The full name of SCI is ScienceCitationIndex, which is a world-famous periodical literature retrieval tool published in institute for scientific information, USA. Its publishing forms include printed periodicals, CD-ROM versions and online databases, as well as network-based databases published on the Internet. SCI contains about 3,500 core journals published all over the world in the fields of mathematics, science, chemistry, agriculture, forestry, medicine, life sciences, astronomy, geography, environment, materials and engineering technology. ISI selects periodical sources through its strict periodical selection criteria and evaluation procedures, with a slight increase or decrease every year, so that the literature collected by SCI can comprehensively cover the most important and influential research achievements in the world.

Core journals are the main journals of a certain discipline. Generally speaking, it refers to a professional periodical with a large amount of professional information and high quality, which can represent the development level of professional disciplines and is valued by readers of this discipline. Relevant experts have found that the actual distribution of literature information sources has the effect of core journals, that is, a large number of scientific papers in a professional world are concentrated in a few scientific journals.

To polish SCI papers, you can choose Wenhua's. Every article has been polished by at least two editors, reviewed by one editor and readjusted, and there will be no quality problems. Each round of revision will be returned to scholars in strict accordance with the prescribed time. If there is any accident in the paper, communicate with scholars in time.