Device and method for identifying and evaluating emergency hot topic

A technology for emergencies and hot topics, applied in special data processing applications, instruments, electrical and digital data processing, etc. Efficiency, the effect of reducing computational time and space complexity

Inactive Publication Date: 2013-02-20
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, news reports on emergencies, especially major emergencies, have special attributes, and no special and targeted treatment methods have been proposed so far.

Method used

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  • Device and method for identifying and evaluating emergency hot topic
  • Device and method for identifying and evaluating emergency hot topic
  • Device and method for identifying and evaluating emergency hot topic

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Experimental program
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Embodiment Construction

[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] Reference figure 1 , Introduces the structural composition of the hot topic and evaluation device of emergencies: there are four components: text acquisition unit, text representation unit, topic clustering unit and topic evaluation unit. The innovation of the present invention mainly focuses on text acquisition and text representation And topic assessment in three units. The following are introduced separately:

[0044] (A) Text acquisition unit: After an emergency occurs, collect news report pages related to the hot topic of the emergency from major news websites and perform text processing to form a set of news documents and store them in the main text database. Three units of text representation, topic clustering and topic evaluation are provided for sub...

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Abstract

The invention relates to a device and a method for identifying and evaluating an emergency hot topic. The device is provided with four component parts including a text acquisition unit, a text expression unit, a topic clustering unit and a topic evaluation unit. The device and the method are characterized in that only a title, introduction, relevant features and other information of a text of a news report are extracted and regarded as an effective sample set identified by the hot topic. Compared with the existing full text extraction, the experiment result shows that the result of the existing full text extraction is similar to the result of the partial text extraction, but the operation of the device and the method is greatly simplified. Compared with a classical model, an improved feature weight calculation model is good in execution efficiency and strong in adaptability of text representation capability. The model is used for evaluating the hot value of clustered topics, and the calculated hot topic accords with the expected effect and is adaptive to the features of the emergency news report. In a word, in the process of processing the text of the emergency news report, the device and the method have good performance in aspects of calculation complexity, result accuracy and timeliness.

Description

Technical field [0001] The present invention relates to topic detection and tracking technology in the field of text data mining. Specifically, it relates to a method of identifying hot topics related to the emergency from the text of Internet-related news reports after an emergency occurs, and The device and method for evaluating the popularity of the identified hot topic are used to provide a method for identifying and evaluating the hot topic for follow-up tracking of the hot topic, which belongs to the technical field of Internet topic detection and tracking (TDT). Background technique [0002] Topic detection and tracking TDT technology is a kind of information processing technology, which aims to organize and utilize the information flow of language and text based on events. It is also an applied research to deal with the problem of information overload. The objects detected and tracked by TDT include events at a specific time and place, to topics with more relevant extensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 陈莉萍杜军平宋茂强
Owner BEIJING UNIV OF POSTS & TELECOMM
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