All journals of a certain subject are arranged in descending order according to the impact factors of the previous year, and then divided into 4 journals (25% each) on average.
They are:
1.Q 1 .
2.Q2 .
3.Q3 .
4.Q4 .
The division method of China Academy of Sciences:
Regional magazine:
Top 5% of the three-year average impact factor of various periodicals.
The second district magazine: the first 6% ~ 20%.
Journals in three regions: the first 2 1% ~ 50%.
Periodicals in four regions: post-5 1% ~ 100%.
SIC gave a positive evaluation:
On February 9, 2008, the statistical results released by China Institute of Science and Technology Information showed that in 2007, the number of scientific papers included in SCI in China reached 94,800, an increase of 33.5% over 2006, accounting for 7.5% of the world share, ranking third in the world, second only to the United States and Britain.
SCI is the abbreviation of American Science Citation Index, and its full name is Science Citation Index. It was founded in 196 1, which was based on the citation thought put forward by modern information scientist Engne Garfield) 1953.
As far as itself is concerned, the most important role of SCI is to help scientific and technical personnel obtain the required literature information. This is also the main intention of editing the index of the Ministry.
The advantage of SCI is the citation function. Here, readers can quickly know whether an author's paper has been cited by others, and the development process of a subject can be understood through the number of citations. In addition, we can learn the latest information about the development of science and technology by using SCI, such as whether there are comments on a certain subject, whether a certain theory has been confirmed, whether a certain work has been expanded, whether a certain method has been improved, whether a certain formulation is established, whether a certain concept is innovative, and so on. Therefore, SCI also has the function of reflecting the quality and academic level of scientific papers. [3]
These advantages of SCI are very helpful for scientific and technological workers to consult the latest literature, track the international academic frontier, establish scientific research projects and keep abreast of international trends in specific research projects.
In the late 1980s, Nanjing University took the lead in introducing SCI into the scientific research evaluation system, which, in a sense, opened the quantitative era of scientific research evaluation in China. This incident, together with the establishment of 1986 National Natural Science Foundation and the introduction of peer review mechanism in which peer experts decide the allocation of scientific funds through democratic decision-making, shows that the evaluation of research institutions and researchers in China is mainly based on administrative means, and the evaluation results are reflected in the form of administrative level, and the administrative evaluation stage has ended.
According to Academician Qu Qinyue, then president of Nanjing University, there were two main reasons: First, there were various unhealthy tendencies in domestic academic circles at that time, and there was a lack of an objective evaluation standard; Second, there are few domestic experts in some majors, and international peer review is unrealistic. The purpose of introducing SCI is to guide researchers to pay attention to publishing papers in international academic journals with quantitative indicators and improve the academic competitiveness of schools.
Nanjing University achieved remarkable results at that time. In 1990s, the number of SCI papers of Nanjing University ranked first in China for many years. 1995 10, the famous American magazine Science introduced this practice of Nanjing University in its special issue of science in China.
At that time, social integrity was generally lacking, and scientific research evaluation was mixed with subjective factors such as human feelings. Because of its relatively objective evaluation standard and relatively detached international "identity", SCI was quickly regarded as a scientific research evaluation standard to avoid the influence of human factors as much as possible, and gradually gained an authoritative position. It can be said that the development of natural science research in China in recent 20 years is also a process in which SCI has taken root and flourished in China.