Elsevier Science is the world recognized high-grade academic publishing company, is also the world's largest publisher, has more than 100 years of history. Since 1999, online services for readers of the full text of electronic publications, including over 2,200 peer-reviewed journals and more than 2,000 series of books, handbooks and reference books belonging to the Elsevier Publishing Group, have been published in four major subject areas: Physics And engineering, life sciences, health sciences, social sciences and humanities, the database contains more than 8.56 million articles in total. SDOS (ScienceDirect OnSite) is Elsevier's online search service for more than 1500 electronic journals. Users can search online through the Internet, browse, print and download the required journal articles.
2005 Started from SDOS (domestic mirror) to SDOL (foreign mirror), compared with SDOS, SDOL has the following advantages:
1.SDOL and SDOS journals are basically the same, but SDOL is updated from time to time, so journals update faster than SDOS;
2.SDOL users can see Article in Press in advance, ie articles that have been edited for review but not published in paper journals, and users who use SDOS will not be able to see it.
3.SDOL users through the free registration, you can have a strong personalized service, including the establishment of personal libraries, e-mail tips;
4. From the search results, SDOL full text in addition to PDF format, but also includes HTML format, the user can choose according to need;
5. The existing secondary literature library can be full-text links to the collection, generally only link to the full text of the SDOL server, so users using SDOL can get one-stop full-text reading. SDOS users can not directly link to the Elsevier full-text directly from the secondary repositories retrieved.