Semanticscholar 检索结果来自于期刊、学术会议资料或者是学术机构的文献。Semantic Scholar uses groundbreaking AI and engineering to understand the semantics of scientific literature to help Scholars discover relevant research.
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DOAJ 收录的OA期刊数量非常多,属于目前最好的的OA期刊目录网站。DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.