Investigation of Three-Dimensional Condensation Film Problem over an Inclined Rotating Disk Using a Nonlinear Autoregressive Exogenous Model

Table 6

Results of performance function in terms of mean square error (MSE) and gradient values with different activation functions for condensation film problem with and .

	Log-sigmoid				Tan-hyperbolic
	Mean square error		Gradient		Mean square error		Gradient
	n = 60	n = 30	n = 60	n = 30	n = 60	n = 30	n = 60	n = 30
	5.92E − 15	9.32E − 14	8.43E − 11	2.53E − 09	2.14E − 12	1.50E − 11	5.18E − 10	5.24E − 10
	1.35E − 14	6.03E − 14	5.19E − 11	5.03E − 11	8.44E − 13	1.39E − 14	1.77E − 10	6.64E − 11
	6.58E − 12	3.83E − 12	6.40E − 11	5.20E − 08	3.66E − 12	1.94E − 10	4.12E − 09	9.02E − 10
	2.57E − 13	1.48E − 10	1.03E − 10	3.47E − 11	3.40E − 12	1.85E − 10	7.69E − 10	6.28E − 11
	1.34E − 10	6.35E − 09	2.46E − 10	8.92E − 09	1.04E − 08	1.04E − 08	8.93E − 09	9.15E − 09