SCI is one of the three most famous retrieval systems in the world, which can reflect the academic level of natural science research.
SCI was founded in 196 1 by eugene garfield, director of institute for scientific information (1925-09- 15). It mainly includes the author, title, source journals, abstracts and keywords, which can not only evaluate the academic value of articles from the perspective of literature citation, but also quickly and conveniently establish a reference network for research topics. It can be used to retrieve the important academic achievements of mathematics, physics, chemistry, astronomy, biology, medicine, agricultural science, computer science, materials science and other disciplines since 1945. SCI is also regarded as an important basis for making discipline development plans and ranking academic achievements by academic circles at home and abroad.
The publication forms of SCI include printed periodicals, CD-ROMs and online databases, as well as online databases on the Internet. After more than forty years of development and improvement, it has developed from a single printing type at the beginning to a powerful electronic, integrated and networked large-scale multidisciplinary and comprehensive retrieval system.
SCI covers more than 100 disciplines, mainly involving agriculture, biology and environmental science; Engineering technology and applied science; Medicine and life sciences; Physics and chemistry; Behavioral science.
SCI divides the number of source journals into SCI and SCI-E. SCI refers to printing SCI and SCI CDE, and there are more than 3,500 source journals. SCI-E(SCI extended) is an extended library of SCI, which contains more than 6,650 source periodicals and can be searched through the international online or Internet.
ISI selects journals through its strict standards and evaluation procedures, with a slight increase or decrease every year to ensure that its literature can fully cover the most important and influential research achievements in the world. The so-called most influential research results mean that a large number of documents reporting these results are cited by other documents. 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.
SCI takes the current content (CC for short) as the data source, and there are more than 5,000 periodicals in the natural science database, including 1350 in the life science series. The engineering and computer technology series includes 1030 kinds; 990 kinds of clinical drugs were collected; 950 kinds of agricultural and biological environmental sciences; The series of physics, chemistry and earth sciences includes 900 periodicals. The coverage of each version is different. Among them, there are about 4,500 core journals published around the world in the fields of mathematics, physics, chemistry, agriculture, forestry, medicine, life sciences, astronomy, geography, environment, materials and engineering technology. The extended edition includes more than 6650 periodicals. SCI collects six or seven hundred thousand papers every year. SCI mainly extracts sci-tech periodicals and patents. Every document published in the selected journal, including papers (no code), abstracts (a), comments (b), editorial articles (e), newsletters (l), conference materials (m), patents (p), comments and bibliography (r), is extracted one by one. In particular, the reference materials attached to each document are carefully recorded and arranged according to a certain format. In terms of paper index, based on the source index, it is equipped with four citation indexes (namely, author citation index, patent citation index, primary and secondary citation index and institution citation index).
SCI has four retrieval methods. Citation index is arranged alphabetically by the first author and is used to retrieve the papers published by the author. The periodical source index is arranged according to the complete title of each paper and is used to retrieve the main contents of the paper. Subject index (Permuterm Subject Index) searches for documents related to a certain subject or a certain professional direction through title words or subject words. The CD-ROM version traces the words, phrases and short sentences in the references cited in the paper through KeyWords Plus of SCI, which expands the capacity of the printed version. The company index is arranged alphabetically by region. It can retrieve the institutions to which each paper belongs, and it can also use an institution to count the published papers. It can also be easily found in the CD-ROM version and the online version, that is, the social science citation index, which is the companion of SSCI and also the scientific information research in the United States.
It is a large-scale retrieval tool, which can be used to analyze the number of social science papers in different countries and regions in the world. 1999
In 2006, SSCI collected 1809 kinds of the most important social science journals in the world, covering anthropology, law, economics, history, geography and psychology.
Wait for 55 games. The types of documents collected include: research papers, book reviews, special discussions, editorials, autobiographies, letters, etc. Selective inclusion
More than 300 kinds of periodicals/kloc-0. SSCI's description of the scope of its journals clearly tells us that some contents in the database are duplicated with SCI, which is because there is an intersection between disciplines, and it is a natural reflection of interdisciplinary research combining social science and natural science in the literature.
In addition, SSCI generates a catalogue of documents related to social sciences from more than 3,400 natural science journals by computer, which is then reviewed by ISI editorial board and selected documents closely related to social sciences to join SSCI. Therefore, SSCI also contains a considerable number of natural science documents, and the cross relationship between them is closer.
What are the influencing factors of SCI and SCI journals?
SCI is a scientific citation index database founded by institute for scientific information (ISI) in Philadelphia, USA in 1963, and it is recognized as one of the most authoritative scientific literature retrieval tools in the world.
