The difference between China Knowledge, Wanfang and Wipro lies in the difference in database, years of inclusion and data processing efficiency. Specifically as follows:
1, the database content is different:
China Knowledge Network, since 1994, includes more than 6,000 kinds of journals, of which more than 5,400 kinds of full-text journals, about 6,640,000 full-text. To include core journals and specialized journals, *** 9 series of 126 topics.
Wipo included more than 7,000 journals from 1989 to 1999, and has reached more than 12,000 since 2000, covering almost all domestic Chinese publications. The contents are mainly in natural science and engineering technology.
Wanfang has included more than 2,700 journals since 1998***, with about 300,000 full-text articles. Subjects are categorized into basic sciences, humanities, medicine and health, and industrial technology. The proportion of core journals is high. The content is mainly scientific and technological information, taking into account the humanities, suitable for engineering or science and technology colleges and universities.
2, the inclusion of different years:
Knowledge: mainly from 1994 to the present, but there are more than 3,500 journals back to the year of publication.
WIPO: the years of the journals are from 1989 to the present.
Wanfang: includes journals dating back to 1998.
3, data processing efficiency is different:
Knowledge: thesis category "daily update", most of the other information is updated every month, for the whole library update.
Wanfang: irregular update, variable update.
WIPO: semi-monthly updates.