Method and device for enquire enquiry extending as well as related searching word stock

Abstract

The invention discloses a method and a device for query expansion and a correlation retrieval word library, which solves the problem that a current searching system can not automatically and effectively realize query expansion and provide effective support for retrieval behaviors of a user. The method comprises the steps of dividing the query behavior records of a user into at least a query event and query units according to the identity and access time of the user; calculating the correlation degrees between retrieval words in the query units and the query event periodically, and updating a correlation retrieval word library according to the calculated correlation degrees; and retrieving correlation retrieval words having a close correlation degree to the retrieval word inputted by the user in the correlation retrieval word library, thus forming a query expansion result. The invention can be applied to various searching systems, effectively assist users to query, reduce query load of the users, and improve the searching efficiency of the users.

Description

technical field [0001] The invention relates to a query expansion technology in the field of information retrieval, in particular to a query expansion method and device and a related retrieval lexicon. Background technique [0002] With the rapid development of computer information technology and Internet technology, the content and quantity of electronic information on the network have increased dramatically. Facing the ocean of electronic information, the search system has become an important tool for people to effectively use network resources. The existing mainstream search systems basically adopt full-text retrieval technology. The principle of full-text retrieval technology is to divide the content to be retrieved into shorter text sequences, and then generate an index of the strings contained in each text sequence. After the user enters a search term or sentence, it is also segmented and compared with the index, and then the list of article links to which the matchin...

AI Technical Summary

Problems solved by technology

[0007] (1) Due to the large number of synonyms and polysemous words in Chinese, as well as the diversity of Chinese expressions, the search terms used by users when constructing query expressions are often not standardized, which is very different from the words or phrases used in the search system document index difference, resulting in the "expression difference" problem in information retrieval

[0008] (2) When a user makes a query, the number of search words used is not many, usually 1 or 2, and it is impossible to describe the user's information needs in detail; especially when the user does not know their own information needs, the above problems become more prominent

However, this method requires professionals to compile dictionaries and define the relationship between various words, which takes a long time and has high maintenance costs. It is generally only suitable for search systems in professional fields or special database query systems, not for large data volumes. Search systems for non-professional fields

In addition, this method is also not suitable for the rapid growth of new words on the Internet, nor can it deal with news related words that change over time.

[0014] To sum up, there is currently no better method on the general search system, which can automatically and efficiently expand the query for the problems existing in the user search, and provide effective support for the user's search behavior.

Images