* (B) Specialized retrieval tools
* (C) the use of key disciplines navigation
search engine
* 1) First, check the help files or related materials of various search engines.
* 2) Select the appropriate search engine according to the retrieval purpose.
* 3) Select the advanced search function.
* 4) Carefully construct the retrieval expression.
# Use phrases to improve accuracy
# Select synonyms to improve recall rate
* 5) Simplify retrieval types
Professional retrieval tool
1, book retrieval
2. Newspaper retrieval
3. Paper retrieval
4. Grey literature retrieval
5. Retrieval of reference tools
1, book retrieval
* retrieval method:
+ 1)
+2) Online Library
+3) Online Bookstore
+4) Network stack
1)Calis Alliance Directory
* Introduction:
# CALIS can be used to search the national or regional joint catalog database on the Internet to find out whether the required literature is available and where to collect it. You can also search CALIS domestic and foreign literature databases online (or entrust) to obtain detailed literature clues or even electronic full text of a subject or topic.
2) Visit the online library
* OPAC in university libraries
# Can provide bibliographic database, thematic database query, and links with other related databases and intelligence agencies, etc.
* * * OPAC in public libraries
# For example, the National Library can provide queries about the collected documents, including book titles, authors, keywords, publishing places, publishing houses, standard book numbers, classification numbers, etc.
3) Visit the online bookstore
+Online bookstore database or "virtual bookshelf" can be used as a very convenient information source for people to find book information. In the online bookstore, you can easily find all the books provided, and you can quickly find the books you need by querying by different retrieval methods such as title, author, publishing house, book classification number and keywords. And through electronic payment means, the book purchase process is directly completed online. At present, some online bookstores in China also implement door-to-door delivery, and it is very convenient to collect money at home without using electronic payment means.
4) Access to online stacks
2. Newspaper retrieval
* 1) national map joint library of articles and titles of western periodicals.
* 2) Catalogue of newspapers and periodicals in China
* 3) Encyclopedia of national newspaper websites
1) joint library of foreign periodicals and national map titles.
# This database is established by the National Library of China, the Document Information Center of China Academy of Sciences, the Nanjing University Library and the National Geological Library * * * together with the data of all articles in the current citation database of EBSCO Company in the United States. Four units, including the National Library of China, use these data to establish their own databases of western periodicals, annotate their collections, and provide query services to readers through their respective websites. The system can provide multiple retrieval methods and multiple retrieval points. Users can obtain corresponding information through any combination of these retrieval points.
3. Paper retrieval
* 1) China Journal Network
* 2) Wanfang Digital Periodical Subsystem
* 3) "NPC copying newspapers and periodicals "database
* 4) Database of China Sci-tech Journals
4. Grey literature retrieval
* 1) degree thesis retrieval
* 2) Retrieval of conference papers
* 3) Search government documents and reports
1) degree thesis retrieval
A.Calis degree library
B. China dissertations database
C. Full-text database of excellent doctoral and master's dissertations in China.
D, PQDD foreign doctoral thesis database
A.Calis degree library
* Introduction:
+25,432 dissertations from Tsinghua, Peking University and other universities 10 were collected for retrieval. In the future, with the participation of more and more universities, the system will provide more abundant and comprehensive information on the topic selection of dissertations.
B. China dissertations database
* Introduction:
+The subsystem of Wanfang database can be searched from the title, author, classification number, specialty, tutor's name, etc. , and can be logically assembled, flexible and convenient to find, and can apply for original copy service online.
C. Full-text database of excellent doctoral and master's dissertations in China.
* Introduction:
+The subsystem of China Journal Network, which is similar to the full-text database of journal papers, provides a variety of search items.
D, PQDD foreign doctoral thesis database
* Introduction:
+The title and abstract database of doctoral and master's theses published in the United States contains 1000 abstracts and indexes of doctoral and master's theses from more than 65438 universities in Europe and America, covering literature, science, engineering, agriculture and medicine. About 47,000 doctoral theses and 6,543.8+0.2 million master theses are added to the database every year, including 350 doctoral theses and 654.38+0.50 master theses. You can see the first 24 pages of theses since 1997. At present, PQDD is the largest and most widely used dissertation database in the world. Our library purchased the A version of PQDD, that is, the humanities and social sciences version. The database passes through the digital island dedicated line, and readers can be exempted from paying international traffic charges.
