基于BP神经网络的风速观测资料序列订正模型

Sequence correction model for wind speed observation data based on the BP neural network

利用甘肃省河西地区敦煌、酒泉、民勤3个站点2004-2007年自动观测与同期人工观测系统的风速观测资料,采用BP神经网络建立了人工观测风速观测资料序列的订正模型,并进行了模拟效果检验.结果表明:利用BP神经网络建立的订正模型能对风速观测资料进行较高精度的订正,3个站点风速拟合差值相对于原差值明显减小,订正结果与自动观测资料的相关系数均在0.90以上.各个站点的平均相对误差较小,在12%以下,且订正模型的稳定性和可扩展性较好;各个站点的平均相对均方根差为3.20～3.84,效果良好,可为建立均一性时间序列的风速观测资料提供参考.

Using automatic and manual observation wind data from Dunhuang,Jiuquan and Minqin of Hexi area of Gansu Province from 2004 to 2007,a correction model for manually observed wind data sequence was established based on the BP neural network and the simulation effect was tested.The results show that the correction model based on the BP neural network gave a more accurate revision of the wind data.The fitting difference of wind speed was significantly reduced compared with the original difference.The correlation coefficient of the revised results and the automatic observation data were above 0.90 and the average relative error was smaller,i.e.below 12%.The stability and expandability of the correction model was better,the average relative root mean square error was 3.20～3.84 and the effect was good.This correction model can provide a reference for establishing the homogeneity of time series of wind data.