全球学术会议交流的时空演化及其影响因素

Knowledge exchange at international academic conferences is an important function emerging from the globalization of science and technology and the evolution of global innovation networks, and its spatio- temporal complexity has become an emerging theme in human economic geography. The spatio- temporal evolution pattern of knowledge exchange at global academic conferences from 2000 to 2019 and its affecting elements are depicted from spatio- temporal multiple scales by integrating big data mining, mathematical statistics, GIS spatial analysis, and spatial measurement methods. The research found that: Firstly, the knowledge exchange at global academic conferences follows the "downturn- recovery- boom-decline" mid-cycle pattern, and the inter-month variation forms a double-peak structure in June and September; the knowledge exchange fields are concentrated in the "Pasteur Quadrant," and application- oriented basic research like computer science, electrical & electronic engineering, control science, materials science, and communication science becomes the core frontier in these fields. Secondly, the exchange of academic conferences globally takes the form of a polycentric structure with three hubs, numerous sub- centers, and clusters concentrating in North America, Western Europe, and East and Southeast Asia. This structure demonstrates a duality of path locking and path creation, adhering to the law of "resource- economy" oriented location selection. Thirdly, different levels of knowledge exchange at global academic conferences cities are developing, and the knowledge exchange fields are heavily concentrated in the three major disciplines of computer science, electrical & electronic engineering, and physics. These three disciplines converge with the global "turn to applied science," and there is also significant heterogeneity in the type of "the scale concentration and disciplinary dominance" relationship in these cities. Finally, there are notable differences in the drivers of knowledge exchange at global academic conferences between cities in developed and developing countries, with the knowledge exchange at global academic conferences not only being closely related to its embeddedness but also being fueled by a combination of improved exchange environments, lower exchange costs, and increased academic prestige.