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. Its records include papers and citations, which cover a wide range, including books, periodical papers, conference papers, patents and other types of documents. It covers more than 100 disciplines, mainly involving the following fields: agriculture, biology and environmental science; Engineering technology and applied science; Medicine and life sciences; Physics and chemistry; Behavioral science. Therefore, SCI is an internationally recognized and widely used scientific citation index database and scientific literature retrieval tool, and the academic papers included in SCI are called "SCI papers".
As a unique retrieval tool, SCI is obviously different from CA (Chemical Abstracts), BA (Biological Abstracts), EI (Engineering Index) and s a (Scientific Abstracts). Its uniqueness lies in the introduction of the concept of "citation index". Its function is to take a document as a search clue, collect the references cited by it, track the cited situation after its publication, grasp the context of the research theme, and thus quickly find relevant research documents. Therefore, SCI objectively evaluates its journals every year, taking the total number of cited papers published in a journal in the past two years divided by the total number of papers published in this journal in the past two years as the influencing factor of this journal. The higher the influence factor, the greater the probability of being cited and the greater the influence.
From the publishing form, SCI includes printed periodicals, CD-ROM versions and online databases. 1997, ISI launched the online version of SCI database-web of science retrieval system. The expanded scientific citation index information of this retrieval system is more abundant, including more journals. At the same time, the system makes full use of the powerful power of WWW to capture the world, and the retrieval function is more powerful and the update is more timely.
According to statistics, SCI has collected 6,500 kinds of publications around the world. According to the statistical results of China's scientific papers published by China Institute of Science and Technology Information in 2004, as of September 2005, SCI has included 78 scientific journals in Chinese mainland. Compared with the previous year, the quantity and quality of scientific papers in China in 2004 increased steadily. The number of SCI papers increased by 15.2%, and the number of cited papers and times increased by 4.4% and 4.3% respectively. China's papers have been cited for several decades, rising by four places, reaching the world 14. However, there is still a big gap between China's scientific and technological level and the world's advanced level, and no subject in China has been cited to the world average. EIEi Compendex is the earliest source of engineering abstracts in the world. The index information of 500,000 abstracts added to Ei Compendex database every year comes from 565,438+000 engineering journals, conference collections and technical reports. The documents collected by Ei Compendex cover all engineering fields, of which about 22% are conference documents and 90% are in English.
Ei Company began to collect China periodicals from 1992. 1998 Ei Set up Ei China Mirror Station in Tsinghua University Library. SCI (scientific citation index)
Scientific Citation Index (SCI) is a citation database created and published by institute for scientific information (ISI)1961+0. It covers comprehensive retrieval publications in life science, clinical medicine, physical chemistry, agriculture, biology, veterinary medicine, engineering technology and so on. And it can especially reflect the academic level of natural science research. It is the most famous of the three retrieval systems in the world at present, and its collection scope is the important periodicals in the world that year. In particular, its citation index shows unique scientific reference value and occupies an important position in academic circles. Many countries and regions regard the papers collected and cited by SCI as an important index to evaluate academic level.
Engineering index
Engineering index (EI) was founded in 1884, which is a well-known comprehensive retrieval tool for engineering technology published by engineering information company. EI is published every month 1 issue, with abstracts from 13000 to 14000. Each issue is accompanied by a subject index and an author index; There is also an annual volume and an annual index every year, and the annual index also increases the author unit index. There are print (periodicals), electronic (tapes) and microfilm. EI has selected more than 3,500 periodicals in 15 languages and more than 3,500 conference proceedings, scientific reports, standards, books and other publications in dozens of countries and regions around the world. More than 654.38+600,000 articles are reported every year. The collected literature covers almost all fields of engineering technology. It has the characteristics of strong comprehensiveness, wide data sources, wide geographical coverage, large amount of reports, high quality of reports and strong authority.
ISTP (index of scientific papers)
Science and technology index. Technical conference, ISTP for short. Established in 1978. The index includes conference documents of life science, physical and chemical science, agriculture, biology and environmental science, engineering technology and applied science, including general conferences, symposiums, research conferences, seminars and conferences. Among them, the literature of engineering technology and applied science accounts for about 35%, and other related disciplines are basically the same as SCI.
Index of scientific reviews
The scientific review index is abbreviated as ISR. Founded in 1974, it has collected more than 2,700 scientific journals and more than 300 monographs from all over the world. High-quality review articles can provide important information such as the general situation of research and development, research hotspots and main directions in this discipline or a certain field, and are extremely valuable reference materials.
