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Table 8 Results of each optimization method for a given number of holes. Values are ratios of the optimized values to the initial objective function, given as a value of 1 for the 0 number of new holes

From: Simulated Block Variance for 3D Drillhole Infill

Number of new holes Random search Simulated annealing with slow cooling Simulated annealing with fast cooling Simulated annealing with fast cooling–memory value Simulated annealing with slow cooling–memory value Particle swarm optimization–non-inertial Particle swarm optimization–inertial
0 1 1 1 1 1 1 1
1 0.9099 0.9257 0.9133 0.9099 0.8995 0.9173 0.9133
2 0.8246 0.8680 0.8074 0.8354 0.8028 0.8319 0.7964
3 0.7720 0.7448 0.7292 0.7369 0.7271 0.7275 0.7321
4 0.7064 0.6927 0.6664 0.6800 0.6600 0.6770 0.6489
5 0.6592 0.6652 0.6532 0.6436 0.5986 0.6555 0.6284
6 0.6079 0.6019 0.5563 0.5688 0.5558 0.5626 0.5678
7 0.5584 0.6137 0.5007 0.5910 0.5007 0.5353 0.5166
8 0.5654 0.5141 0.4649 0.4944 0.4562 0.4862 0.4948
9 0.5137 0.4807 0.4624 0.4374 0.4264 0.4570 0.4442
10 0.4929 0.4389 0.3981 0.4389 0.3981 0.4633 0.4296
11 0.4550 0.4181 0.3780 0.4181 0.3780 0.4000 0.4377
12 0.4659 0.4160 0.3620 0.3822 0.3604 0.3819 0.3790
13 0.4444 0.4016 0.3414 0.3795 0.3414 0.3321 0.3781
14 0.4158 0.3469 0.3518 0.3469 0.3518 0.3776 0.3576
15 0.4001 0.3831 0.2859 0.3831 0.2859 0.3372 0.3593
20 0.3398 0.2911 0.2341 0.2790 0.2341 0.2883 0.2711
25 0.2878 0.2477 0.2266 0.2421 0.2266 0.2468 0.2308
30 0.2621 0.2001 0.1752 0.2001 0.1752 0.2120 0.2335
35 0.2557 0.1873 0.1567 0.1873 0.1567 0.1805 0.1981
40 0.2439 0.1647 0.1485 0.1647 0.1485 0.1670 0.1817
45 0.2145 0.1881 0.1379 0.1881 0.1379 0.1615 0.1559
50 0.1982 0.1815 0.1270 0.1452 0.1230 0.1470 0.1547