SCI partition is divided into jcr partition and Chinese Academy of Sciences partition.

1, divided by jcr

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

2. According to the data of China Academy of Sciences.

Regional journals: the top 5% of the three-year average impact factor of various journals;

The second district magazine: the first 6%-20%;

Three-area periodicals: the first 21%-50%;

Periodicals in four districts: Post-51%-100%;

In several regions of sci, the influencing factors are the first, second, third and fourth regions from high to low. The first field has the highest gold content and influencing factors, but it has the highest requirements for publishing SCI papers. The requirements of Zone 3 and Zone 4 are lower than those of Zone 1 and Zone 2. Authors who publish sci papers for the first time can publish sci papers first, and then publish sci 1 zone and zone 2 as needed.