Citation index of Chinese social sciences
Citation Information of Social Sciences in China is a landmark project in the field of humanities and social sciences evaluation in China, which was successfully developed by Nanjing University. Scientific citation index reveals the internal relations between scientific documents from the mutual citation relationship between them. By searching and querying the scientific citation index database, we can reveal the process of application, improvement, development and revision of known theories and knowledge, and reveal the basic trend of subject research and development from an important aspect; Through the statistics and analysis of scientific citation index database, we can quantitatively evaluate the scientific research level of regions, institutions, disciplines and scholars, and provide first-hand information for the development and research of humanities and social sciences. CSSCI is commonly known as "the core periodical of Nanda Edition".
Overview of Chinese core journals
Compendium of Core Journals in China (hereinafter referred to as Compendium) edited and published by Peking University Library and Peking University Library Periodical Work Research Association. The main contents are published irregularly, with the second edition published in 1996, the 2000 edition published in 2000 and the latest edition published in 2008. The compendium includes Chinese periodicals in various disciplines such as social science and natural science. Among them, the identification of core journals is comprehensively evaluated through five indicators. An overview of Chinese core journals is what is commonly called Chinese core journals, commonly known as "Peking University Edition Core Journals".
CSCI (China Scientific Literature Database)
This is a project funded by the National Science Digital Library. Its construction goal is to establish a network-based service system for scientific and technological knowledge of Chinese sci-tech periodicals, so as to provide effective discovery and evaluation services for institutions and individual users. Combined with the full-text database openurl, a knowledge discovery, evaluation and promotion service system based on core sci-tech journals is established.
ASPT (China Bibliometric Evaluation Database)
ASPT is a bibliometric evaluation database of China's scientific literature, which is jointly established by China Academy of Sciences Bibliographic Information Center (A), Chinese Academy of Social Sciences Bibliographic Information Center (S), Peking University Library (P) and China Academic (CD-ROM Edition) Electronic Magazine (T).
China periodical full-text database
English abbreviation for China Journal Full-text Database. It is the first full-text retrieval and evaluation database of academic journals in China, which is headed by the Ministry of Education, sponsored by Tsinghua University and founded by China Academic Journals (CD-ROM Edition) Electronic Magazine. It is a modern operating platform for the production, dissemination, application, evaluation and management of knowledge information in China. Provide dynamic knowledge service for domestic and foreign readers in the form of CD-ROM and Internet, provide basic data for periodical evaluation of China Scientific Literature Metrology Evaluation Research Center, and provide periodical management data for relevant periodical management departments such as the General Administration of Press and Publication. If journals are included in these databases, it shows the authority of these journals to some extent.
CJCR (Citation Report of China Sci-tech Journals)
According to the model of JCR in the United States, combined with the specific situation in China, CJCR selected more than 1000 Chinese and English sci-tech periodicals published in China, including mathematics, physics, mechanics, chemistry, medicine and health, industrial technology, electronics and communication, computing technology, transportation, aerospace, environmental science and other disciplines. According to the citation data of source journals, more than ten evaluation indexes of sci-tech journals, such as total cited frequency, impact factor, annual index, cited half-life, regional distribution of papers, number of funded papers, and total self-citation ratio, were standardized and ranked according to their disciplines, impact factors, total cited frequency and periodical order.
China Biomedical Periodical Literature Database
It is a China medical journal database created by the Medical Library of the People's Liberation Army, and a document abstract database for hospitals, colleges, scientific research, library and information, medical and health care, medical publishing and other units. It is an important tool to retrieve the latest medical literature, which has the characteristics of large amount of literature, strong professionalism, new information, wide query channels, timely update, complete system functions, friendly user interface and convenient use. Almost all core journals, important journals and some natural science journals related to biomedicine in China are included, covering all fields of biomedicine and related fields of its marginal disciplines. CMCC is a Chinese medical literature database with the largest amount of information and the fastest transmission speed among similar products in China.
China Academy of Social Sciences (Summary of Core Journals of Humanities and Social Sciences in China)
It is a scientific research achievement completed by the Literature and Information Center of Chinese Academy of Social Sciences on the basis of years of periodical research. It takes the citation database and other large-scale literature databases with the largest number of articles in China as statistical data sources, makes comprehensive statistical analysis by using the theory and method of bibliometrics, and invites authoritative experts from various disciplines to review and objectively reflect the "academic influence" of journals. This book summarizes 344 core journals in philosophy, politics, law, economy, literature, history and other important disciplines, covering authoritative journals and excellent journals with the highest utilization rate and academic level among social science journals in China. China Academy of Social Sciences is also called "the core periodical of China Academy of Social Sciences".
