In the field of scientometrics, the subject classification system of academic journals holds great importance. Accurate identification and classification of "multidisciplinary" journals are crucial in revealing the scientific structure and evaluating journals. Based on data from the Web of Science database from 2016 to 2020, we calculated the disciplinary diversity of journals using the paper-level subject classification system, then conducted a systematic analysis of JCR multidisciplinary journals. Studies showed that most multidisciplinary journals have high disciplinary diversity, while non-multidisciplinary journals tend to have relatively lower diversity. Some multidisciplinary journals with low disciplinary diversities may misclassify disciplines. In addition, there are inconsistencies in the diversity of journal disciplines at different granularities. Our study also visually analyzed the four types of diversity distribution tendencies of multidisciplinary journals. Moreover, ten potential multidisciplinary journals were found in non-multidisciplinary categories.

翻译：在科学计量学领域，学术期刊的学科分类体系具有重要意义。准确识别和分类"多学科"期刊，对于揭示科学结构和评价期刊至关重要。基于2016年至2020年Web of Science数据库的数据，我们利用论文级学科分类系统计算了期刊的学科多样性，随后对JCR多学科期刊进行了系统分析。研究表明，大多数多学科期刊具有较高的学科多样性，而非多学科期刊的多样性相对较低。部分低学科多样性的多学科期刊可能存在学科分类错误。此外，不同粒度下期刊学科的多样性存在不一致性。我们的研究还直观分析了多学科期刊的四种多样性分布趋势。值得注意的是，在非多学科类别中发现了十种潜在的多学科期刊。