Abstract: A cross-citation method is used to cluster 8305 journals in science, social science and art & humanities in Web of Science. An existing “expert” journal classification system SOOI is compared with the clustering structure, where the “coincidence” of the two schemes is defined as “subject core”, and the “difference” is “subject periphery”. All the subject cores form the nodes of the structure of science network, presenting the divergence of knowledge and the diversity of subjects. The subject peripheries present the trend of subject splitting, inter-crossing, convergence, method transplantation, and the interaction between theoretic subjects and applied subjects.

摘要： 摘要：应用基于期刊互引分析的聚类算法对Web of Science中自然科学、社会科学与人文艺术领域八千余种期刊进行聚类分析，将期刊聚类结果与SOOI “专家”分类体系作对比分析，将二者结构的一致部分定义为“学科内核”，其余部分则为“学科外围”。所有学科内核形成了科学结构之网的网上纽结，展示了科学知识的差异性和学科的多样性。学科外围则展现了学科的分化、不同学科的交叉与融合、理论的渗透和方法的移植，以及理论学科和应用学科的相互作用等结构特征。

关键词: 期刊, 互引聚类, 科学结构