No matter jcr branch or Chinese Academy of Sciences, first-class journals are internationally renowned academic journals. These periodicals are difficult to publish, and not everyone can publish them. First-class journals are not suitable for different authors to publish. Generally speaking, first-class journals can be published by some experts and scholars, famous university professors, or some influential scientific researchers in their major.
The periodicals in the second district are second only to those in the first district, but the number of domestic authors in the second district is more. At present, some domestic standards explicitly require the publication of two or more periodicals, so two-zone periodicals are the first choice for many domestic authors. The publication of periodicals in the second district is slightly less difficult, but it depends on specific disciplines and periodicals. The general rule is that the periodicals in the second district are easier than those in the first district.
Sci journal type:
Sci focuses on science majors, so periodicals and documents of science majors are the main contents of sci retrieval. Sci can be used to retrieve important information of academic achievements of science majors, such as mathematics, physics, chemistry, astronomy, biology, medicine, agricultural science, computer science, materials science and so on. The main form is periodicals, but sci is not limited to periodicals, but also can retrieve some academic conferences and patents.
Among the periodicals retrieved by sci, it should be reminded that special issues, supplements and conference collections with limited recognition in China can also be retrieved in sci.