学科分类

PQDD 共收录了 17618 篇论文。从论文篇数统计来看，应用科学最多，其次是生物科学，纯科学及社会科学。Biological sciences: 2070 11.7%Earth and environmental sciences: 1599 9%Health sciences: 1114 6%Pure sciences: 2051 11.6%Applied sciences: 7005 40%Psychology: 256 1.6%Communications and arts: 365 2%Education: 751 4.3%Language,literature,and linguistics: 389 2.3%Social sciences: 2018 11.5%

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