First, the influencing factors.
This is an internationally accepted periodical evaluation index, which was put forward by E. Garfield in 1972. Because it is a relative statistic, it can fairly evaluate and handle various periodicals. Generally speaking, the greater the impact factor of a journal, the greater its academic influence and role.
Second, the cited half-life.
It refers to how long the newer half of the total number of citations was published in that year. Citation half-life is an index to measure the aging speed of periodicals, which is usually not aimed at a single document or a group of documents, but at the sum of documents in a certain discipline or professional field.
Third, the diffusion factor.
This is an academic index used to evaluate the influence of periodicals, showing the spread range of total cited frequency. The specific meaning is the number of periodicals involved in each citation of 100 times in that year. Diffusion factor = number of journals involved in total cited frequency × 100/ total cited frequency.
Fourth, annual indicators.
This is an index of the immediate response rate of a periodical, which mainly describes the situation that the papers published in that year were cited in that year. The specific algorithm is: annual index = cited times of published papers in the current year/total number of published papers in the current year.
Periodicals and magazines:
A periodical, also known as a magazine, refers to a periodical publication composed of works on different topics written by many authors. Periodicals and magazines, also known as serial publications, have a fixed title, which is in the order of expectation, volume number or year and month, and the contents of each issue are generally not repeated.
Periodicals are pamphlets formed during strikes, strikes or wars. This time-sensitive handbook, similar to a newspaper, takes into account more detailed comments. So a new kind of media came into being under such special reasons. One of the earliest journals was the Scholar's Magazine published in Amsterdam in 1665 65438+ 10.
At first, periodicals and newspapers were similar in form and easily confused. Later, newspapers gradually tended to publish timely news, while periodicals devoted themselves to novels, travel notes and entertaining articles, and the differences in content became more and more obvious. Formally, the newspaper's layout is getting bigger and bigger, with three or five feet, folded in half, and the periodical is bound on the cover, which becomes the form of books.