2. 研究工具 CiteSpace是美国德雷赛尔大学（Drexel U

2. The research tool <br><br>CiteSpace is a software developed by Professor Chaomei Chen and his team at Drexel University in the United States to identify and display new trends and new developments in scientific development. It can show the development trend and trend of a discipline or knowledge domain in a certain period, and form the evolution process of several frontier research fields. Its design concept comes from Kuhn’s scientific development theory, Price’s scientific frontier theory, the structural hole theory of social network analysis, and the theory of discrete and reorganized knowledge units. The operating mechanism is based on the theory of co-citation analysis and pathfinding network algorithms. Scientific measurement of literature with knowledge domain as the object, the implicit and complex relationships between knowledge units or knowledge groups such as structure, network, evolution or derivation are presented in the form of graph visualization, in order to achieve an intuitive analysis of the potential dynamics of the evolution of disciplines. And scientific predictions at the forefront of subject development.

Research tools.<br><br>CiteSpace is a software developed by a team of researchers at Drexel University in the United States that identifies and displays new trends and developments in science in the scientific literature. It can show the trend and trend of the development of a discipline or knowledge field in a certain period of time, and form the evolution course of several frontier areas of research. Its design concept comes from Kuhn's scientific development theory, Price's scientific frontier theory, the structural hole theory of social network analysis, the discrete and reorganization theory of knowledge unit, the operating mechanism is based on co-introduction analysis theory and path-finding network algorithm, scientific measurement of literature with knowledge domain as the object, and the hidden complex relationship between knowledge unit or knowledge group is presented in the form of map visualization, in order to achieve the visual analysis and scientific prediction of the potential dynamic mechanism of discipline evolution.

2. Research tools<br>CiteSpace is a software developed by Professor Chen Chaomei and his team of Drexel University in the United States, which is used to identify and display new trends and trends of scientific development in scientific literature. It can show the development trend and trend of a discipline or knowledge domain in a certain period, and form the evolution process of several research frontier fields. Its design concept comes from Kuhn's scientific development theory, price's scientific frontier theory, social network analysis's structural hole theory, and knowledge unit's discretization and reorganization theory. Its operation mechanism is based on CO citation analysis theory and path finding network algorithm, taking the knowledge domain as the object to carry on the scientific measurement to the literature, and make the structure, network, evolution or derivation between knowledge units or knowledge groups In order to intuitively analyze the potential dynamic mechanism of discipline evolution and scientifically predict the frontier of discipline development, the implicit and complex relationships are presented in the form of graph visualization.<br>