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Text TF-IDF feature reconstruction method combined with emotion intensity

A technology of TF-IDF and emotional intensity, which is applied in the classification field in natural language processing, can solve problems such as information confusion, information inaccuracy, and failure to retain, and achieve the effect of avoiding information confusion

Active Publication Date: 2019-08-06
TONGJI UNIV
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AI Technical Summary

Problems solved by technology

The Internet language represented by Weibo contains special language components such as expressions and user names. Existing methods do not deal with them, resulting in information confusion; elements such as negative words, degree adverbs, and repeated words in Chinese texts will directly affect the text. The emotional intensity and polarity of the existing method cannot retain this information, resulting in inaccurate information; in the test set and actual application, some new words that are not in the training set will be discarded by the existing method, resulting in loss of information

Method used

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  • Text TF-IDF feature reconstruction method combined with emotion intensity
  • Text TF-IDF feature reconstruction method combined with emotion intensity
  • Text TF-IDF feature reconstruction method combined with emotion intensity

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Embodiment

[0044] A text TF-IDF feature reconstruction method combined with emotional strength, first constructing a disabling dictionary, a degree dictionary and a negative dictionary. Stop words mainly include English characters, numbers, mathematical characters, punctuation marks, and single Chinese characters with high frequency, such as "you", "I", "because", "and" and so on; the degree dictionary includes a series of used The adverbs that modify the intensity of adjectives and adverbs and their corresponding emotional intensity, select the "Dictionary of Degree Level Words" released by HowNet in 2007 as the degree dictionary, and divide the degree adverbs into "extremely" , "Super", "Very", "Compare", "Slightly", and "Under", corresponding to six levels of 1.7, 1.5, 1.3, 1.1, 0.8 and 0.5 respectively; the negative dictionary contains "not", Common negative words such as "no", "non" and "weiwei". Such as figure 1 As shown, this method includes the following processes:

[0045] 1....

example 1

[0086] Example 1: @今天also like miuky you look so good today [happy][happy]

[0087]

[0088]

[0089] Compared with the traditional method, the user name "@今天also like miuky" and the expression "[happy]" are correctly segmented.

example 2

[0090] Example 2: I don't like driving

[0091] method Feature vector traditional method Drive: 0.89 Likes: 0.45 The method proposed by the present invention Like: -0.46 Drive: -0.89

[0092] Compared with the traditional method, the reconstructed feature vector preserves the information of the negative word "no".

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Abstract

The invention relates to a text TF-IDF feature reconstruction method combined with emotion intensity. According to the present invention, the expressions and the user names are extracted and segmentedthrough a regular matching method, the word intensity is corrected according to an intensity dictionary and the position relation of the negative words, the degree auxiliary words and the repeated words, and the new words are replaced through a synonym replacement method based on Word2Vec, so that the TF-IDF feature vectors of the text are reconstructed. Compared with the prior art, the TF-IDF features of the words are corrected by considering the conditions of negative words, degree auxiliary words, repeated words and the like, the information, such as the strength, positions, etc., of the words is reserved, the new words on the test set are replaced with the mature words appearing in the training set to enhance the generalization performance, and when the method is used, an original sentence can be directly used as input, and the manual word segmentation is not needed.

Description

technical field [0001] The invention belongs to the classification field in natural language processing, and relates to a text classification preprocessing method, in particular to a text TF-IDF feature reconstruction method combined with emotional intensity. Background technique [0002] In the current natural language processing and machine learning fields, Term Frequency–Inverse Document Frequency (TF-IDF) is commonly used to construct the feature vector of the text. The Internet language represented by Weibo contains special language components such as expressions and user names. Existing methods do not deal with them, resulting in information confusion; elements such as negative words, degree adverbs, and repeated words in Chinese texts will directly affect the text. The emotional intensity and polarity of the existing method cannot retain this information, resulting in inaccurate information; in the test set and actual application, some new words that are not in the tr...

Claims

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Application Information

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IPC IPC(8): G06F16/36G06F16/33G06F17/27
CPCG06F16/374G06F16/36G06F16/3344G06F40/284G06F40/247Y02D10/00
Inventor 邓修齐康琦张量
Owner TONGJI UNIV
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