Question 2: How are the impact factors of Chinese core journals calculated? In fact, the calculation of the impact factor does not involve the number of articles in that year.
The calculation method is as follows: the number of articles cited in the first two years of this year (the first two years) is divided by the number of articles in the previous two years;
The immediacy index is related to the number of articles in that year, and its calculation method is to divide the number of articles cited in that year by the number of articles in that year.
Question 3: How are the impact factors of magazines and periodicals generally calculated? The impact factor is calculated in years. Take the impact factor of a journal in 1992 as an example, if (1992) = A/B,
A = the number of times all articles in this journal were cited from 1990 to 199 1 in 1992;
B = the number of all articles in this journal from 1990 to 199 1.
affect
Many famous academic journals will indicate their influence factors on their websites to show their influence in the corresponding disciplines. For example, Journal of American Chemical Society, Oncogenes, etc. Major universities in Chinese mainland (such as Tsinghua, Harbin Institute of Technology and Zhejiang University) take the influence factors of academic journals as the main criteria for judging graduate students' graduation.
Question 4: What are the influencing factors of SCI for graduate students and doctors, even if they are excellent? It depends on how your school is doing. Whether SCI can be published in similar schools is a question. Some schools write dozens of papers a year, and the IF is high.
SCI generally contains more science and engineering. I study chemistry. Taking chemistry as an example, chemical papers are obviously more popular than physics. If it is less than 3, it is very general. About 5 is an excellent magazine in your small major. 10 is an excellent magazine in your whole first-level discipline. /kloc-more than 0/0 are generally review magazines, which are generally manuscripts, and it is difficult to contribute, with more than 20 copies. Master students in our college are required to have at least three articles before they can graduate, and both master students and doctors have three articles, which means that in fact, more than three articles are good. Because chemistry is a big category, the IF of professional magazines in both disciplines is generally not too high, and it is better to be around 5, for example, the organic JOC is more than 3 o'clock. The higher the impact factor, the better the magazine. JACS of American Chemical Society is 7.8, which is much less than angew 10, but it is recognized that it is more difficult than angew. It's just that some amateur judges may suffer when awarding prizes, because they may pay attention to IF.
It depends on the scientific research level of your school. If you want to win a prize, even if you are a cow pie, you can publish it to JACS level, because there are only dozens of articles in the country every year.
Question 5: How to calculate the influence factors of literature? SCI (English version of Science Citation Index) is a world-famous periodical literature retrieval tool published by institute for scientific information (ISI, website: isinet). Its publishing forms include printed periodicals, CD-ROM versions and online databases, and now it has published a web-based database on the Internet.
SCI contains about 3,500 core journals published all over the world in the fields of mathematics, science, chemistry, agriculture, forestry, medicine, life sciences, astronomy, geography, environment, materials and engineering technology. ISI selects periodical sources through its strict periodical selection criteria and evaluation procedures, with a slight increase or decrease every year, so that the literature collected by SCI can comprehensively cover the most important and influential research achievements in the world.
ISI refers to the most influential research achievements, which means that a large number of documents reporting these achievements are cited by other documents. Therefore, as a retrieval tool, SCI has set up a unique "citation index", which is contrary to the conventional practice of other retrieval tools to retrieve documents by subject or classification. That is, through the reference of the current document to the previous document, the correlation between documents and the influence of the previous document on the current document are explained.
The above characteristics of SCI make SCI not only a document retrieval tool, but also a basis for scientific research evaluation. The total number of papers collected by SCI in scientific research institutions reflects the scientific research level of the whole institution, especially the basic research; The number of papers collected and cited by SCI reflects his research ability and academic level.
In addition, ISI publishes JCR (Journal Citation Report) every year. JCR counts and calculates the citation and cited data of 4,700 journals, including 3,500 journals included in SCI, and defines the impact factors and other indicators to be reported by each journal. The impact factor of a periodical refers to the average number of citations in the previous two years. The higher the impact factor of a publication, the higher the citation rate of its published documents, which on the one hand shows that the research results reported by these documents have great influence, on the other hand, it also reflects the high academic level of the publication. Therefore, JCR has become a regular evaluation tool because of its large number of regular statistical data and calculated influencing factors. Libraries can make periodical introduction policies according to the data provided by JCR; Authors can decide the direction of submission according to the ranking of impact factors of journals.
Question 6: How to calculate the impact factor/How to calculate the impact factor (IF) is a quantitative indicator of the influence of a journal, that is, the average number of citations of each paper in a journal is actually the ratio of the number of citations of a journal by all source journals in a certain year to the number of all source papers published in the previous two years.
nk- 1+nk-2
Calculation formula: IF(k) = Nk- 1+Nk-2.
Description:
K is a certain year, Nk- 1+Nk-2 is the number of papers published in the previous two years, and the number of cited articles of Nk- 1 and Nk-2 in K year. In other words, the impact factor of a journal in 2005 is the total cited figures published in 2004 and 2003 divided by the cited figures published in 2004 and 2000.
Question 7: Where to inquire and how to calculate the real-time impact factor of sci journals Step 1: Open the ISI database of Bai Wen Library and click "Other Resources" in the blue box.
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Click the "Other Resources" button in the first step, and then click the "Journal Citation Report" button in the blue box.
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Click the "Journal Citation Report" button according to the above steps to enter the SCI impact factor query interface.
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After entering the SCI impact factor query interface, select the option in the blue box as "Search for specific journals", and then click the "Submit" button in the red box in the figure.
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After the fourth step is completed, click "View the complete list of journal titles" in the blue box.
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Click "View Full Name List of Journals" to enter the full name page of magazines, all of which are arranged in alphabetical order.
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After entering the full name page of the magazine, press "ctrl+F" and a search box will appear in the upper right corner of the page. Enter the name of the magazine you want to query in the search box. For example, the "plant cell" in this example will show the following results, and the magazine name related to your query word will be found in the blue box in the lower left corner. Copy one of them.
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After copying the name of the magazine you want to query, go back to the previous page, paste it into the blue box, and click the "Submit" button.
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Click Submit to get the impact factor of the magazine, as shown in the figure below. The blue box is the magazine name "PlantCell" you want to query, and the red box is the five-year impact factor and the current year impact factor of the magazine.
Question 8: How to use 1 minute to roughly calculate the regression method of influencing factors of a SCI magazine next year? Use spss or related software to do a regression of related factors to see those influences and the degree of influence.