The role of information retrieval: saving time in searching for documents

Helping to find all thematic documents

Overcoming language barriers

Characteristics of information 1) Universality, objectivity, abstraction, dependence, processability, transitivity, enjoyment

The role of information (1) Information is the condition for the survival of human society, and information is the resource for the development of human society

2) Information is the intermediary between subject and object, information is the material of thinking

(3) Information is the guarantee of the organization and the basis of information management

4) Information It is the basis for decision-making, and information is the soul of control

1. Definition of literature

All carriers that record knowledge, which are recorded in text, graphics, symbols, audio, and video, have All carriers that store and transmit knowledge are called documents.

2. Components of documents

(1) Information: content

(2) Carrier: material form

(3) Recording method: a means of fixing the content on the carrier

According to different carriers: printed, microform, machine-readable, audio-visual type

3. Main characteristics of documents

(1) Rapid growth in quantity (2) Cross-duplication of content (3) Scattered publishing of professional literature (4) Accelerated aging of literature (5) Variety of literature languages ??(6) Increased literature carrier forms

Documentation Definition: A tool that systematically organizes a large number of irregular primary documents based on the search language, reports the documents, and provides people with literature retrieval.

. Information Retrieval - refers to the process and technology of organizing and storing information in a certain way, and finding relevant information according to the needs of information users.

3. Search methods

(1) Common methods 1. Sequential search method: 2. Backward search method 3. Spot check method:

(2) Backtracking Method (Citation method)

3) Circular method (Segmentation method