Text feature extraction method, system and device based on feature coding

A feature encoding and feature extraction technology, applied in the field of information classification, can solve the problems of low classification efficiency and accuracy, and high computational complexity, and achieve the effect of reducing feature dimension, overcoming limitations, and improving accuracy.

Active Publication Date: 2019-07-05
INST OF AUTOMATION CHINESE ACAD OF SCI +1
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  • Abstract
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Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, that is, the problems of high computational complexity, low classification efficiency and low precision in text feature extraction, the present invention provides a text feature extraction method based on feature coding, including:

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  • Text feature extraction method, system and device based on feature coding
  • Text feature extraction method, system and device based on feature coding
  • Text feature extraction method, system and device based on feature coding

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[0052] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, not to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

[0053] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0054] The present invention provides a text feature extraction method based on feature coding, which is based on a binary text feature coding method and combined with a genetic algorithm to realize the selection of text features, which can effectively overcome the limitations faced ...

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Abstract

The invention belongs to the field of information classification, particularly relates to a text feature extraction method, system and device based on feature coding, and aims to solve the problems ofhigh operation complexity, low classification efficiency and low precision in text feature extraction. The method comprises: preprocessing an obtained text, and obtaining a word candidate feature sequence; generating a plurality of binary codes based on the word candidate feature sequence; screening binary codes by adopting a gene genetic algorithm to obtain optimal binary codes; and decoding theoptimal binary code to obtain an optimal word feature sequence and outputting the optimal word feature sequence. According to the method, a series of candidate features are converted into coding sequences easy to process, maximum global optimal selection is carried out on the features by using an automatic screening function of a gene genetic algorithm, and a minimum effective feature set can beeffectively screened out.

Description

technical field [0001] The invention belongs to the field of information classification, and in particular relates to a text feature extraction method, system and device based on feature coding. Background technique [0002] With the rapid development and popularization of Internet technology, in the face of the growing mass data, how to make full and effective use of it has become a top priority for major Internet companies and related scientific research institutions. Among these data, text data is the largest category. In the use of text data, classification occupies half of the country, which refers to the process of automatically determining the text category according to the text content under a given classification system. Today's text classification has a very wide range of application scenarios. For example, for a large number of news articles contained in news websites, these articles are automatically classified according to the subject matter based on the conten...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/35G06F17/27G06F17/22G06N3/00G06N3/12
CPCG06N3/006G06N3/126G06F40/12G06F40/289
Inventor 张旭熊彦钧何赛克刘春阳郑晓龙陈志鹏曾大军彭鑫
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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