1, the first author: in the signatures of innovative works such as scientific research papers, patents and research reports. In the case of cooperation between multiple authors, the name of the person who has made the greatest contribution to the work is usually signed first. Especially for the signature of scientific research papers, each journal has more detailed regulations; However, when the paper signature is used to evaluate professional titles, the weight of the first author is obviously heavier than that of the second and third authors, but lighter than the personal signature.
2. Impact factor: It is a data in the periodical citation report produced by Thomson Reuters. That is, the total number of citations of papers published by a journal in the first two years of the reporting year divided by the total number of papers published by the journal in these two years. This is an internationally accepted periodical evaluation index.
The impact factor has become a general index of periodical evaluation in the world. It is not only an index to measure the usefulness and exhibition of periodicals, but also an important index to measure the academic level of periodicals and even the quality of papers. The influence factor is a relative statistic.
Due to the complexity and diversity of scientific research, for example, hundreds of people sign a paper in bioinformatics. The first author refers to the person whose signature ranks first. Some articles have two or more first authors, which are called tied first authors. In this case, it is generally necessary to indicate the name of the person.
In addition, the first author is different from the correspondent and creative contribution, and the correspondent is often the most authoritative person in the field of papers.
Extended data:
The American Science Citation Index (SCI) was founded by the institute for scientific information in Philadelphia in 1957, and it is a citation database created and published by institute for scientific information (ISI)1961+0.
SCI (Science Citation Index), EI (Engineering Index) and ISTP (Science and Technology Conference Index) are three world-famous retrieval systems for scientific documents, which are internationally recognized as the main retrieval tools for scientific statistics and scientific evaluation, among which SCI is the most important.
Scientific citation index is based on Bradford's literature dispersion theory and E. Garfield's citation analysis theory. It evaluates and studies academic journals and scientific research achievements in many aspects by counting the cited frequency of papers, so as to judge the performance of scientific research output of a country or region, scientific research units and individuals and reflect its international academic level. Therefore, SCI is currently recognized as the most authoritative scientific and technological literature retrieval tool in the world.
References:
SCI_ Baidu encyclopedia