The division of sci is based on influencing factors. The top 5% is Zone 1, the top 20% is Zone 2, the top 50% is Zone 3, and the rest is Zone 4. Therefore, the journals in the second district are all journals with high impact factors, and it is reasonable that it is difficult to publish them. The main points of SCI papers are almost universal.

SCI citation index (SCI for short) is a periodical literature retrieval tool put into use by ISI on 1960. It is also a periodical published by ISI, and now it is bimonthly. The tool is operated by Ke Rui Wei 'an Company and provides online reading and downloading services, so researchers can clearly know which new articles cite a certain document, or which articles cite an author, and which articles are cited the most frequently.

SCI is an internationally recognized scientific and technological literature retrieval tool worth learning. Through the statistics of the cited frequency of papers, the academic journals and scientific research achievements are evaluated and studied in many aspects, so as to judge the performance of scientific research output of a country or region, scientific research units and individuals and reflect its international academic level.

SCI paper:

SCI papers refer to papers published in journals included in Science Citation Index. With the globalization of economy and scientific research, SCI papers are an important way of international scientific exchange, and the number of SCI papers published and the citation rate of papers are the international common standards for evaluating the level of basic research achievements.

Papers that enter SCI journals are SCI papers. SCI papers, as the name implies, are papers published in journals included in SCI. Up to now, there are still a few researchers in China who mistakenly think that SCI is a periodical. However, due to the first citation by Nanjing University, SCI has increasingly become a publication for academic evaluation, rewards and punishments of major universities and scientific research institutions.

As far as SCI papers are concerned, most domestic researchers are facing the problem of insufficient English, especially for older and more professional scientists, the content is not a problem, and English often becomes a bottleneck. SCI papers are still mysterious to most domestic scientific and technological workers, and it is difficult to publish them. Based on this, most scientific research institutions, universities and other units introduce it as an evaluation standard.