2) Retrieval of conference papers
* A, domestic academic conference papers retrieval
+China Academic Conference Papers Database
* B, foreign academic conference papers retrieval
+Thesis Priority-International Academic Conference Thesis Index
+proceedings-index of proceedings publications
First, the domestic academic conference papers retrieval
* China Academic Conference Papers Database.
O introduction:
+Collected more than 5000 papers from national academic conferences since 1985, and added more than 5000 papers every year. This database is the most comprehensive and largest conference discussion library in China, belonging to the national key database. The database covers natural science, engineering technology, agriculture, forestry, medicine and other fields, involving more than 600 important academic conferences every year, and the database information is updated once a year. The data includes the name of the paper, author and unit, conference name, time, place, organizer, title of conference proceedings, keywords and publications.
B, foreign academic conference papers retrieval
* a, paper first-index of papers of international academic conferences
O introduction:
One of the sub-libraries of # OCLC, which contains bibliographic references of papers published in conferences, federations, expositions, seminars, professional conferences and academic reports all over the world. It covers a wide range of topics discussed at various types of international academic conferences. Covers the published papers received by British Library Information Center since 1993. It is updated every two weeks.
B, foreign academic conference papers retrieval
* b, meeting minutes-index of meeting minutes publications
* Introduction:
A branch of OCLC, which contains the conference catalogue of various academic conferences, federations, expositions, seminars, professional conferences and academic reports held around the world. Each record includes a list of papers submitted at the meeting, which provides an overview of each activity.
3) Retrieval of reports
* A, retrieval of government reports
* B, business report retrieval
3) Retrieval of reports
First, the retrieval of government reports
+the State Council Development Research Center Survey Report Online Edition
The National Research Report, referred to as the National Research Report for short, is a survey report on many fields of China's economy and society released irregularly by famous experts specializing in comprehensive policy research and decision-making consultation in the State Council Development Research Center. Rich in content, with high authority and foresight. 200 issues a year, published irregularly, online version updated online every day, with browsing and downloading function.
* Finally, I will introduce you to a website and a search engine.
* China higher education document guarantee system.
Scirus is the most comprehensive scientific and technological search engine in the world, which is devoted to scientific and technological information retrieval.
The biggest difference between Scirus and other search engines is that it can search both websites and periodical resources, and it focuses on scientific and technological content.
* Scirus can retrieve free resources and periodical resources. It covers more than 654.38+00.5 billion websites related to science and technology, including 90 million web pages and 65.43.8+07 million records from other information sources, including: Science Direct, Idea, Medline on Biomednet, Beilstein on Chemweb, U.S. Patent Office, e-print arxiv, chemical printing server, mathematical printing server, cogprints and so on.
* For more details about Scirus,
* including 654.38+02.8 million MEDLINE abstracts;
* 1.6 million full-text ScienceDirect
:: 900,000 United States Patent and Trademark Office patents;
:: Nearly 660,000 abstracts of Berstein;
* Nearly 250,000 ideal full-text articles;
* 103 10 NASA technical report;
:: Nearly 200,000 electronic documents from the electronic version of ArXiv;
* 14 10 electronic document from CogPrints;
:: 565 preprints from the mathematics preprint server;
:: 820 full-text articles from biomedical centers;
* 565 news articles from Neuroscion;
:: 465 preprints from the chemical preprint server.
Literature types: papers, patents, technical reports, news, etc. (Abstract, full text)
Subject areas: agriculture and biology, astronomy, biological science, chemistry and chemical engineering, computer science, earth and planetary science, economy, finance and management science, engineering, energy and technology, environmental science, linguistics, law, life science, material science, mathematics, medicine, nervous system science, pharmacology, physics, psychology, social and behavioral science, sociology, etc.
Access: browse all the retrieval information on the Internet homepage for free. Scirus provides periodical resources, and you can view titles and abstracts for free. However, obtaining the full text of non-free journals requires pre-registration and payment.