1. Science Hub
The famous sci-hub is a tool developed by Russians, who can download any literature and magazines. Enter the information such as the title and DOI of the document you want to download, and you can get the real address of the document, browse it online, and more importantly, download it.
2. Foundation
BASE is a multidisciplinary academic search engine developed by the Library of Bielefeld University in Germany, which provides integrated retrieval services for heterogeneous academic resources around the world. It integrates the book catalogue of the University Library of Bielefeld, Germany, and the open source data of about 160 (more than 2 million documents).
3. Google Academic
Google web application for searching academic articles for free. In June 2004, 165438+ 10, Google released the trial version of Google Academic Search for the first time. This index includes most published academic journals in the world, and it is a simple method to search academic literature extensively.
You can search many disciplines and data sources from one place: peer-reviewed articles, papers, books, abstracts and articles from academic publishers, professional associations, preprints, universities and other academic organizations.
4. The origin of the library
Library Genesis claims to be a plan to help all mankind spread knowledge, without copyright. There are many papers on the website, which are easy to download, as well as many foreign language books and Chinese books, which are updated almost every day. This is also a magical website. Basically all foreign books and papers can be searched and downloaded, and recent academic papers can also be downloaded.
Library Genesis and Sci-Hub are brothers in trouble. Before, both of them were in dispute because of Elsevier, and things that can't be downloaded from Library Genesis can also be downloaded directly from the webpage to Sci-Hub.
5. Baidu Academic
Covering all kinds of academic journals and conference papers, it aims to provide the best scientific research experience for scholars at home and abroad.
Baidu academic search can retrieve paid and free academic papers, and improve the accuracy of retrieval through detailed indicators such as time screening, title, keywords, abstracts, authors, publications, and citation times of literature types.
Through Baidu Academic, you can find papers from academic websites such as HowNet, Wanfang and VIP, and you can also collect papers from Taiwan Province literature. One of the papers has the function of asking for help, which is quite practical. However, Baidu Academic is only an academic information search engine. If you download it, you will get databases such as HowNet.
6. Internet link service
A convenient and quick comprehensive network platform for consulting foreign periodicals, cnpLINKer, namely China Link Service, currently mainly provides the functions of catalog and abstract retrieval of about 3,600 foreign periodicals, electronic full-text linking and retrieval of the distribution of Chinese periodicals. And always keep the data content consistent and up-to-date with foreign publishers.
7.PMC University
PubMed Central (PMC) is a service provided by the National Institutes of Health, which archives biomedical and life science research literature. PMC is authorized by NLM (National Library of Medicine) to collect and archive biomedical and medical literature, and free of charge is the core principle of PMC. With the development of technology, the current digital storage format of files may be eliminated, but PMC keeps these contents permanently. NLM believes that digital data is not for storage, but the best use is continuous application, so free of charge is a core principle of PMC.
But free doesn't mean no copyright. Although these materials are stored in PMC, the author and publisher are the copyright owners, and all users who use PMC must abide by the copyright statement.
8. China HowNet
HowNet, the concept of national knowledge infrastructure, was put forward by the World Bank in 1998. CNKI project is an information construction project aimed at realizing the dissemination, enjoyment and value-added utilization of knowledge resources in the whole society. Initiated by Tsinghua University and Tsinghua Tongfang, it was established in June 1999. Provide CNKI source database, foreign language database, industrial database, agricultural database, medical database, economic database and educational database.
Among them, the comprehensive databases include China periodical full-text database, China doctoral thesis database, China excellent master thesis full-text database, China important newspapers full-text database and China important conference literary theory full-text database.
Each database provides three retrieval functions: primary retrieval, advanced retrieval and professional retrieval. Advanced retrieval function is the most commonly used.
9.DOAJ
DOAJ (Directory of Open Access Journals) was founded by the library of Lund University in Sweden in May 2003. The advantage of DOAJ is that it has strict quality control over the journals included, including many journals included in SCI.
DOAJ contains a large number of OA periodicals, which belongs to the best OA periodical catalogue website at present. At present, DOAJ can query not only OA journals, but also articles in some journals.
10. Book series
The book series website is rich in books, and basic professional books can be found for free download. Including gaming companies, Bookzz, Bookfi, etc. There are Bookzz and Bookfi in the navigation bar of Genesis in the library, but it seems that they can't be opened now. You can download documents and books for free. Literature download is suitable for previous years, needless to say, there are so many books!
Among them, BookSC website (http://zh.booksc.org/) has many documents. Up to today, BookSC has more than 2.78 million books and 52.42 million documents for free download, most of which are in PDF, Djvu and EUPB formats.
Download is also very convenient, just search the title of the paper or article directly, and you can also set the selection area as China. BookSC website experience is very good, click download after searching, which is super convenient!
1 1.arXiv
arXiv？ The highlight of the website is that most articles on the website will be submitted to academic journals, and most contributors are strict with articles, and only a few are always in the form of preprinted copies.
At present, the types of arXiv articles are mainly divided into seven categories: physics, mathematics, nonlinear science, computer science, quantitative biology, quantitative finance and statistics. There are several subcategories under each category, such as physics, which is divided into astrophysics, condensed matter physics, general relativity and so on. The classification of article types and contents is very professional and comprehensive.
12. Wanfang Database
Wanfang Database is a large-scale network database developed by Wan Fang Data Company, covering periodicals, conference minutes, papers, academic achievements and academic conference papers. It is also a professional academic database in China, and enjoys the same reputation as China HowNet. Integrate hundreds of millions of high-quality academic resources around the world, and integrate more than ten kinds of resources such as periodicals, degrees, conferences, scientific and technological reports, patents, videos, etc. , covering all research levels, sensing users' educational background and intelligent search. Committed to helping users accurately discover, acquire and precipitate academic essence.