An Assessment of a Proposed Hybrid Neural Network for Daily Flow Prediction in Arid Climate

Table 3

Developed configurations of MNNs for Roodan watershed.

Architecture	Hidden layer 1			Output layer
	Module	Transfer function	Training algorithm	Transfer function	Training algorithm
1	Module 1	Sigmoid	*Levenberg-Marquardt or momentum	Sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Sigmoid
2	Module 1	Sigmoid	*Levenberg-Marquardt or momentum	Linear sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Sigmoid
3	Module 1	Sigmoid	*Levenberg-Marquardt or momentum	Linear	*Levenberg-Marquardt or momentum
	Module 2	Sigmoid
4	Module 1	Linear sigmoid	*Levenberg-Marquardt or momentum	Sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Linear sigmoid
5	Module 1	Linear sigmoid	*Levenberg-Marquardt or momentum	Linear sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Linear sigmoid
6	Module 1	Linear sigmoid	*Levenberg-Marquardt or momentum	Linear	*Levenberg-Marquardt or momentum
	Module 2	Linear sigmoid
7	Module 1	Linear	*Levenberg-Marquardt or momentum	Sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Linear
8	Module 1	Linear	*Levenberg-Marquardt or momentum	Linear sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Linear
9	Module 1	Linear	*Levenberg-Marquardt or momentum	Linear	*Levenberg-Marquardt or momentum
	Module 2	Linear
10	Module 1	Sigmoid	*Levenberg-Marquardt or momentum	Sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Linear sigmoid
11	Module 1	Sigmoid	*Levenberg-Marquardt or momentum	Linear sigmoid	*Levenberg-Marquard or momentum
	Module 2	Linear sigmoid
12	Module 1	Sigmoid	*Levenberg-Marquardt or momentum	Linear	*Levenberg-Marquardt or momentum
	Module 2	Linear sigmoid
13	Module 1	Sigmoid	*Levenberg-Marquardt or momentum	Sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Linear
14	Module 1	Sigmoid	*Levenberg-Marquardt or momentum	Linear sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Linear
15	Module 1	Sigmoid	*Levenberg-Marquardt or momentum	Linear	*Levenberg-Marquardt or momentum
	Module 2	Linear
16	Module 1	Linear sigmoid	*Levenberg-Marquardt or momentum	Sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Linear
17	Module 1	Linear sigmoid	*Levenberg-Marquardt or momentum	Linear sigmoid	*Levenberg-Marquardt or momentum
	Module 2	Linear
18	Module 1	Linear sigmoid	*Levenberg-Marquardt or momentum	Linear	*Levenberg-Marquardt or momentum
	Module 2	Linear

∗For every configuration, both training algorithms, Levenberg-Marquardt and momentum, were examined separately for hidden and output layers.