Sci is an internationally renowned authoritative academic retrieval tool, and the retrieved contents include academic journals and various professional documents, which meet the standards all over the world. Therefore, sci contains many journals, but sci also has a certain professional focus, and sci focuses on science majors, so the journals and documents of science majors are the main contents of sci retrieval.
Sci can be used to retrieve important information of academic achievements of science majors, such as mathematics, physics, chemistry, astronomy, biology, medicine, agricultural science, computer science, materials science and so on. The main form is periodicals, but sci is not limited to periodicals, but also can retrieve some academic conferences and patents.
Among the periodicals retrieved by sci, we need to remind everyone that special issues, supplements and conference collections with limited recognition in China can also be retrieved in sci. So, are the special issues, supplements and conference collections in sci recognized in China? In sci, general special issues will be searched in full text, but the search types are different.
Generally speaking, it is a treatise, and the probability that supplements are retrieved is much smaller, and most of them are not retrieved. If it is retrieved, the retrieval type is conference document type.
Therefore, there are many types of sci journals, and the scope involved is still very wide. Authors should search for suitable journals according to their own publishing needs, and pay more attention when using sci to retrieve documents.
The official department of SCI:
According to the impact factors, all journals are mainly divided into four regions, namely Q 1 region, Q2 region, Q3 region and Q4 region, each accounting for 25%. That is to say, Q 1 is the top 25% of journals with impact factors, and Q4 is the bottom 25%. The quality of periodicals in Q 1 region is the highest, while that in Q4 region is the lowest.