多位态研究主题识别及其演化路径方法研究

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.