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Question sentence classification method suitable for automatic question and answer system

A technology of automatic question answering and classification method, which is applied in special data processing applications, instruments, electronic digital data processing, etc.

Inactive Publication Date: 2018-01-19
NANJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

There is a technical problem of low efficiency in the existing question classification method

Method used

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  • Question sentence classification method suitable for automatic question and answer system
  • Question sentence classification method suitable for automatic question and answer system
  • Question sentence classification method suitable for automatic question and answer system

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] The invention provides a method for classifying questions based on the improved TF-IDF. The method combines the actual situation and considers the similarity and correlation between feature words, makes up for the shortcomings of the traditional TF-IDF algorithm, and improves the quality of questions. classification efficiency.

[0036] The invention discloses a method for classifying questions aimed at people's livelihood questions, including education, civil affairs, social security, food and medicine, environmental protection, industry and commerce and other seven categories.

[0037] figure 1 It is an algorithm flowchart of the present invention, a kind of question classification method applicable to automatic question answering system, ...

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Abstract

The invention discloses a question sentence classification method suitable for an automatic question and answer system. The method is suitable for the technical field of computers. The method comprises the steps of obtaining to-be-classified question sentences, and performing word segmentation and part-of-speech tagging by utilizing a word segmentation tool; obtaining to-be-classified question sentences subjected to word segmentation operation, and performing preprocessing; obtaining preprocessed to-be-classified question sentences, finding out keywords in the question sentences to form a keyword set, calculating weights of the keywords in the keyword set according to an improved TF-IDF algorithm, and taking first N keywords according to a specific method; according to a dependency grammaranalysis method, extracting relationship features of subject-predicate, verb-object and modifier-head dependency grammars of the keywords in the question sentences; and classifying keyword vectors byutilizing a trained Naive Bayesian model to obtain a classification result. The question sentence classification accuracy and efficiency are improved.

Description

technical field [0001] The invention relates to the field of artificial intelligence, in particular to a question classification method suitable for an automatic question answering system. Background technique [0002] Question answering system is a new generation of intelligent search engine, which allows users to ask questions in natural language and can return accurate answers to users. Compared with the traditional keyword retrieval, the question answering system can better meet the needs of users for obtaining information quickly and accurately. [0003] The working process of the automatic question answering system mainly includes three stages: question classification, answer search and answer extraction, among which question classification is the key step. Its main task is to perform word segmentation, part-of-speech tagging, stop word removal, and noise removal on Chinese questions raised by users, so as to clarify the intention of the question and determine the cat...

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Application Information

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IPC IPC(8): G06F17/30G06F17/27
Inventor 李晓飞徐晓芳韩光
Owner NANJING UNIV OF POSTS & TELECOMM
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