科技文献是科学研究的基础,展示文献中主题的演化过程有助于科研人员把握研究的脉络.针对某领域的科技文献,以构建时序主题链的方式来展现主题随时间变化的事实.为此,提出了主题间转移概率的计算方法和时序主题链的构建方法.实证研究选定国内管理科学领域三个核心期刊在2000-2011年间发表的4244篇论文进行实验,结果表明,时序主题链可以有效地展示主题随时间变化的过程,并能揭示主题演化过程中不同主题间的隐含关系.此外,通过分析时序主题链中的结构特征,还可揭示不同主题间的交叉融合特性.
Scientific literature is the foundation of scientific research for scholars. Showing topic evolution process with time in the liter- ature can help researchers to understand rules or routes for the scientific study. For the scientific literature from the specified field, the temporal topic chain can be used to reveal the fact that topics vary with time. In the paper, a method for calculating the defined transi- tion probability between topics and constructing temporal topic chains is proposed. The empirical study has been conducted on the arti- cles published from 2000 to 2011 in 3 authoritative Chinese journals in the field of management science. The results show that a tempo- ral topic chain can effectively expose how topics change over time and also reveal some latent relationships between topics during the topic evolution process. Besides, characteristics of intersection or combination between topics can be shown by analyzing structural characters of temporal topic chains.