Quoted from ki
1. Primary search and search control
Primary search is the most basic search method. The search terms mainly include: article title, keywords , abstract, author, institution, full text, journal title, etc. Article title search: Search for articles in which the search terms appear in the article title.
Author search: Search articles published by an author.
Keyword search: Search for articles in which the search terms appear in the article keywords.
Institutional search: Enter the name of the institution to search for articles published by authors from that institution.
Chinese abstract search: Search for articles in which the search terms appear in the Chinese abstract of the article.
Chinese title search: Search for articles published in a certain journal.
Year search: Search articles of a certain year.
Issue search: Search for articles in a certain issue.
Full-text search: Search for articles where the search terms appear in the full text of the article (including the entire content of the article).
In addition, source: generally refers to the journal or publisher from which the article comes.
Term frequency refers to the frequency of search terms appearing in the search terms. (Function?)
The button after the word frequency records the 10 search terms used in the recent search. You can click it and select the required search terms in the pop-up dialog box.
The expansion button allows the system to expand the search terms in the knowledge metadata database based on the search terms you entered. It is used when you are not very sure about the search terms, or are you right? , the extended function can help you find accurate search terms.
Time limit: You can search within a certain time range to make the search more precise.
Search scope: mainly core journals, EI source journals and SCI source journals. If no selection is made, all journals will be searched.
Matching methods: There are exact matching and fuzzy matching. This is mainly a matter of precision and recall.
Sorting method: divided into sorting by time and sorting by relevance, or not sorting. Sorting by relevance means sorting according to the closeness of the search terms to the search topic (based on comprehensive evaluation of factors such as word frequency, lexeme, etc.), which can greatly improve the accuracy of search results, not only ensuring the recall rate, but also eliminating search garbage. influence.
Three: VIP
1. Simple search
Simple search means directly entering the search terms and limiting the search scope to search.
Once Search icon
2. Compound search is divided into secondary search and search by directly inputting the search expression.
For example: you need to find articles about "songs" and the author is " Liu Ruoying", you can use the secondary search method or the search expression method to achieve it.
Secondary search icon
How to limit the search scope:
1. Selection of search entry
You can select the title, keywords, title or keywords, author, first author, journal title, author institution, abstract, classification number, and any field. ;
2. Search scope restrictions
You can select the journal range (all journals, important journals, core journals);
3. Publication years Restrictions
You can set restrictions on specific years of journals (from 1989 to 2004)
4. Secondary search function
Search for users’ primary search You may encounter unsatisfactory search results in the results. In this case, you can consider using a secondary search. The secondary search uses "AND, OR, NOT" in the search results of the primary search to further restrict the search to obtain the ideal results. Search results.
Note: Logical operation symbols and "*", or " ", not "-", brackets "()" cannot be searched as search terms, and your search terms may happen to Contains these logical language symbols, such as C. If this happens, please adjust/modify your search terms to retrieve the search results you need.
For example: If the first time If the search condition is A and the second search condition is B, then the search results of several secondary searches are graphically represented (the gray part is the hit result)
5, synonyms
Check "Synonyms" in the upper left corner of the page, select the keyword field to search, and you can view the synonyms of the keyword. Using the synonyms function in the search can increase the detection rate.
For example: Check Synonym function, enter "CAD" in the keyword field and click the "Search" button to view the synonyms of "CAD". Check "CAD System" and click the "OK" button to get "Keyword=CAD CAD System" "'s search results.
Note: The synonyms function only applies to three search fields: keywords, title or keywords, title
6, author with the same name
Check the author with the same name in the upper left corner of the page, select the search entry as the author (or the first author), enter the search term "Zhang San", and click the "Search" button to find a list of authors named "Zhang San" , users can find the required information to make further choices.
Note: The same-name author function only applies to two search fields: author, first author.
