Text search method and system

A retrieval system and text technology, applied in the field of text retrieval methods and systems, can solve the problems of cumbersome semantic research, semantic retrieval stays in theoretical research, and few examples, and achieve the effect of improving the recall rate

Inactive Publication Date: 2014-07-16
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

The synonym retrieval algorithm is to perform a matching operation on each related word in the search range of the thesaurus to obtain an optimal result, but this kind of matching cannot express complex relationships such as classification and reference of vocabulary, and there is no dynamic reasoning feature at the same time
[0004] Semantic retrieval can understand the

Method used

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Embodiment Construction

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0036] The text retrieval method and system according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0037] figure 1 is a flowchart of a text retrieval method according to an embodiment of the present invention. Such as figure 1 As shown, the text retrieval method according to one embodiment of the present invention includes the following steps:

[0038] Step S101, splitting the query sentence into key semantics and keywords according to the input query sentence. Whe...

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Abstract

The invention provides a text search method. The text search method comprises the following steps that an inquiry statement is divided into a key semanteme and a key word according to the input inquiry statement, semantic extension based on the domain ontology is carried out according to the key semanteme so that the extended semanteme can be generated, an extended inquiry statement is generated according to the extended semanteme and the key word, similarity grading is carried out on the extended semanteme, semantic weighing is carried out on the extended inquiry statement, text search is carried out on the extended inquiry statement so as to obtain the corresponding inquiry result, and the searched inquiry result is displayed. According to the method, the search recall ratio and the precision ratio of a search engine can be increased in the text search process. The invention further provides a text search system.

Description

technical field [0001] The invention relates to the technical field of data intelligent processing and analysis, in particular to a text retrieval method and system. Background technique [0002] For text search and catalog retrieval, the current main method is to determine whether they match according to the keywords of the search object, that is, to divide the search sentence into keywords and search separately, but the machine cannot understand human language, so it cannot understand the query intent , resulting in inaccurate search information. For example, if you search for "African American President", the search intent is "Obama", but the result contains keywords such as "America", "Black", "President" and so on. And the actual search sentence basically only includes one or two keywords, regardless of the semantics, it is difficult to deal with the problem that the same keyword has different meanings or different keywords have the same meaning, which makes it easy fo...

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Application Information

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IPC IPC(8): G06F17/30G06F17/27
CPCG06F16/31G06F16/3338
Inventor 田凌马嵩华
Owner TSINGHUA UNIV
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