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This article mainly introduces what computer retrieval technology refers to, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to understand it.

Computer retrieval technology: 1. Boolean logic retrieval; use Boolean logic operators to search the logical combination of words or codes. 2. Truncation retrieval; truncation retrieval is a very common technology in computer retrieval system. 3. Location retrieval. 4. Field limited retrieval. 5. Weighted retrieval. 6. Clustering retrieval.

Computer retrieval refers to the process in which people use specific search instructions, search words and retrieval strategies to retrieve the needed information from the database of the computer retrieval system on the computer or the terminal of the computer retrieval network. then there is a terminal device display or printing process.

In the computer information retrieval system, there are six kinds of retrieval techniques commonly used:

1. Boolean logic retrieval

The logical combination of retrieval words or codes by using Boolean logic operators is the most commonly used technology in modern information retrieval systems. There are three kinds of Boolean logic operators commonly used, which are logic or "OR", logic and "AND" and logic non-"NOT".

2. Truncated word search

Truncated word retrieval is a very common technology in computer retrieval system. Because of the characteristics of word formation in Western languages, we often encounter inconsistencies in the singular and plural forms of nouns in retrieval; words with the same meaning are not spelled in Britain and the United States; words with different prefixes and suffixes can derive many words with similar meanings, and so on. This is about to use truncated words to search.

3. Location retrieval

Location retrieval is also called full-text retrieval and proximity retrieval. The so-called full-text retrieval is to use the natural language in the record for retrieval, and the logical relationship between words is combined with position operators to limit the relative position between search words. This is a technical method that can directly use free words for retrieval without relying on the thesaurus.

4. Field-limited retrieval

Field-limited retrieval refers to a retrieval method that limits the search of key words within the range of one or more fields in the database record. In the retrieval system, there are usually two kinds of fields available for retrieval in the database: the basic field expressing the subject content characteristics of the document and the auxiliary field expressing the external characteristics of the document.

5. Weighted retrieval

Weighted retrieval is a quantitative retrieval technique provided in some retrieval systems. Like Boolean retrieval and truncation retrieval, weighted retrieval is also a basic retrieval means of literature retrieval, but unlike them, the focus of weighted retrieval is not to determine whether the search word or string exists in the database or how it relates to other search words or strings, but to determine the degree of influence of the search word or string on the hit of the document after satisfying the retrieval logic.

6. Clustering retrieval

Clustering is to divide the information with similar attributes into the same category according to the different internal attributes of things without knowing how many categories they should be divided into.

Thank you for reading this article carefully. I hope the article "what is computer Retrieval Technology" shared by the editor will be helpful to everyone? at the same time, I also hope that you will support and pay attention to the industry information channel. more related knowledge is waiting for you to learn!

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