Citation Report of China Sci-tech Journals (Statistical Source Journals)
According to ISI's periodical citation report mode, combined with the actual situation of periodical development in China, 1576 kinds (2004 edition) of sci-tech periodicals published in China (excluding Hong Kong, Macao and Taiwan) are identified as "statistical source periodicals of sci-tech papers in China", and the subject category is mainly natural science, which is a relatively recognized catalogue of sci-tech statistical source periodicals in China at present. Entrusted by the Ministry of Science and Technology, it has official color and high academic authority, so people are used to calling it "Statistical Source Journal" and "China Science and Technology Core Journal".
China scientific papers and citations database.
Entrusted by the Ministry of Science and Technology, China Institute of Sci-tech Information (ISTIC) began to make a statistical analysis of the number of papers published and cited by China's scientific and technological personnel at home and abroad from 1987, and established the China Sci-tech Papers and Citations Database (CSTPCD) by using the statistical data, which has been widely concerned and praised by all walks of life. Statistical source periodicals of China scientific papers are the data sources of CSTPCD. The academic quality of journals is evaluated by the Comprehensive Index Evaluation System of China Sci-tech Journals, and the scope of journals included in China Sci-tech Journals Network is adjusted every year.
CSCD (Chinese Science Citation Database)
There are nearly 1,000 kinds of Chinese and English scientific and technological core journals and excellent journals published in the fields of mathematics, physics, chemistry, biology, medicine and health, engineering technology, environmental science and management science in China, including 670 kinds of core journals and 378 kinds of extended journals. After strict screening, the source journals of the core database are authoritative and representative core journals in various disciplines. The source journals of the extended database have also undergone extensive screening, and they are all excellent journals in various disciplines in China. It has the characteristics of the oldest database building history, strong professionalism and accurate and standardized data, and is known as "SCI of China".
Chinese Academic Journal Comprehensive Evaluation Database
It is a national torch plan project and a large-scale database based on the evaluation data of China Academic Journal (CD-ROM Edition) and the special full-text database of China Journal Network. It is an analytical tool for data source statistics of core journals in China, and an important basis for the source journals of China Science Citation Database and China Humanities and Social Sciences Citation Database. The database provides the basis and statistical analysis results for periodical management department to manage and identify periodicals and other quantitative analysis of periodicals. Based on the Comprehensive Evaluation Database of Chinese Academic Journals and its statistical analysis, combined with the Outline of China Core Journals, more than 900 excellent social science journals were selected as source journals by experts from the citation database of humanities and social sciences in China, the evaluation center. The basic framework of China's periodical phalanx "Double High", "Double Award", "Double Hundred" and "Double Effect" periodicals "China's periodical phalanx" is divided into four levels, forming a pagoda-shaped structure. The first level is "double-effect" periodicals. Based on nearly 10,000 periodicals in China, more than 1000 periodicals with good social and economic benefits were selected as the basis of "China Periodical Square". The second level is "Double Hundred" periodicals. That is, 100 kinds of key journals of social sciences and 100 kinds of key journals of science and technology are produced through biennial appraisal. The number of key periodicals that enter the national "double hundred" in each session is controlled at about 200. The third level is the "double prize" periodical. It is a national periodical award and a national periodical award nomination award selected on the basis of the national "Double Hundred" key periodicals. There are about 100 kinds of such periodicals. That is, journals with high popularity and academic level. There are about 50 such periodicals. "Double Award" and "Double Hundred" periodicals are produced through selection, and "Double High" periodicals are determined by the General Administration of Press and Publication and the Ministry of Science and Technology.
National periodical
"National" periodicals refer to periodicals sponsored by the Central Committee of the Communist Party of China, the State Council and their subordinate departments, or periodicals sponsored by China Academy of Sciences, China Academy of Social Sciences, democratic parties and national people's organizations, and periodicals sponsored by national professional societies. In addition, publications clearly marked with the words "national journals" and "core journals" can also be regarded as national journals.
Provincial periodicals
Periodicals sponsored by provinces, autonomous regions, municipalities directly under the Central Government and their subordinate ministries, commissions, departments and bureaus are provincial periodicals, and periodicals sponsored by universities are also regarded as provincial periodicals.
Supplement to a newspaper or periodical
According to the regulations of the General Administration of Press and Publication, each legal periodical can publish two supplements a year. The competent unit, organizer and serial number of the supplement are completely consistent with the publications published in the normal cycle, and cannot be called illegal or illegal publications. The supplements of popular periodicals are generally used to publish picture books, anthologies or commemorative special issues. Academic journals usually arrange some manuscripts with a certain level in supplements that can't be published in periodicals with normal cycles, so the academic influence of supplements is weaker than that of periodicals with normal cycles. When evaluating titles below the intermediate level, most provincial periodical supplements are not recognized. However, supplements of national journals or core journals are often downgraded, which is equivalent to provincial journals or general academic journals.