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Method and device for analyzing query requirement

A technology of demand analysis and query words, applied in the field of information retrieval, can solve the problem of inability to accurately classify query, affect the recall rate of search results, etc., and achieve the effect of improving accuracy

Active Publication Date: 2014-06-04
BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing demand recognition algorithm based on rule description can classify the query and obtain the category of the query. The classification result is generally more accurate, but this method depends on the size of the rule description dictionary, and cannot guarantee that each query can be accurately identified. Accurate classification, thus affecting the recall of search results

Method used

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  • Method and device for analyzing query requirement
  • Method and device for analyzing query requirement

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Embodiment 1

[0047] figure 1 It is a flow chart of the method for query word demand analysis provided by Embodiment 1 of the present invention, such as figure 1 As shown, the method includes:

[0048] S101. Establish pattern matching trees corresponding to each category according to the pre-established pattern dictionaries for each category.

[0049] In order to classify queries by pattern matching to identify their requirements, a pattern matching tree corresponding to each category can be established through a pre-established category pattern dictionary.

[0050]The category mode dictionary can be established according to different categories, and the category mode dictionary of each category stores the query mode of the category. For example, the category mode dictionary of the map class stores the query mode of the category as: [place name] how to get there, How to get from [Place Name] to [Place Name], where is [Place Name], how to get to [Place Name] by car, the style of this type ...

Embodiment 2

[0089] Figure 4 A schematic diagram of a device for analysis of query word requirements provided by Embodiment 2 of the present invention, such as Figure 4 As shown, the device includes: a pattern matching tree building unit 10, a machine learning training unit 20, a demand identification unit 30, and may also include: a feedback unit 40, wherein the demand identification unit further includes: a pattern matching tree classification subunit 31 and a machine Learn to identify subunits 32 .

[0090] The pattern matching tree establishing unit 10 is configured to respectively establish pattern matching trees corresponding to each category according to the pre-established pattern dictionaries for each category.

[0091] In order to classify queries by pattern matching to identify their requirements, a pattern matching tree corresponding to each category can be established through a pre-established category pattern dictionary.

[0092] The category mode dictionary can be establ...

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Abstract

The invention provides a method and device for analyzing the query requirement. The method comprises the steps that the model building process is carried out, wherein pattern matching trees corresponding to different types are built in advance according to various types of pattern dictionaries composed of query patterns of various types, and query, of various types, obtained according to the pattern matching trees serves as a sample to train a machine learning recognition model; the requirement recognition process is carried out, wherein query input by a user is classified according to the pattern matching trees and the machine learning recognition model. According to the method and device for analyzing the query requirement, the query can be classified by combining the pattern matching trees and the machine learning recognition model, the pattern matching trees and the machine learning recognition model can carry out mutual feedback, and can be continuously improved, and classification accuracy of the query is improved.

Description

【Technical field】 [0001] The invention relates to the technical field of information retrieval, in particular to a method and device for analyzing query word requirements. 【Background technique】 [0002] One of the important criteria to measure the quality of a search engine is the degree to which its search results meet the needs of users, that is, the relevance of search results. In order to improve the relevance of search results, it is necessary to be able to accurately analyze the user's query requirements according to the query (query word) input by the user. The existing demand recognition algorithm based on rule description can classify the query and obtain the category of the query. The classification result is generally more accurate, but this method depends on the size of the rule description dictionary, and cannot guarantee that each query can be accurately identified. Accurate classification and therefore affects the recall of search results. 【Content of inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/951G06N5/025
Inventor 阮星华
Owner BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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