What database does pqdd search for?

pqdd is a database for retrieving doctoral and master's theses. Its full English name is "ProQuest Digital Dissertations", which means a digital doctoral and master's thesis abstract database; PQDD provides a total of 14 fields for retrieval. Commonly used fields include: title, abstract, Author, tutor, school, subject, era, language, etc.

#The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

What database does pqdd search?

PQDD (ProQuest Digital Dissertations) is a digital doctoral and master's thesis abstract database. It was developed by the American ProQuest Company and has included more than 160 There are more than 10,000 records, covering information from the world's first doctoral thesis approved in 1861 (in the United States) to the doctoral and master's thesis approved this semester this year.

In addition to the citations related to each paper, the database also includes a 350-word abstract written by the author himself in the doctoral theses published after 1980. Information on master's theses published after 1988 includes a 150-word abstract. More than 55,000 new paper entries are added every year.

For electronic copies of papers published after 1997, users can browse the first 24 pages of these papers for free. The database has a complete version and two volume versions, namely Series A and Series B. Series A is mainly the humanities and social sciences edition, and Series B is mainly the science and engineering edition.

PQDD provides a total of 14 fields for retrieval. Commonly used fields include: title, abstract, author, advisor, school, subject, and year. (year), language (language), etc.

Recommended: "Programming Video"

The above is the detailed content of What database does pqdd search for?. For more information, please follow other related articles on the PHP Chinese website!