In the linear perturbation Model(LPM),the ordinary lest squares (OLS) method is used in order to obtain the multi-regression cofficients (nonparametric unit hydrograph) of the conuolution summatron of the input and output departures.

• 在线性扰动模型(LPM)中,输入和输出离均差的卷积求和是采用最小二乘法(OLS)求解,以得到非参数单位线纵标即回归系数。