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《Journal of Natural Disasters》 2015-02
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Interference prevention algorithm used for single station of earthquake early warning system

JIANG Wenxiang;YU Haiying;ZHAO Xiaofeng;XU Siming;Key Laboratory of Earthguake Engineering and Engineering Vibralion,Institute of Engineering Mechanics,China Earthquake Administration;  
Using information of single station to identify seismic events and interference in shorte time is a key issue in earthquake early warning system. Based on characteristic parameters of waveform,this paper studies the application of decision tree method for improving anti-interference ability of single station in earthquake early warning system. In order to study the influence of electromagnetic interference on earthquake early warning system,seven kinds of electromagnetic interference were tested in this paper. Five features(whether the event ended,Speed,Sparse,Pration,Symmetry) were extracted from waveform data in 3 seconds after event trigger,and relationship between feature values and the type of events was established by decision tree. The paper uses numerous strong-motion records and interference records(6359 seismic records and 163 interference records) to validate the trained decision tree,and the results show that this method achieves high recognition rate. This algorithm is easy to convert to IF-THEN rules and can easily be written in computer programs or expert system. This algorithm could be used as the seismic event detecting module for earthquake early warning or alarm system to improve their reliability.
【Fund】: 工程力学研究所基本科研业务费专项(2011D01 2014B02);; 地震行业科研专项(51308517 201008006);; 国家自然科学基金项目(201208014)
【CateGory Index】: P315.75-39
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