1. Primary retrieval and retrieval control

Primary retrieval is the most basic retrieval method, and the retrieval items mainly include: article title, keywords, abstract, author, institution, full text, publication name, etc. Title retrieval: Retrieve articles whose search terms appear in article titles.

Author search: search for articles published by authors.

Keyword retrieval: use the search words in the article keywords to retrieve articles.

Institution retrieval: enter the name of the institution to retrieve the articles published by the author of the institution.

Chinese abstract retrieval: search articles with search terms in the Chinese abstract of articles.

Chinese title retrieval: retrieval of articles published in journals.

Annual retrieval: retrieve articles of a certain year.

Periodical retrieval: retrieval of articles in a certain issue.

Full-text retrieval: full-text retrieval of articles with search terms (including all articles).

In addition, source: generally refers to the periodical or publishing house where the article comes from.

Word frequency refers to the frequency with which search terms appear in search terms. (function? )

The button after the word frequency records the 10 search words used in the recent search. You can click on it and select the required search word in the pop-up dialog box.

The expand button is used to expand the search words in the knowledge meta-database according to the search words you entered. When you are not sure about the search words, or are you right? Extended functions can help you find accurate search terms.

Time limit: you can search a certain time range to make the search more accurate.

Search scope: mainly core journals, EI source journals and SCI source journals. If no selection is made, all journals will be searched.

Matching methods: exact matching and fuzzy matching. This is mainly a question of accuracy and recall.

Sorting method: it can be divided into time sorting and correlation sorting, or it can be sorted without sorting. Sorting by relevance refers to sorting according to the closeness between search words and search topics (based on comprehensive evaluation of word frequency, word position and other factors), which can greatly improve the accuracy of search results, not only ensure the recall rate, but also eliminate the influence of search junk.

Three: Vip

1, simple search

Simple retrieval is to directly input search terms and limit the search scope.

One-time retrieval map

2. Composite retrieval can be divided into secondary retrieval and direct input retrieval expression retrieval.

For example, you need to find an article about "Song" by "Rene Liu", which can be searched twice or by searching for expressions.

Secondary retrieval graph

How to limit the search scope:

1, selection of search items

You can select title, keyword, title or keyword, author, first author, publication name, author organization, abstract, classification number and any field in;

2, search scope restrictions

You can select the periodical range (all periodicals, important periodicals and core periodicals) in;

3. Limitation of publishing years

You can limit the specific year of a periodical in (from 1989 to 2004).

4. Secondary search function

Users may encounter unsatisfactory retrieval results in the first retrieval, so they can consider the second retrieval. The second retrieval is to re-restrict the retrieval with "AND, OR, NOT" in the retrieval result of the first retrieval, so as to get the ideal retrieval result.

Note: Logical operation symbols and *, or+instead of-and brackets () cannot be used as search words, but your search words may just contain these logical language symbols, such as C++. If this happens, please adjust/modify your search terms, and you can retrieve the search results you need.

For example, if the first search condition is a and the second search condition is b, the search results of several secondary searches are graphically represented (the gray part is the hit result).

5, synonyms

Check the "Synonyms" in the upper left corner of the page and select the keyword field to search, and you can see the synonyms of this keyword. Using synonym function in search can improve the recall.

For example, check the synonym function, enter "CAD" in the keyword field and click "Search" to view the synonyms of "CAD", check "CAD system" and click "OK" to get the search result of "keyword =CAD+CAD system".

Note: Synonym function is only applicable to three retrieval fields: keyword, title or keyword and title.

6. Author of the same name

Check the author with the same name in the upper left corner of the page, select the search item as the author (or the first author), enter the search term "Zhang San", and click the "Search" button to find the list of author units named "Zhang San". Users can find the information they need to make further choices.

Note: The author with the same name function only applies to two retrieval fields: the author and the first author.

7. My database

"My Database" is a personalized service for users launched by VIP company in 2004. Provide users with functions such as keyword customization, periodical customization, classification customization, saving and retrieval, and saving articles (e-book shelves). The picture is as follows:

1, search results (articles) and search expressions can only be saved in my database after successfully logging in to my database.

