The SCI (Science Citation Index) Impact Factor is an indicator calculated by the Science Citation Index database to measure the impact of scientific journals. The impact factor is calculated in relation to the number of articles cited and the number of journals published.
The formula for calculating the impact factor is as follows:
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The specific steps are as follows:
1.Select journal and time frame: Typically, the impact factor is calculated annually and covers the number of articles published in the previous two years and the number of citations in a year.
2.Collect data: Collect all articles published by the journal in the previous two years and the number of times those articles were cited in the calculated year.
3.Calculate Impact Factor: Divide the total number of citations by the total number of articles in the previous two years to get the Impact Factor.
Note that there is some controversy in the calculation of the SCI impact factor, as it can be misused or over-interpreted. Impact factors are not the best way to measure the quality or impact of a particular article, but are more appropriate to compare the relative impact of different journals in the same field. In addition, the criteria for journal citation rates in different fields may vary, so caution should be exercised when using impact factors for comparison.
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