Dempster-shafer (D-S) evidence theory method capable of achieving micro-blog inclusion traffic information fusion

A technology of traffic information and evidence theory, applied in the field of mobile location services, can solve problems such as ambiguity and differences in microblog message descriptions, and achieve the resolution of information collection contradictions, semantic understanding difficulties, and enriched semantic understanding processes Effect

Inactive Publication Date: 2013-01-02
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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AI Technical Summary

Problems solved by technology

Therefore, text clustering cannot well solve the ambiguity of microblog message descriptions and the differences in message descriptions of different microblog users.

Method used

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  • Dempster-shafer (D-S) evidence theory method capable of achieving micro-blog inclusion traffic information fusion
  • Dempster-shafer (D-S) evidence theory method capable of achieving micro-blog inclusion traffic information fusion
  • Dempster-shafer (D-S) evidence theory method capable of achieving micro-blog inclusion traffic information fusion

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Embodiment Construction

[0042] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.

[0043] Such as figure 1 As shown, it is a flow chart of a D-S evidence theory method for microblog containing traffic information fusion according to an embodiment of the present invention, including the following steps:

[0044] Step 101, according to the degree of traffic congestion, determine the evidence theory identification framework Θ and proposition space 2 Θ ;

[0045] Step 102, according to the effective time window T interval and the road network section road, grab the microblog content related to the traffic information topic, and form the microblog data set V that needs to be integrated;

[0046] Step 103, microblog information V i Preprocessing operations, including natural language word segmen...

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Abstract

The invention discloses a Dempster-shafer (D-S) evidence theory method capable of achieving micro-blog inclusion traffic information fusion. The D-S evidence theory method includes determining an evidence theory identification framework and proposition space according to traffic congestion degrees; capturing micro-blog contents relevant to traffic information themes according to time windows and road sections to form a micro-blog data collection which is required to be fused; pre-processing the micro-blog data collection; calculating word meaning similarity degrees of description vocabularies of micro-blog data collection traffic states, introducing Chinese language corpus resources and improving calculation accuracy of the word meaning similarity degrees; calculating weighting evaluation of the micro-blog word meaning similarity degrees and constructing a basic probability assignment function of an evidence theory; and subjecting a plurality of micro-blog evidence sources to evidence synthesis according to a Dempster combination rule, determining confidence intervals of propositions in the identification space, and selecting a proposition of the maximum confidence function in the confidence intervals to be a fusion result. By means of the D-S evidence theory method capable of achieving micro-blog inclusion traffic information fusion, the fusion of micro-blog inclusion traffic information can be achieved, and an important data source is provided for the city traffic information collection.

Description

technical field [0001] The invention relates to mobile location service, Internet space information search, and mobile Internet technology, in particular to a D-S evidence theory method for fusion of traffic information contained in microblogs. Background technique [0002] Real-time traffic information can alleviate traffic congestion, improve transportation efficiency, ensure traffic safety, and facilitate public travel. The existing methods of obtaining traffic information mainly include fixed sensor technology (induction coils, video surveillance, and microwave detection), and the installation of GPS and wireless communication equipment. However, these collection methods still have great limitations in obtaining temporary traffic control restriction information and responding to sudden traffic incidents. Microblogs contain a wealth of real-time traffic information with high timeliness, covering various types of traffic information, such as road traffic flow, road smoothn...

Claims

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Application Information

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IPC IPC(8): G06F17/30G06F17/27
Inventor 陆锋张恒才
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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