This means that this journal is considered as one of the journals with a ranking between 20% and 50% in this discipline.

The second area is the periodical next to the first area.

Sci area is the highest level of scientific research in this major.

Sci Zone 1 is the top international journal, and Zone 1 refers to the top five percent of the three-year average impact factor of various journals, which is equivalent to the international champion in the field of sports, representing that the scientific research level of the publishing house has reached the highest level of this major.

Sci is the most important large-scale database in the contemporary world, ranking first among the six famous international retrieval systems. It is not only an important retrieval reference book, but also an important basis for evaluating scientific research achievements.

Sci division is based on JCR division and China Academy of Sciences division.

1, JCR is divided according to the impact factor (IF value), and all journals of a certain subject are arranged in descending order according to the impact factor of the previous year, and then divided into four parts (25% each) on average, namely Q 1, Q2, Q3 and Q4.

2. The zoning method of China Academy of Sciences: the first area journals: the top 5% of the three-year average impact factors of various journals, the second area journals: the top 6%~20%, the third area journals: the top 21%~100%, and the fourth area journals: the last 51%.

Science (same as science)

SCI is the abbreviation of American Science Citation Index, which was founded in 196 1. It was founded according to the citation thought put forward by Garfield, a modern information scientist, in 1953. Today Garfield is still one of the editors of SCI. SCI was published by ISI in institute for scientific information, USA. It's bimonthly. In addition to publishing SCI, ISI also has an online database SCISEARCH. ISTP is also published by it.