1, database source

Many databases need to be downloaded for a fee, but most universities have already bought them, so we should make good use of library resources.

2. Literature retrieval

A large number of documents usually appear after keyword search, and the value of papers can be judged by citation frequency, which reflects the number of times the documents are read or downloaded (document-level dose index). Of course, this method is only a rough choice and has its limitations. For example, the latest literature does not have enough time to accumulate citations, and citations in some disciplines are relatively slow to produce.

If there are too many search results, you should streamline them. Wet of Science has a special "refining search results". Hot papers refer to papers published in recent two years and cited in May and June, which are the best 0. 1% in Iwasaki's academic field.

3. Track the latest research hotspots.

In addition, starting from an existing paper, expanding the search to find out who is quoting this paper, it is easy to obtain relevant papers in various time periods. Follow up the latest research hotspots through some cited papers that put forward new ideas and can make up for the shortcomings of existing research results.

4, the method of free download literature

Elbajin, the founder of SCI-HUB website, was born in Almaty, Kazakhstan in the Soviet era on June 6th, 1988+065438. When Guo Jingzao was engaged in research at Harvard University, he used infringing papers shared by others because he could not afford the hundreds of papers he needed.

This experience made her think that only by letting more people browse the contents of the pay walls Mechanism can the dissemination of knowledge be enhanced. So after she returned to Kazakhstan on 20 1 1, she created Sci-Hub, which can be searched by DOI.