1, the range of SCI: the range of SCI is greater than that of SCIE.

2.SCIE scope: SCIE belongs to the periphery of SCI and is selected from SCI academic journals, so the scope of SCIE is smaller than that of SCI.

Second, the overview of the two is different:

1.SCI Overview: SCI papers are published in journals included in SCI (Science Citation Index). At present, a small number of researchers mistakenly believe that SCI is a periodical, which has been cited by Nanjing University and has become a publication for academic evaluation, rewards and punishments of major universities and scientific research institutions.

2. Overview of SCIE: SCIE(SCI Expanded) is the English abbreviation of SCI, which is an expanded version of the scientific citation index (that is, the online version), mainly including the most influential and important journals in the fields of natural science and engineering technology, including more than 2,000 peripheral journals.

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With its unique citation approach and comprehensive scientific data, scientific citation index ranks journals and papers through the statistics of a large number of citations, and then obtains quantitative indicators such as impact factors, citation frequency and real-time index of a journal and paper in a certain discipline. The high frequency of citation shows that this paper has a great influence in its research field and has attracted the attention of international peers with high academic level.

Because the papers included in SCI are mainly in the basic research field of natural science, SCI indicators are mainly suitable for evaluating the achievements of basic research, and the main achievements of basic research are academic papers. Therefore, how to evaluate the basic research results is often simplified as how to evaluate the influence of the contents contained in the paper on the progress of scientific knowledge.