SCI,EI,ISTP Three science and technology literature retrieval System

3, 500 kinds of  5, 600 kinds of  3, 500 kinds (with printed version)  5, 600 kinds (with online version)   
"Engineering Index" (Engineeringindex,ei), published in 1884 by the American Engineering Information company, reports on various disciplines of engineering technology journals, conference papers, science and technology reports and other literature. Version (and distinguished name) publication cycle includes the source  disc version (EI Compendex) bimonthly 2600 kinds of  5, 600  CD-ROM (with Digest) (SCICDE) weekly Update 5000 of    which online version (EI compendex Web) includes two parts of the disc version (Ei compendex) and ei pageone.     
The index to Scientific & TECHNICALPROCEEDINGS,ISTP, also published by the ISI, was launched in 1978 to report the conference papers of the World's annual science and Technology conference. Version (and distinguished name) publication cycle included in the document source  print edition (ISTP) Monthly Report 4,700 multi  -conference CD-ROM (ISTP) quarterly update reports 10,000 kinds of conference records  online edition (wosp-s/t) weekly update with the CD-ROM version   

SCIThe SCI contains about 3500 core periodicals of various sciences, such as number, rationale, chemistry, Agriculture, forestry, medicine, life sciences, astronomy, geography, environment, materials, engineering technology, etc. Through its rigorous offprint standards and assessment procedures, ISI selects the source, and the annual increase or decrease, so that the literature included in the SCI can comprehensively cover the world's most important and most influential research results. The so-called most influential findings of the ISI refer to the literature that has been reported on these results in large numbers by other references. To this end, as a search tool, SCI anti-other search tools through the topic or classification approach to retrieve the general practice of literature, and set up a unique "citation Index" (Citationindex). That is to illustrate the relevance of the literature and the influence of the previous literature on the current literature through the reference of the current literature. The characteristics of the above methods make sci not only be used as a document retrieval tool, but also become a basis for scientific research evaluation. Scientific research institutions are included in the total amount of paper, reflecting the entire organization of scientific research, especially the level of basic research, the number of individual papers collected by SCI and cited times, reflecting his research ability and academic level. In addition, the ISI publishes JCR annually (Journal Citation report, full name Journalcitationreports). JCR the citation and quoted data of 4700 periodicals, including the 3500 periodicals included in the SCI, are counted and calculated, and the index of influencing factors (impactfactor) is defined for each periodical. The influence factor of a periodical refers to the average number of citations in the current year published in the first two years of the publication. The higher the influence factor of a publication, the higher the citation rate of the published literature, on the one hand, indicates that the research results of these literatures are of great influence, and on the other hand it reflects the high academic level of the publication. Therefore, JCR has become a periodical evaluation tool with its large number of periodical statistics and the influential factors of calculation. The library may make the policy of introducing periodicals according to the data provided by JCR, and the author can decide the direction of submission according to the influence factor ranking of periodicals.EIEI is the abbreviation of the American Engineering Index (THEENGINEERINGINDEX). EI was founded in 1884 by the American Engineering Intelligence Corporation (ENGINEERINGINFORMATIONCO). EI is a comprehensive search tool in the field of engineering technology, including: Electrical, automatic control, power, machinery, instrumentation, materials science, agriculture, bioengineering, mathematics, medicine, chemical industry, food, computer, energy, geology, environment and other disciplines. Ei Compendex is the world's first source of engineering abstracts. The annual new 500,000 abstracts index information from the Ei Compendex database comes from 5100 engineering journals, conference essays and technical reports. The literature included in Ei Compendex covers all engineering areas, of which about 22% are conference documents and 90% of the literature is in English. EI began to collect Chinese periodicals in 1992. In 1998, EI established ei China Mirror at Tsinghua University Library.ISTPISTP is Indextoscientific&technicalproceedings's abbreviation and is one of two databases (ISTP and ISSHP) in the network database webofscienceproceedings of the American Institute of Scientific Information. Specialized in the world's major natural sciences and technical aspects of the Conference, including general meetings, symposia, research seminars, conferences, publications, such as the conference documents, involving the basic disciplines and SCI. The number of papers included in ISTP is related to the number of important international academic conferences attended by scientific and technical personnel or the number of papers submitted and published. The papers published by Chinese scientific and technical personnel at international conferences held abroad accounted for 64.44% of the total number of papers included. In the three retrieval systems of ISTP, EI and SCI, SCI can reflect the research level of basic subject and the quality of paper, the scientific and technical periodicals included in this retrieval system are more comprehensive, which can be said that it is the essence of high quality and excellent papers in various disciplines, which has always been the center and focus of the world scientific and technological circles. ISTP, The two retrieval systems of EI evaluate the quality standard of sci-tech papers and sci-tech periodicals comparatively looser.

SCI,EI,ISTP Three science and technology literature retrieval System