7. My database
"My Database" is a personalized service for users launched by VIP Company in 2004. It provides users with keyword customization, journal customization, classification customization, saving search terms, saving articles (e-book shelves), etc. Function. Pictures are as follows:
1. Only after successfully logging into "My Database" can the search results (articles) and search expressions be saved to "My Database".
2. In my database, we will introduce you to the practical application of various services:
3. "My Home Page" provides successful customization of journal storage, keyword customization, classification customization, etc. Information.
4. "My e-book shelf" is used for users to check the article on the search results page and click "Add to e-book shelf" to save the article to their own e-book shelf.
5. "My Search History" can save the "search formula" displayed on the search results page after the user performs a search operation.
6. "Classification Customization" , journal customization and keyword customization" respectively provide users with subject categories, journals
As well as query keywords and other range categories limited according to the user's own requirements, it is convenient for users to search quickly.
How to download the retrieved documents:
Single article 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 article bibliography page to download the PDF format. Full text
Download multiple articles
Check the article on the overview page of the search results, click the full-text download button, and the article download management page will appear;
Select To download the full text, a full-text download list will appear. Click the full-text download icon in the list to download the full text;
Click Add to e-shelf to save the article to the e-shelf of "My Database"
How to print articles
After selecting the article, click the "Print" button to enter the print management page:
Select the article content to be printed (summary display, abstract display, full record display) ) and confirm printing. The article content is displayed on the page in .txt format. Just print according to the page prompts.
How to process the downloaded full text
The full text is provided in two formats : VIP format and PDF format (internationally accepted format). The full text of VIP format requires the installation of VIP Company's "VIP Browser" to open; the full text of PDF format requires the installation of Adobe Reader reading software to open. Here we introduce the full text processing of PDF format Method:
How to choose the search method that suits you
Answer: VIP Information Network has five search methods: simple search, traditional search, classification search, advanced search, and journal navigation. Simple The search is similar to "fool search". For traditional searches, you can set conditions before searching to narrow the search scope. The journal navigation uses the journal name to search for conditions, and can directly display the journal information by category. Users can search according to their own preferences. Choose the search method that suits you. The characteristics of each search are listed below for your reference:
General search: simple to use, wide range, suitable for users with vague search goals;
Traditional search: Classified by subject according to the China Library Classification Method, allowing you to conduct systematic searches in professional disciplines;
Advanced search: The multiple search methods provided can design multiple search condition restrictions and search multiple fields at the same time. Make the search more accurate and faster
;
Classification search: Through the professional subject classification table, you can choose different subject ranges for search, and you can conduct a comprehensive search of several subjects Search;
Journal Navigation: You can choose three flexible search methods in the journal navigation to directly find the journal you need;
Another: citation/viewdiary.16009214.html VIP (VIP) mainly started in the two years of 1989 and 2000. There are only 15 new titles in the retrospective period. Nearly 1/4 were absent from term or year between 2001 and 2005, and 1/3 were absent from term or year before 2001. The update speed is relatively slow, with nearly 90% lag.
CNKI (Tongfang) mainly dates back to 1994, 1986 and after 1986. They account for nearly 70% of the total, and there are only 10 new journals that are discontinuous. Nearly one-third of the journals are missing a year, and most of them are concentrated from 1994 to 2005. However, before 1994, there were more missing whole years. It has the best update speed, with 540 lagging journals accounting for 31.47%, of which the vast majority are lagging by 1-2 issues.
Wanfang mainly goes back to 2000 and 1999, and one *** accounted for nearly 70%. There are only 10 journals that are discontinuous additions. Nearly 1/3 of the journals are missing for years. The update speed is good. Although there are 699 lagging journals, accounting for 53.2%, most of them are only lagging behind by one issue.
The situation of yearly and periodic shortages in the three major databases is still serious.
Among them, VIP is the most serious. Although its total volume is about twice that of CNKI, its lack of issues is 3-4 times that of CNKI, and its core journal inclusion rate is only 5 times more than CNKI. The update speed of the three major databases has increased than before.