SCI (Science Citation Index) is an international academic database, which contains high-quality research results in the global natural and social sciences. In order to facilitate retrieval and evaluation, SCI ranks all journals according to their impact factors. According to the level of impact factors, we divide journals into four grades, namely: 1 zone, zone 2, zone 3 and zone 4.
Journals in the region refer to the journals with the highest impact factors, and are generally considered as the top research achievements in this field. Being able to publish papers in regional journals shows that your research work has reached the international leading level. In addition, journals in a field often have a high citation rate, which means that your research results will greatly promote the progress of the whole field.
Compared with the journals in the first district, the journals in the second district have lower impact factors, but they still have a higher academic level. Usually, the journals in the second district are considered as the best in the academic field, and the papers published in these journals also have high influence. If you want to gain a certain popularity in a certain field, it will be a good choice to publish it in the second district journal.
Although the impact factors of journals in the three regions are relatively low, it does not mean that their academic value is necessarily lower than that in the other two regions. In fact, many three-zone periodicals still have high popularity and influence in specific fields. If you want to publish a paper, but you are worried about fierce competition, then three-zone journals may be a more practical choice.
Four-zone journals usually refer to the journals with the lowest impact factors, and their published research results may be insufficient in some aspects. However, this does not mean that the four-zone periodicals are worthless. In fact, some four-zone journals may focus on a specific field or problem, providing unique perspectives and inspiration for related research.
Main influence
Based on Bradford's theory of document dispersion and Garfield's theory of citation analysis, the scientific citation index evaluates academic journals and scientific research achievements in many aspects by counting the cited frequency of papers.
So as to judge the performance of scientific research output of a country or region, scientific research units and individuals and reflect their academic level in the world. Therefore, SCI is an internationally recognized scientific and technological literature retrieval tool worthy of reference.
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.
Reference to the above content: Baidu Encyclopedia-Science Citation Index