2. Intelligence: confidentiality, timeliness and transmissibility.
3. Information > Knowledge > Intelligence
4. Four elements of modern literature: literary information, literary carrier, symbol system and recording method.
5. Types of literature retrieval:
According to the forms of test results: bibliographic retrieval, full-text retrieval and citation retrieval.
From the perspective of information retrieval, it can be divided into literature retrieval, data retrieval and fact retrieval.
According to retrieval methods: manual retrieval and computer retrieval.
According to the processing degree of the extracted documents, the document retrieval system can be divided into: bibliography abstract and full-text retrieval.
6. Appearance characteristics of the document: title, author, source, issue, page number, year, month, type, number and language.
Content characteristics: the central content of the document, such as subject words, classification number, category name and abstract.
7. Elements of document retrieval system: retrieval of documents, technical equipment, language stationery and personnel.
8. The recall rate R= the amount of relevant information detected/the total amount of relevant information in the retrieval tool * 100%.
Accuracy ratio P= relevant information detected/total information detected * 100%.
If the recall rate of retrieval tools is high, its precision rate will decrease relatively; On the other hand, if the accuracy is high, the recall rate is low; Moreover, the recall and precision can only be improved relatively, and it is never possible to reach 100% at the same time.
9. Types of literature information
① Expression forms: text type, video type, audio type and digital type.
(2) Publication forms: books, periodicals, government publications, scientific reports, patent documents, conference documents, dissertations, standard documents, product manuals, scientific and technological archives, etc.
③ Carrier forms: printing type, miniature type, audio-visual type and electronic file type.
④ Processing degree: first-class literature information: published books, periodical papers, scientific reports, conference documents, dissertations and invention patents.
Secondary literature information: various retrieval tools or databases, such as catalogues, abstracts and indexes.
Literature information is tripled: a. Review research category: dynamic review, topic summary, special review and progress report.
B reference tools: yearbooks, handbooks, encyclopedias, dictionaries, encyclopedias and guides.
Zero document information: unpublished, such as draft articles, personal notes, meeting minutes, unpublished celebrity handwriting, oral discussions, etc.
10. Types of electronic literature resources: reference database, full-text database, fact and numerical database, e-book, search engine (classification guide), online academic resources subject navigation, and other Internet electronic resources.
1 1. Retrieve the logical relations between language concepts: equivalence, subordination and correlation.
12. Type of retrieval language
① According to the controlled conditions of retrieval language words: standard language and nonstandard language.
② Time set according to the search identifier: ancestor language (classification language, title language)
Post-ancestor language (narrative language, unit word language, keyword language)
③ Information features described by retrieval languages: retrieval languages describing external features of information and retrieval languages describing internal features of information. The latter can be divided into classification language, code language and topic language.
13. Subject language: keyword language, title language, unit language and narrative language.
14, ① Boolean logic operator: AND (improving precision)
Or (improve the recall rate)
No (improve accuracy)
② Positioning operator: improve accuracy.
③ Field qualifier: improve the accuracy.
④ Word segmentation operator: improve the recall rate.
15. Basic methods of document retrieval: common law, retrospective method and segmentation method.
Methods: Classification, subject method, author method, number method and other methods.
Step: Analyze the subject, select retrieval tools and methods, select retrieval marks and retrieval methods, conduct retrieval, process retrieval results, and obtain original documents.
16,. Lithotripsy for urinary calculi
Keywords: gravel Keywords: MT method
Keywords: urinary calculi, sub-keywords: surgery
17, the name of drug therapy for diseases.
Drug therapy application
18. Proximity operator: the word order of W/n is not necessarily.
The pre /n word order is definite.
19.SINOMED China Biomedical Literature Service System (China Biomedical Literature Database CBM, West WBM).
China Medical Thesaurus includes the subject indexing of MeSH and China Medical Thesaurus, which are classified and indexed according to China Library Classification and Medical Specialty Classification.
20.PubMed database: As a part of CNBI, it mainly provides retrieval of medical journals, including MEDLINE.
PubMed-in process is a temporary process that accepts new data every day.
PubMed- provided by publishers, sent by periodical publishers, and indexed to become official records.
Pre-medical treatment is being processed.
Ad: the research institution and mailing address of the first author of affiliation.
AU: author
All: all fields except English translation of titles and publishing countries.
1AU: the first author
FAU: author's full name
LASTAU: the last author (the last author, the responsible author)
PT: article publishing type
TA: full name, abbreviation and ISSN number of the journal.
TI: English title of the article
TIAB: title/abstract title/abstract
LA: language (the language in which the article is published)
TW: key words
Six: volume volume
Seung Heon: subtitles
Automatic conversion matching retrieval; Net table, journal title table, phrase table, author index
2 1. SD retrieval
Wildcard: * Any? One character
Proximity operator: there are no more than n words between W/n, and the order of Pre/n is fixed.
Order: or & gtW/n, Pre/n & gt；; And> instead of
Phrase: Add ""
Support Greek letters
Advanced Search: Specific Authors Specific Authors
References Full-text references: citations
Search for secondary retrieval in the results
The summary will appear in the open preview.
impact factor
Which of the following belongs to the content feature d of the literature?
title
author
source
class number
language
Which of the following retrieval languages is the post-ancestor standard retrieval language A
Unit word language
Keyword language
Title word language
Free word language
Classified language
3. The concept of "banana apple" is "banana-flavored fruit+apple", and its combination is D.
First, the unit word language
B, keyword language
C, the title word language
D, narrative language
E, free word language
Find the information about "psychological care of myocardial infarction", which belongs to A.
Search literature
Data literature
Fact file
Digital literature
Full text literature
Which of the following does not belong to the standard retrieval language C
Unit word language
Narrative language
Keyword language
Title word language
Classified language