基于LDA的突发事件应急管理主题热度与演化分析

Analysis on the Topic Popularity and Evolution of Emergency Management Based on LDA

【目的/意义】挖掘国内外突发事件应急管理主题,进行主题热度及演化分析,以拓宽学科交叉研究背景,推动突发事件应急管理体系建设。【方法/过程】以WOS和CNKI数据库为文献分析数据来源,基于LDA模型对不同时间窗口的文献进行主题挖掘,引入支持度确定主题热度,采用DSSM算法计算主题相似度,进一步确定主题演化路径。【结果/结论】主题热度上,国内侧重于突发事件的应急措施管理,国外则侧重于医疗应急管理的理论研究与解决;主题演化上,国内突发事件应急管理的相关主题关联度更高,而国外突发事件应急管理研究的延续性更强。【创新/局限】科学地展示出主题间演化路径及强度变化趋势,以可视化分析的角度更直观地对比国内外突发事件应急管理研究的异同关系,但定量研究相对不足。

【Purpose/significance】Excavating the domestic and foreign emergency management topic,analyzing the topic popularity and evolution.To broaden the background of cross-disciplinary research and promote the construction of emergency management sys⁃tem.【Method/process】WOS and CNKI databases are used as data sources for literature analysis.Based on the LDA model,the topic mining of literature content in different time windows is carried out.Strength Index is used to determine the topic popularity,and DSSM is used to calculate the topic similarity,and further determine the topic evolution path.【Result/conclusion】In terms of topic heat,domestic focuses on the emergency measures management of emergent events,while foreign focuses on the theoretical research and solution of medical emergency management.In terms of topic evolution,the related topics of domestic emergency management are more relevant,while the continuity of foreign emergency management research is stronger.【Innovation/limitation】Scientifically show the evolution path and intensity change trend among topics.From the perspective of visual analysis,the similarities and differences be⁃tween domestic and foreign emergency management studies are more intuitively compared.But quantitative research is relatively insuf⁃ficient.