Method for extracting road traffic information from Internet unstructured text

Abstract

The invention provides a method for extracting road traffic information from an Internet unstructured text. The method comprises the steps of defining a data structure of the road traffic information and a description feature word type of the road traffic information, expanding a few manually-established basic extraction modes to obtain an extraction mode bank, generating a feature word type sequence after the input Internet unstructured text is preprocessed, obtaining a matched extraction mode of the input text according to the similarity of the feature word type sequence, utilizing the matching extraction mode for extracting a positioning information element and a type information element of the road traffic information from the Internet unstructured text, utilizing a regular expression and a judgment rule for extracting a time information element from the input text, and obtaining the road traffic information through the combination of the positioning information element, the type information element and the time information element. By the means of the method for extracting the road traffic information from the Internet unstructured text, real-time processing can be carried out on the unstructured text collected from the Internet, the road traffic information can be extracted, and the traffic information collecting means are enriched.

Description

technical field [0001] The invention relates to the field of traffic information, in particular to a method for extracting road traffic information from Internet unstructured text. Background technique [0002] The continuous increase in the number of motor vehicles in cities has made urban road traffic problems increasingly prominent, and the public's demand for real-time road traffic information is also more urgent. Road traffic information mainly includes road traffic flow, road conditions, traffic restrictions, traffic control, traffic events, traffic weather and road surface environment information. Existing real-time road traffic information collection technologies, such as fixed sensor technology (induction coil, video surveillance and microwave detection), floating vehicle technology with GPS and wireless communication equipment, mobile communication terminal signaling analysis technology, etc. It has been widely used, but it cannot collect road traffic information ...

AI Technical Summary

Problems solved by technology

However, the existing road traffic information system can only deal with structured data expressed in two-dimensional form, and it is necessary to use information extraction technology to extract structured road traffic information from unstructured text on the Internet

The existing information extraction technology does not consider the characteristics of road traffic information description, cannot correctly identify the road location description information based on the linear reference method from the Internet unstructured text, and lacks the ability to deal with the hidden road traffic information elements in the Internet unstructured text description. Ability to include and omit phenomena

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