从知识主体维度看，知识主体表现出不同的粒度。作者是科学知识系统中知识的

From the perspective of knowledge subjects, knowledge subjects show different granularities. The author is the producer, user and disseminator of knowledge in the scientific knowledge system. He is one of the most basic knowledge subjects and the smallest granular knowledge subject. There have been abundant researches on author cooperation, co-citation and coupling related networks. results.

From the dimension of knowledge subject, knowledge subject shows different granularity. The author is the producer, user and disseminator of knowledge in the scientific knowledge system. He is one of the most basic knowledge subjects and the knowledge subject with the smallest granularity. There have been rich achievements in the research of author cooperation, CO citation and coupling.

From the perspective of knowledge subjects, knowledge subjects show different granularity. Authors are the producers, users and disseminators of knowledge in the scientific knowledge system, one of the most basic knowledge subjects, and also the knowledge subjects with the smallest granularity. The research on the related networks such as author cooperation, co-citation and coupling has achieved rich results.