Whether the SCI impact factor is high or low is better

Generally speaking, the higher the impact factor, the greater the influence of the journal. That is, the better!

The impact factor (IF) is Thomson Reuters.

Thomson Reuters). That is, the total number of citations in the reporting year (jcr year) of the journal published in the previous two years divided by the total number of citations published in the journal in the two years. This is an internationally accepted journal evaluation index.

Impact factor has become an internationally used journal evaluation index, which is not only an index to measure the usefulness and visibility of journals, but also an important indicator to measure the academic level and even the quality of journals. The impact factor is a relative statistic.

Academic Journal Impact Factor.

impact factor) refers to the average citation rate of a journal in the past two years, that is, the average number of citations in the year of evaluation of the journal's publication in the previous two years.

It is expressed by the formula as:

Impact factor = the number of citations published in the journal in the previous 2 years in the 3rd year The total number of citations published in the journal in the past 2 years.

From its definition, it can be seen that the three determinants of the impact factor are time (2 years), total number (the total number of times the journal has been published in 2 consecutive years), and number of citations (the total number of times the above ** has been cited in the 3rd year).

Impact factor is not the most objective criterion for evaluating the impact of a journal. Generally speaking, the higher the impact factor, the greater the influence of the journal. For some comprehensive or large research fields, the citation rate is relatively high because of the wide range of research fields.

Impact factor (IF) refers to the frequency of citations of articles in a journal in a specific year or period, and is an important indicator to measure the impact of academic journals, founded by Eugene Garfield, the founder of the Institute for Scientific Information (ISI) in the United States, in the 1960s, and has since brought a series of major innovations to the development of bibliometrics.

Impact factor is an internationally accepted journal evaluation index, because it is a relative statistic, so it can evaluate and treat all kinds of journals fairly. In general, the larger the journal impact factor, the greater its academic influence and role.

The higher the impact factor of a journal, that is, the higher the citation rate of the literature it publishes, which on the one hand indicates that the research results reported in these publications have great influence, and on the other hand, it also reflects the high academic level of the journal.

The SCI Impact Factor, also known as the IF value (IF), is a data item in the JCR (Journal Citation Report) of the Institute for Scientific Information (ISI) in the United States.

Explanation of the calculation method of SCI impact factor by Youzhu Medicine: the sum of the number of citations of the journal in the two years before the year of publication The total number of articles published in the journal in the previous two years (for example, if a journal published 181 articles in 1996 and 1997, and was cited 210 times in 1998, the impact factor is 210 181, and generally speaking, the citation rate of the impact factor 1 table is quite high).

If the SCI impact factor is greater than 2, it is considered high. Although the impact factor is only directly related to the number of citations and the number of citations, in fact, it is closely related to many factors. There are five main factors that determine the size of the impact factor:

1) Factors, such as the publication lag, length, type and number of collaborators.

2) Journal factors, such as journal size (number of publications), type, etc.

3) Discipline factors, such as the number of journals in different disciplines, the average number of references, and the half-life of citations, will have an impact on the journal's impact factor and total citation frequency.

4) Search system factors, such as the journals participating in the statistics**, the statistical range of citation entries, etc.

5) The impact of the celebrity effect.

Introduce. The impact factor is the sum of the number of citations in a journal's Chinese chapter divided by the total number of articles in the journal. But this number is an average, and the problem with it is that the average does not reflect the citations of every article.

If a journal has only two articles, and one article has 500 citations and the other article has 10 citations, then the impact factor reflects a number of 255 averages of both.

Therefore, a journal with a high impact factor can only indicate that it has multiple articles that have been cited many times, but it does not mean that every article it publishes is highly cited.

According to the data, the journal impact factor calculated by Thomson Reuters was originally used to help librarians determine which journals to buy, and is not an indicator of the scientific quality of research**. In other words, it is okay for the impact factor to be used to judge a journal, but it is not meaningful to use it to judge ** and extend it to judge scientists.

If it is the first author, then 10 points are very good, the treatise is very powerful, and the level is very high

The Science Citation Index (SCI) was founded in 1957 by the Institute for Scientific Information (ISI) in Philadelphia, USA, and is a citation database founded and published by the Institute of Scientific Information (ISI) in 1961.

SCI (Science Citation Index), EI (Engineering Index) and ISTP (Science and Technology Conference Proceedings Index) are the world's three most famous scientific and technological literature retrieval systems, and are internationally recognized as the main retrieval tools for scientific statistics and scientific evaluation, among which SCI is the most important, and the founder is Eugene Garfield (September 16, 1925 February 26, 2017).

