acceleration to express the dynamic development of high frequency keywords, which also represent the dynamic development of sub- ject. The results show that the development of Library and Information Science is staged, the speed is not stable but in a form of a period- ic, at the same time the acceleration is also in a form of jumping, which represent the strict and circuitous in academic sector.