基于Scopus数据的期刊地图--与ISI期刊引文报告的比较
Journal Maps on the Basis of Scopus Data: A comparison with the Journal Citation Reports of the ISI
摘要:
使用Scopus数据集(1996-2007)构建了一个聚合期刊-期刊引文的大矩阵。该矩阵可以在网络结构方面与科学信息研究所(ISI)的期刊引文报告(JCR)中包含的矩阵进行比较。由于Scopus数据库包含了大量的期刊,也涵盖了人文学科,人们会期望更丰富的地图。然而,该矩阵在这种情况下比ISI数据的情况下更稀疏。这是由于(i)Scopus涵盖的期刊数量较多,以及(ii)ISI数据库中包含的引用历史记录超过10年。当数据高度结构化时,如大型期刊的情况下,地图是可比的,尽管可能必须改变阈值(因为密度的差异)。在跨学科期刊和社会科学及人文学科期刊的情况下,新的数据库并没有增加很多ISI数据库的可能性。
英文摘要:
Using the Scopus dataset (1996-2007) a grand matrix of aggregated journal-journal citations was constructed. This matrix can be compared in terms of the network structures with the matrix contained in the Journal Citation Reports (JCR) of the Institute of Scientific Information (ISI). Since the Scopus database contains a larger number of journals and covers also the humanities, one would expect richer maps. However, the matrix is in this case sparser than in the case of the ISI data. This is due to (i) the larger number of journals covered by Scopus and (ii) the historical record of citations older than ten years contained in the ISI database. When the data is highly structured, as in the case of large journals, the maps are comparable, although one may have to vary a threshold (because of the differences in densities). In the case of interdisciplinary journals and journals in the social sciences and humanities, the new database does not add a lot to what is possible with the ISI databases.
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