张理 魏奇锋 顾新

摘 要：[目的/意义]面向科研合作网络中的学术社群，提出基于合作者吸收能力的知识扩散种子选择方法，以提升社群知识扩散效率，促进社群成员知识吸收。[方法/过程]运用R软件完成仿真实验。基于斯坦福大型网络数据集（SNAP）的真实科研合作网络数据，运用社团检测算法“WalkTrap”检测出学术社群。将各学术社群中合作对象吸收能力总和最大的节点作为各社群的知识扩散种子，基于此，在各社群内部实施知识扩散仿真实验，并用其余4种基于网络中心性的方法与本文方法作对比。[结果/结论]基于合作者吸收能力的种子选择方法，在网络整体知识水平、知识水平分布均匀性与扩散初期的知识增长速度等方面均优于其它4种方法，且节点吸收能力差异越大，这种优势就越突出。节点平均吸收能力越强或网络中节点平均度越大，知识扩散效率受种子选择方法的影响越小。

关键词：种子选择;知识扩散;科研合作网络;知识吸收能力;社团检测

DOI：10.3969/j.issn.1008-0821.2020.02.014

〔中图分类号〕G201 〔文献标识码〕A 〔文章编号〕1008-0821（2020）02-0122-10

A Study of Seed Selection for Knowledge Diffusion in

Scientific Collaboration Network

Zhang Li1 Wei Qifeng1* Gu Xin2

（1.Business School，Chengdu University of Technology，Chengdu 610059，China;

2.Business School，Sichuan University，Chengdu 610064，China）

Abstract：[Purpose/Significance]For the academic community in the scientific collaboration network，a method of selecting knowledge diffusion seeds based on the absorption ability of collaborators was proposed，so as to improve the diffusion efficiency of community knowledge and promote the knowledge absorption of community members.[Method/Process]R software was used to complete the simulation experiment.Based on the real scientific collaboration network data of Stanford large network dataset（SNAP），the community detection algorithm“WalkTrap”was used to detect the academic community.The node with the largest total absorption ability of collaborators in each academic community was used as the knowledge diffusion seed of each community.Based on this，knowledge diffusion simulation experiment was carried out within each community，and the other four network centrality based methods were compared with the method in this paper.[Results/Conclusion]The seed selection method based on the absorption ability of collaborators was superior to the other four methods in terms of the overall knowledge level of the network，the uniformity of knowledge level distribution and the growth rate of knowledge at the initial stage of diffusion.The greater the difference in the absorption capacity of nodes，the more prominent this advantage will be.The stronger the average absorption ability of nodes or the higher the average degree of nodes in the network，the less the influence of seed selection method on the knowledge diffusion efficiency.

Key words：seed selection;knowledge diffusion;scientific collaboration network;knowledge absorption ability;community detection

科研合作在知識生产和科学发展上发挥着重要作用，对知识创造与传播具有重要意义[1-2]。合著论文是科学家协同研究、形成研究成果的一种重要形式，也是实现知识转移的关键渠道。论文合著网络同时也是一类社交网络，其节点代表论文作者，边代表合著关系，二者共同体现了科学家之间的复杂合作关系，是一种典型的科研合作网络[3]。知识扩散是知识生产过程中的核心环节，对知识继承和创新存在重要作用与价值[4]。……