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Article topic keyword extraction method and apparatus based on low-rank matrix decomposition

A low-rank matrix and extraction method technology, applied in the field of article topic keyword extraction based on low-rank matrix decomposition, can solve problems such as heavy workload

Inactive Publication Date: 2016-08-31
BEIJING JIAOTONG UNIV +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

There are some content related to pornography, horror and some other bad Weibo, manual control, huge workload

Method used

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  • Article topic keyword extraction method and apparatus based on low-rank matrix decomposition
  • Article topic keyword extraction method and apparatus based on low-rank matrix decomposition
  • Article topic keyword extraction method and apparatus based on low-rank matrix decomposition

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Embodiment 1

[0069] The embodiment of the present invention provides a flow chart of a method for extracting article topic keywords based on low-rank matrix decomposition. figure 1 As shown, the method includes the following steps:

[0070] Step S110: Perform data preprocessing of cleaning, word segmentation, and removal of stop words on the text in the article to be processed, so as to obtain text that is convenient for keyword extraction of subsequent events. The aforementioned articles may be news, microblogs, blogs, comments, etc.

[0071] In the text preprocessing stage, the present invention mainly performs the following text preprocessing: remove URL links, emoticons, and invalid characters in the article text; since there are no spaces between Chinese words, word segmentation of the text is required before keyword extraction , the present invention uses an open source natural language processing toolkit with good effect——HanLP to carry out word segmentation; then remove stop words...

Embodiment 2

[0097] This embodiment provides a device for extracting article topic keywords based on low-rank matrix decomposition. The specific structure of the device is as follows: image 3 shown, including:

[0098] The data preprocessing module 31 is used to represent the word as a real value vector. Before the text after the preprocessing of the tool training data, it also includes: performing data preprocessing on the article text to be processed, the data preprocessing includes cleaning, word segmentation, and removing stops. use words.

[0099] The word vectorized file generation module 32 is used to use the article text after the tool training data preprocessed to represent the word as a real value vector to obtain the word vectorized file, which includes a plurality of word vectors, and the word vectorized file includes a plurality of word vectors. Contains keywords and non-keywords;

[0100]The keyword matrix building module 33 is used to use the keyword extraction algorithm ...

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Abstract

Embodiments of the present invention provide an article topic keyword extraction method and apparatus based on low-rank matrix decomposition. The method mainly comprises training an article text after data pre-processing by using a tool representing words as real-value vectors, obtaining a word vectorization file, extracting keywords of each event of a specific topic in the article text after data pre-processing by using a keyword extraction algorithm based on a text graph model, querying the word vectorization file according to the extracted keywords, and establishing a keyword matrix of the specific topic; and solving the low-rank decomposition problem of the keyword matrix by using an augmented lagrange multiplier algorithm, obtaining a keyword low-rank matrix, and finally generating the keywords of the specific topic in the article text after data pre-processing. The keywords of article topics in microblogs are generated by using the low-rank matrix decomposition method, the sparsity problems of the article topic keywords in microblogs is effectively solved, and interference of non-keyword data noise is largely reduced.

Description

technical field [0001] The invention relates to the technical field of article keyword extraction, in particular to a method and device for extracting article topic keywords based on low-rank matrix decomposition. Background technique [0002] Now that we have entered the era of Web 3.0, information is growing exponentially, how to improve the efficiency of information access has become an increasingly important issue. In order to effectively organize, compress and retrieve massive information, people urgently hope to summarize or index the information well through several words. The emerging media represented by Weibo has become an important channel for people to communicate and share. A keyword extraction system is of great significance to how to quickly find topics that users are interested in and how to supervise the content of topics. [0003] Compared with traditional news texts, microblog texts have fewer words, and there are more types of microblog topics, and the ...

Claims

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Application Information

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IPC IPC(8): G06F17/27G06F17/30
CPCG06F16/3335G06F16/3344G06F40/30
Inventor 郎丛妍何伟明于兆鹏冯松鹤王涛杜雪涛张晨
Owner BEIJING JIAOTONG UNIV
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