Cao Xia, Cui Lei, Huang Peng
In this paper,it randomly selected 20 out of 86 kinds of JCR journals in library and information science fieldthrough SPSS software as the data source,generated the author co-occurrence matrix through bibliographic items co-occurrence matrix builder BICOMB,mapped the co-authorship networks of authors,institutions and countries through UCINET software,analyzed the three co-authorship networks' clustering coefficient,the average distance,high frequency cooperationgroup,tested the small world characteristics,revealed the structure characteristicof the overall network,the relationship between the core academic group and the high frequency co-authorshipgroup.The results showed that the publishing quantity,the rate of cooperation papers and the scope of cooperationof the field of library and information science was increasing year by year,cooperative research had become an irreversible trend and the three co-authorship networks with characteristics of high clustering coefficient and short average distance,in line with the small world theory of complex network.It showed that the cooperation network of international library and information was highly connected,internal communication was frequent,and the information was communicated smoothly.High frequency cooperative institutions usually had certain research direction,and tended to publish their research results in the same journal.