Scientific and technological literature search (1)

1. A carrier

2. A journal article

3. D table of contents

4. C summary

6. D Standard documents

7. D Paper

8. B Newspaper

9. B The same subject

10. A 5 most of the 22 categories

11. A S categories

12. C Citation tracing method

14. B Storage and Retrieval

15. A Patent Gazette

16. A GB

17 , A Wanfang Database Resource System

18. C The name of the journal in which the paper is published, the year, volume, and starting and ending page numbers

19. A The language of the title word

20 , C a and b and c

Different fields have different definitions of information. The library and information community defines information: Information is the external manifestation of the attributes and movement status of objective things.

Knowledge is people’s understanding of the existence and movement laws of objective things.

Documents are all material carriers that record knowledge.

The relationship between information, knowledge and documents can be summarized as follows: information is the raw material for producing knowledge, knowledge is information systematized by humans, and documents are the carrier for storing and transmitting knowledge and information.

Information is not equal to knowledge, knowledge is an important part of information. The inclusive relationship between information and knowledge can be expressed as: information is greater than knowledge. Among all things in nature, information is a form of representation of its existence in the material world.

Information, tangible, independent of actions and decisions, changes form after processing, material products, has nothing to do with the environment, can be copied; knowledge, intangible, related to actions and decisions, changes thinking and spirit after processing Products and environments change their meaning, can only be transferred after learning, and cannot be copied.

Knowledge is an organized large amount of information. Obtaining knowledge depends on obtaining information; information is the intermediary through which knowledge is formed and disseminated, rather than knowledge itself. Knowledge is useful information that has been carefully studied and understood. It is the product of human beings processing information. Not all information can become knowledge. In the information age, a large amount of information originating from many complex objects can only be truly transformed into knowledge with the help of modern information means and through cognitive subjects who master modern information science and technology.

In the database search, when the number of retrieved documents is small, it may be caused by the following reasons:

①The search word is spelled incorrectly;

② Missing important synonyms or implicit concepts;

③The search terms are too rare and specific;

④The truncation operator is not used;

⑤The position operator and Too many field operators are used;

⑥Use too many logical "ANDs" and are too strict.

⑦The number of searched databases is small

Therefore, it is necessary to expand the search scope and increase the amount of literature information detected. The specific measures are as follows:

①Reduce " AND (AND)" operator, use 0R to add related search terms; use 0R to add all hyponymic descriptors; add superordinate descriptors; use superordinate categories; exclude common concepts in the database.

② Use the truncation character (?) after words with the same stem;

③ Remove existing field restrictions and position operator restrictions (or use less restrictive ones instead position operator).

④ Correct the wrong search terms;

⑤ Add enough question words,

⑥ Use thesaurus as an adjacent keyword;

⑦Choose index words with high number of registrations;

⑧Abandon single database search and choose cross-database search

Supplementary questions:

1. Document button Its different processing depths can be divided into primary documents, secondary documents, tertiary documents and zero documents.

2. The connotation of information literacy includes information awareness quality, information ability quality and information ethics quality.

3. The main types of serial publications are journals, newspapers and yearbooks.

4. The three elements that constitute a document are information content, recording symbols and carrier materials.

5. The full Chinese name of CNKI is National Knowledge Infrastructure.

6. Commonly used methods for information retrieval include: common method, backtracking method and comprehensive method.

7. Patents have three meanings: patent documents, patent rights and patented inventions.

8. The main body of standard documents is technical standards.

9. The source of the journal article includes the name of the journal in which the article was published, the year, volume, and issue

and the starting and ending page numbers.

10. The world’s three major agricultural literature databases refer to CABI, AGRIS, and AGRICOLA.

11. In computer information retrieval, the Boolean logical operators used to combine search terms and limit the search scope include: and (*), or (+) and not (-).

12. The information quantity indicator of the extent to which the required information is detected is the detection rate.