Table 3.

Optimized structure of ICA–ANN model

No.	Models’ name	ANN features					Utilized initialization parameters in ICA
		Number of input	Number of output	Number of hidden layer	Number of nodes in hidden layer	Transfer function	Number of country	Number of imperialist	Number of decade
1	50GEN_2IN	2	1	2	3-2	tansig	300	20	50
2	50GEN_3IN	3	1	2	4-3	tribas	200	25	50
3	50GEN_4IN	4	1	1	9	satlins	400	40	50
4	100GEN_2IN	2	1	1	5	satlins	300	30	100
5	100GEN_3IN	3	1	1	7	tansig	400	40	100
6	100GEN_4IN	4	1	2	6-3	tansig	500	50	100
7	150GEN_2IN	2	1	1	5	poslin	400	20	150
8	150GEN_3IN	3	1	1	7	hardlims	250	25	150
9	150GEN_4IN	4	1	1	9	purelin	450	45	150
10	200GEN_2IN	2	1	1	4	tribas	600	60	200
11	200GEN_3IN	3	1	1	7	satlins	250	25	200
12	200GEN_4IN	4	1	3	3-3-3	poslin	500	50	200
13	250GEN_2IN	2	1	1	5	logsig	500	50	250
14	250GEN_3IN	3	1	2	4-3	radbas	250	25	250
15	250GEN_4IN	5	1	2	5-4	tansig	400	50	250