Synonym expansion method and device for search information

Abstract

The invention puts forward a synonym expansion method and device for search information. The method comprises the following steps that: carrying out word segmentation processing on the search information to obtain at least one segmented word of the search information; obtaining the candidate synonym set of the segmented word, wherein the candidate synonym set comprises at least one synonym of thesegmented word; forming a synonym pair which contains the synonym and the segmented word by aiming at each synonym; carrying out feature extraction on the synonym pair to obtain a synonym pair featureset; according to the feature set, predicting the synonym pair to obtain a target probability that the synonym pair is predicted as reasonable replacement; and if the target probability exceeds a preset threshold value, forming a synonym expansion item by the segmented word and the synonym, and searching and obtaining a search result on the basis of the synonym expansion item. Through the method,synonym replacement rationality and accuracy can be improved, the recall rate and the accuracy of a search result are improved, and therefore, the technical problems in the prior art that synonym replacement is inaccurate and a search result recall rate is poor can be solved.

Description

technical field [0001] The invention relates to the technical field of information search, in particular to a method and device for expanding synonyms of search information. Background technique [0002] When a user uses a search engine to search for information, it often occurs that the concept of the same word in the input search term is inconsistent with the obtained search result. In order to improve the recall rate of search results, the search engine needs to perform synonym expansion on the search words entered by users, and expand the search scope by replacing the search words with synonyms, so as to improve the accuracy of search results. [0003] In the relevant search technology, the replacement probability of synonyms is mainly calculated based on the replacement model of the language model. However, the rationality of synonym replacement cannot be accurately judged only based on the language model. There may be a problem that the replacement probability of the ...

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Problems solved by technology

[0005] For this reason, the first object of the present invention is to propose a synonym extension method for searching information, by extracting features of the synonym pair, obtaining the relative characteristics of the synonym pair, predicting the synonym pair according to the relative feature, and obtaining the synonym pair prediction as The probability of reasonable replacement is predicted as reasonable word segmentation and synonyms to form a search formula to search, so as to improve the rationality and accuracy of synonyms replacement, improve the recall rate and precision of search results, and solve the problem of inaccurate replacement of synonyms and search problems in the prior art. Technical issues with poor recall of results

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