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以4个全文外文期刊数据库Elsevier、Springer、EBSCOhost和JohnWiley为例,运用丰富度指数(S)、Shannon多样性指数(H)和Pielou均匀度指数(J)等评估和比较几个数据库的信息量。分析表明,EBSCOhost中ASP的刊种丰富度(S)和主题丰富度(S1)在几个数据库中最高,而H和J值最低;在信息指数与用户使用率之间的关系中,分析表明Elsevier数据库的H和J值最高,其用户访问量和全文下载量最多,性价比最高。研究结果可为图书馆了解数据库提供新视角。
Taking the four full-text foreign language periodical databases Elsevier, Springer, EBSCOhost and John Wiley as examples, the information of several databases is evaluated and compared using the index of abundance (S), Shannon’s index of diversity (H) and Pielou’s index of uniformity (J) . The analysis shows that the coverage abundance (S) and subject richness (S1) of ASP in EBSCOhost are the highest in several databases and the lowest in H and J; in the relationship between information index and user usage, the analysis shows The Elsevier database has the highest H and J values, with the highest number of user views and full-text downloads and the best price / performance ratio. The findings provide a new perspective for libraries to understand the database.