2. In my database, we will introduce the practical application of various services:

3. "My Home Page" provides information on successful customization such as periodical customization, keyword customization and classified customization.

4. "My ebook shelf" is used for users to view articles on the search results page and click "Join ebook shelf" to save articles to their ebook shelf.

5. "My Search History" can be saved after the user performs a search operation.

6. "Classification customization, periodical customization and keyword customization" provide users with subject categories, periodicals and query keywords respectively, which are limited according to their own needs to facilitate users' quick retrieval.

How to download the retrieved literature;

Single download

On the search results page, click the full-text download icon corresponding to the article to download the full-text in PDF format;

Click the full text download icon on the title page of the article to download the full text in PDF format.

Download multiple articles

Check the article on the search results overview page, and click the full-text download button to open the article download management page;

Select Download Full Text, and a full-text download list will appear. Click the full-text download icon in the list to download the full text;

Click Join E-book Shelf to save the article to the E-book Shelf of My Database.

How to print an article

After checking the article, click the "Print" button to enter the print management page:

Select the printed article content (summary display, summary display, full record display) and confirm printing. The content of the article is displayed on the page of. Txt format, and print according to the page prompts.

How to deal with the downloaded full text

The full text is provided in two formats: VIP format and PDF format (international common format). The full text in VIP format can only be opened if the VIP browser of VIP company is installed. The full text in PDF format can only be opened if Adobe Reader reading software is installed. Here we introduce the full-text processing method in PDF format:

How to choose a suitable retrieval method?

Answer: There are five retrieval methods in VIP information network: simple retrieval, traditional retrieval, classified retrieval, advanced retrieval and periodical navigation. Simple retrieval is similar to "fool retrieval". Traditional retrieval can set conditions before retrieval and narrow the scope of retrieval. Periodical navigation is expected to be named as retrieval condition, which can directly display periodical information by classification. Users can choose a suitable retrieval method according to their own preferences. The following will list the characteristics of each retrieval for your reference.

General retrieval: simple to use, wide in scope, suitable for users with vague retrieval objectives;

Traditional retrieval: According to China Library Classification, it is convenient for you to make a systematic query on professional disciplines;

Advanced retrieval: The provided multiple retrieval methods can design multiple retrieval conditions and retrieve multiple fields at the same time, which is convenient for inspection.

Telegrams become more accurate and faster;

Classified retrieval: through the classification table of professional disciplines, you can select different disciplines for retrieval, and you can conduct comprehensive retrieval of multiple disciplines;

Periodical navigation: you can choose three flexible search methods in periodical navigation to find the periodical you need directly;

In addition,/viewdiary.16009214.html VIP (VIP) mainly started in the years of 1989 and 2000, and only 15 was added intermittently in the retrospective. 200 1 until 2005, there will be a short period or year of 1/4, and there will be a short period and year of 1/3 before 200 1. The update speed is relatively slow, with a lag of nearly 90%.

CNKI (Tongfang) mainly dates back to 1994, 1986 and 1986, accounting for nearly 70%, and only 10 periodicals are added discontinuously. The journals with insufficient years are near 1/3, mostly from 1.994 to 2005, but there are many years before 1.994. Its updating speed is the best, with 540 periodicals lagging behind, accounting for 3 1.47%, of which 1-2 issues account for the vast majority.

Wanfang mainly dates back to 2000 and 1999, accounting for nearly 70% of the total. Only 10 periodicals are added intermittently. There is a publication vacancy period and year close to 1/3. The updating speed is good. Although there are 699 periodicals * * * accounting for 53.2%, most of them are only 1.

The shortage of three warehouses is still serious. Among them, VIP is the most serious, although its total amount is about 2 times that of CNKI, but its lack time is 3-4 times that of CNKI, and its core journals are only 5% higher than that of CNKI. The update speed of the three databases is faster than before.