Are ei and sci in the same grade?

The differences between EI and SCI are as follows:

1, the creation is different: SCI was founded by institute for scientific information in Philadelphia, USA, and it is a citation database1961+0 founded and published by institute for scientific information (ISI); EI is the oldest large-scale comprehensive retrieval tool founded by the American Society of Engineers in 1884.

2. Different functions: SCI is used for scientific statistics and evaluation; The function of EI is to consult the comprehensive information retrieval publications in the field of engineering technology.

3. Different attributes: SCI favors natural science, biology and medicine, while EI favors mechanical engineering, electromechanical engineering, ship engineering and manufacturing technology.

4. Different publication time: SCI publishes six issues every year, and now there are six volumes A, B, C, D, E and F in each issue; EI is published every month 1 issue.

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