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Objective approach for rainstorm based on dual-factor feature extraction and generalized regression neural network

Author

Listed:
  • Huang Xiaoyan

    (Guangxi Institute of Meteorological Science, Nanning China)

  • He Li

    (Guangxi Institute of Meteorological Science, Nanning China)

  • Zhao Huasheng

    (Guangxi Institute of Meteorological Science, Nanning China)

  • Huang Ying

    (Guangxi Institute of Meteorological Science, Nanning China)

  • Wu Yushuang

    (Guangxi Institute of Meteorological Science, Nanning China)

Abstract

Rainstorm often causes inland flooding and mudslides that threaten lives and properties. In this study, rainstorm is used as a forecasting object, and an interpretation prediction model for rainstorm based on the European Center for medium-range weather forecasting (ECMWF) numerical prediction model is constructed through the generalized regression neural network method. Model inputs are forecasted through principal component analysis, and dual-factor feature extraction is performed on the primary predictors to obtain new irrelevant variables and optimize network structures. The experimental forecast results of the 24 h aging test using an independent sample of large-scale rainstorm in Guangxi, China from 2012 to 2016, the actual forecast results of selected rainstorm cases with great influence on Guangxi, and different influencing systems show that the new prediction scheme is sophisticated. Thus, the scheme has a certain universal applicability. The results of the comparative analysis between the new program and ECMWF show that the forecasting ability of the new method is more accurate than that of the direct numerical forecasting model. The threat score of the new forecast model for 5 years has a 58.4% increase relative to that of the ECMWF. The forecasting skills are positive and good and can thus improve the rainstorm forecasting ability of ECMWF and provide a better guidance for forecasters.

Suggested Citation

  • Huang Xiaoyan & He Li & Zhao Huasheng & Huang Ying & Wu Yushuang, 2020. "Objective approach for rainstorm based on dual-factor feature extraction and generalized regression neural network," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 104(3), pages 1987-2002, December.
    • Handle: RePEc:spr:nathaz:v:104:y:2020:i:3:d:10.1007_s11069-020-04258-4
    DOI: 10.1007/s11069-020-04258-4
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    References listed on IDEAS

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    1. Peter Bauer & Alan Thorpe & Gilbert Brunet, 2015. "The quiet revolution of numerical weather prediction," Nature, Nature, vol. 525(7567), pages 47-55, September.
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