Information retrieval exercises that briefly describe the basic principles of information retrieval

Retrieval Procedure: The preferred source of information is the book.

Information retrieval is the main way for users to query and obtain information, and it is the method and means to find information. Information retrieval in the narrow sense refers only to information queries. That is, the user adopts a certain method according to the needs of the user, with the help of a retrieval tool, to find out the search process of the information required from the information collection.

1. The basic steps of information retrieval are subject analysis, selection of retrieval system, extraction of search terms, construction of retrieval style, literature retrieval, adjustment of retrieval style and processing of retrieval results. Information retrieval is the main way for users to query and obtain information, and it is the method and means for users to find information.

3. Generalized information retrieval is the process of processing, classifying, organizing and storing information in a certain way, and then accurately finding out relevant information according to the specific needs of information users. Also known as information storage and retrieval. In general, information retrieval refers to information retrieval in a broad sense.

4. Process the search results. The obtained search results are systematically sorted, the relevant literature information that meets the requirements of the subject is screened, the bibliographic format of the search results is selected, and the record content of the document type, language, author, title, content, source and other items is recognized, and the results of the inspection are output.

Information content analysis and encoding, generating information records and retrieval identifiers.

Organize storage, and form an orderly collection of information in the form of documents, databases, etc.

User question processing and retrieval output. The key part is the matching and competition selection of information questions and information sets, that is, the similarity comparison between a given question and the records in the set, and the relevant information is selected according to certain matching criteria.

It is divided into literature retrieval, data retrieval and fact retrieval by objectAccording to the equipment, it is divided into manual search, mechanical search and computer search. The service facilities composed of certain equipment and information collection are called information retrieval systems, such as punch card systems, online retrieval systems, disc retrieval systems, multi-** retrieval systems, etc.

Initially used in libraries and science and technology information systems, information retrieval has gradually expanded to other fields and integrated with various management information systems. Theories, technologies and services related to information retrieval constitute a relatively independent field of knowledge, which is an important branch of informatics and intersects with computer application technology.

Information retrieval and utilization is a basic course.

Information retrieval is one of the key courses to cultivate students' information awareness, information ability and information ethics, which aims to help students master the basic methods and skills of information retrieval and utilization through lectures, discussions and computer practice, so that college students can have a certain degree of scientific research and practical work ability, and lay a foundation for learning and scientific research.

Information retrieval is an on-campus course, comprehensive course (including practice), general education course, and national high-quality resource sharing course offered by the library of Southwest Jiaotong University. The course leader of the course is Gao Fan. According to the syllabus on the official website of the November 2021 Love Course, the total number of hours of the course is 32 hours.

There are 12 knowledge modules in the information retrieval course: the cultivation of information awareness and information literacy, information sources, search engines, e-book retrieval, journal database retrieval, patent information retrieval and utilization, information retrieval case analysis, citation information retrieval and utilization, data and fact retrieval, learning, examination and study abroad information retrieval and utilization, enterprise and commercial information retrieval and utilization, academic information retrieval and utilization.

In essence, information retrieval is a kind of matching and selection, which is the matching of information needs and search results. The information requirement determines the choice of search tools and search methods.

For example, common sense, popular, news, and entertainment information can be searched by search engines; Patents, standards and statistical information can be retrieved from the issuing agency**; Academic research information can be searched in databases; Complex and precise requirements can be searched using advanced methods; Vague, simple requirements can be retrieved in a simple way.

The browsing, classification, sorting, and ** of the search results are used for hand selection. The functional design of the search tool (search options or search boxes) is designed to meet various needs, and the flexible use of various search functions can effectively improve the search efficiency.

5.There's what you need.

Information retrieval answers.

Question Type 1: What are the specific contents of information literacy or quality?

Brands can be divided into according to the main body and duration of use.