多位态研究主题识别及其演化路径方法研究

Research on the Method of Multi-position Research Themes Recognition and Evolution Path

[目的/意义]科学主题演化路径对认识科学发展过程和预测未来发展趋势具有重要的意义。鉴于现有研究将演化路径上的主题同等看待的缺陷,提出一种新的多位态科学主题识别及其演化路径方法。[方法/过程]以向心度和密度将每个时间区间的主题划分为核心-成熟型、边缘-成熟型、边缘-非成熟型和核心-非成熟型4种类型,并利用余弦相似度将不同时间区间的主题进行关联,以展示不同类型科学主题之间的动态交叉演化关系。[结果/结论]以3D打印领域文献为例,从技术发展阶段、主题识别、主题类型划分和主题演化路径4个方面对3D打印技术发展过程进行测度,结果证明该方法对科学主题识别及其演化路径展示具有较好效果。

[Purpose/significance]The evolution path of scientific themes is of great significance for understanding the process of scientific development and predicting future development trends.In view of the defect that the existing research treats the topics on the evolution path equally,a new method of multi-position scientific topic identification and its evolution path is proposed.[Method/process]This method divides the topics of each time interval into four types:core-mature,edge-mature,edge-immature,and core-immature based on centripetal degree and density,and uses cosine similarity to divide different time interval themes are related to show the dynamic cross-evolution relationship between different types of scientific themes.[Result/conclusion]Taking the literature of 3D printing as an example,the development process of 3D printing technology was measured from four aspects:technology development stage,theme recognition,theme type division and theme evolution path.The results proved that this method is effective for scientific theme recognition and its evolution path display.