A Novel Approach for Blast-Induced Flyrock Prediction Based on Imperialist Competitive Algorithm and Artificial Neural Network

Table 2

Mean and minimum cost of imperialists for different models.

Model number	Country/imperialist	Number of countries	Number of imperialists	Mean cost of imperialists	Minimum cost of imperialists	Coefficient of determination	Root mean square error
1	2.7	8	3	0.073	0.073	0.880	0.241
2	4.0	16	4	0.074	0.074	0.882	0.240
3	4.8	24	5	0.078	0.078	0.856	0.250
4	5.3	32	6	0.092	0.092	0.842	0.255
5	5.7	40	7	0.075	0.073	0.878	0.241
6	6.0	48	8	0.079	0.070	0.896	0.235
7	6.2	56	9	0.063	0.063	0.924	0.224
8	6.4	64	10	0.080	0.073	0.878	0.241
9	6.5	72	11	0.075	0.069	0.899	0.233
10	6.7	80	12	0.077	0.071	0.892	0.236
11	6.8	88	13	0.079	0.074	0.876	0.242
12	6.9	96	14	0.083	0.063	0.922	0.224
13	6.9	104	15	0.083	0.064	0.920	0.225
14	7.0	112	16	0.077	0.070	0.894	0.235
15	7.1	120	17	0.082	0.072	0.886	0.238
16	7.1	128	18	0.077	0.065	0.913	0.228
17	7.2	136	19	0.078	0.063	0.931	0.225
18	7.2	144	20	0.078	0.068	0.899	0.234
19	7.2	152	21	0.079	0.067	0.902	0.232
20	7.3	160	22	0.075	0.067	0.906	0.231