The ANN model,the piecewise linear interpolation model and the nonlinear regression model are compared in principle.The ANN model is easy to construct the complex relationships between the various in-fluencing factors and dependent variables.The nonlinear regression model and the piecewise linear interpola-tion model can intuitively express the relationship between the independent and dependent variables through expressions.Taking the relationship between the diversion flow rate through the three outlets of Jingjiang River and the flow rate at Zhicheng station as an application example,the correlation coefficient,Nash efficiency co-efficient,root mean square error and mean absolute error are used to compare the prediction accuracy and error of the three models.The results show that all the three models can be applied to simulate the relationship be-tween flow rates through the three diversion outlets and at the main channel of Jingjiang River.However,based on the four evaluation indexes,the error between the measured value and calculated value by the ANN model is the smallest,followed by the piecewise linear interpolation model,and the calculation accuracy of the regression model is relatively low.
关键词
ANN模型/非线性回归模型/分段线性插值模型/荆江河段/三口分流
Key words
ANN model/nonlinear regression model/piecewise linear interpolation model/Jinjiang River/the three diversion outlets
维普
万方数据