Citation and source item: The reference of an article is called a citation, and the article is called a document. Periodicals or monograph series that publish ** literature are called ** publications (source publications).

Look at the authors, what category to look at, whether the monograph is meta or review, and see which division the journal belongs to in the Chinese Academy of Sciences. If it's the first author, then 10 points is very good.

sci**Impact factorRepresents the level of ordinary.

1. In many cases, the impact factor is the key to selecting a journal, and the level of the journal is usually located according to the size of the impact factor. Generally, those with an impact factor of less than 5 are in SCI journals.

It is considered an ordinary journal, and about 5 to 10 are relatively good journals.

2. In the basic case, the author publishes**, and the search is selected to select a journal with an impact factor of about 5, if it is higher than 10, it is very remarkable, whether the impact factor is high is to be relatively compared, in the same professional and range of journals, greater than 2 is considered high, greater than 1 can be considered relatively high, and in most cases we send it is a few tenths of a day.

3. Magazines with high impact factor represent the higher influence of its journals, in many fields of SCI journals, the journals are ranked according to the impact factor, and the level of the impact factor of the journals ranked in the top 30% of the total number represents the quality of academic journals.

Calculation formula. The formula is: ifu = (x(s,t) y(s,t)).

For example, the calculation of the impact factor of a journal in 2005; Articles in 2004 have been cited in 2005: 48 ; Number of articles published in 2004: 187;

176 =（48+128）；The total number of articles published in this journal from 2003 to 2004: 341 = (187+154); The 2005 Journal's Impact IF is = 176 341).

The above content refers to the Encyclopedia-SCI Impact Factor.

How to look at the impact factor of SCI::

1. Method 1, SCI journal.

The catalog will be updated every year, and after the update, relevant personnel will publish the latest journal catalog on the Internet, and you can change to the latest SCI journal catalog to view the journal impact factor through search.

Note: SCI journals are divided into Chinese Academy of Sciences.

partitions and JCR partitions. Among them, the division of the Chinese Academy of Sciences is updated twice a year, which is around June and December; The JCR partition is updated once a year around June.

2. Method 2: If you have a specific SCI journal, you can also directly consult the journal of the journal to learn about the latest impact factor of the journal.

3. Method 3: Web of Science platform search. The premise of searching on the platform must be to purchase the platform's search service. Otherwise, it is not possible to query the journal impact factor.

Of course, if the organization has purchased related services, it can directly go through the organization's intranet.

Access the ** to retrieve.

The SCI journal impact factor represents the academic level of the SCI journal, so the way to query the SCI journal impact factor must be mastered. The higher the gold content of SCI journals with high impact factors in the same field, the more difficult it is to submit, so we should carefully choose the journal according to our own quality when choosing a journal.

sciImpact factor14 is considered high.

In general, impact factor >1 indicates a high citation rate. The higher the impact factor, the better, because it directly represents your ** influence in the industry and how much authority it represents. The score of CI has also become an if score, if = the number of citations in the previous two years, the number of articles included in the previous two years, and it should be clear at a glance when you see the formula.

Of course, the higher the score, the more difficult it is to publish, and the higher the authority.

SCI can query the impact factor of the Chinese journals in the bank, and you can use the "Comprehensive Citation Report of Chinese Academic Journals" jointly launched by the Electronic Journal of China Academic Journals (CD-ROM Edition) and the China Center for Scientific Bibliometrics and Evaluation

Editor-in-Chief of Markham Kun, Science Press.

The impact factor of SCI is generally published in June of each year and is reported by Thomson Reuters.

Calculation method:The total number of citations of the journal in the two years preceding the year of publication The total number of articles published in the journal in the previous two years.

For example, the calculation of the impact factor of a journal in 2005; Articles in 2004 have been cited in 2005: 48 ; Number of articles published in 2004: 187;The number of citations of the 2003 article in 2005:

128；The number of articles published in this journal in 2003: 154;

The total number of citations of the articles in 2003-2004 in 2005 is: 176 = (48 + 128); The total number of articles published in this journal from 2003 to 2004: 341 = (187+154); The 2005 Journal's Impact IF is = 176 341).

Publication of SCI ** role.

1. SCI (Scientific Citation Index) is a citation index journal published by the Institute of Scientific Information (ISI) in the United States, which has far-reaching influence on the world, and is an important way for China to communicate with international science, and is also the main channel for international peers to understand us.

2. The publication of SCI can show the strength of China's basic research to the world and improve China's status in the world's scientific community.

3. The number of published sci and the citation rate are the internationally accepted standards for evaluating the level of basic research results. It is an important indicator for recruitment, promotion, assessment and awards.