摘要
作者在分析了影响汛前和汛后潼关高程变化值的因素的基础上,利用改进BP网络模型对非特征汛期和汛期潼关高程的变化值进行了计算。计算中不采用潼关的绝对高程,而用高程的变化量作为网络的较出物正量,从而减少计算误差,同时又能客观地考虑各影响因子的作用。改进后的BP模型学习时间短,精度满足要求。用该模型计算的潼关高程变化趋势与实际水库调度运行中的高程基本吻合。
On the basis of the analysis of factors affecting the riverbed elevation at Tongguan section of Wei River in Sanmenxia reservoir,the improved BP network model is applied to calculate the variation of the elevation in flood season and dry season respectively.In the model,instead of absolute elevation the variation of elevation is adopted as the output characteristic quantity of the network.For this reason,the calculation error is reduced and the influences of the factors affecting the elevation can be taken into account objectively.The predicted elevation variation is in good agreement with the observation data.
出处
《水利学报》
EI
CSCD
北大核心
2003年第8期96-100,共5页
Journal of Hydraulic Engineering
基金
国家自然基金资助项目(59979020)
教育部青年骨干教师基金资助
关键词
BP网络模型
高程变化量
三门峡
潼关
库区
预测
汛期
improved BP network model
variation of riverbed elevation
Tongguan river section
Sanmenxia hydro project
