论文部分内容阅读
针对科学知识网络的演化规律及动力问题,建立了科学知识网络的演化模型.模型构建了基于局域世界的增长网络,通过引入跨领域交叉连接、度择优连接和时间优先连接三种连接机制以反映科学知识的集聚和交叉、继承和发展的关系.其中跨领域交叉既形成一定集聚拓扑结构又满足学科知识交叉引用的要求,度择优机制保证对经典科学理论的继承,时间优先机制则促使对最新知识的吸收和发展.数理分析和实验模拟表明度择优的作用是全局性的,而时间优先连接机制的作用是局部的,模型的拓扑特征与实际统计具有较好的一致性.
In view of the evolution law and motive force of scientific knowledge network, this paper establishes an evolutionary model of scientific knowledge network.The model constructs a growth network based on the local world, and introduces three kinds of connection mechanisms: cross-domain cross-connection, selective priority connection and time priority connection Which reflects the gathering of science knowledge and the relationship of crossover, inheritance and development, in which cross-domain crossover not only forms a certain gathering topology but also satisfies the requirement of cross-reference of subject knowledge, selects superior mechanism to ensure the inheritance of classical scientific theory, and time priority mechanism promotes Absorption and development of the latest knowledge.Mathematical analysis and experimental simulation show that the function of degree preference is global while the role of time priority connection mechanism is local and the topological features of the model are in good agreement with the actual statistics.