Research Article
Intelligent Warehouse Robot Scheduling System Using a Modified Nondominated Sorting Algorithm
Table 3
Experimental results of IGD on several DTLZs (mean and standard deviation).
| Problem | M | NSGAII | IBEA | MBNSGAII |
| DTLZ1 | 2 | 2.2068e-3 (7.35e-5) - | 7.9965e-2 (7.99e-3) - | 2.0230e-3 (5.45e-5) | 3 | 2.8447e-2 (1.33e-3) - | 1.6616e-1 (2.51e-2) - | 2.2376e-2 (3.68e-4) | 5 | 1.7146e-1 (1.25e-1) - | 1.8372e-1 (2.16e-2) - | 5.1833e-2 (3.37e-4) |
| DTLZ2 | 2 | 5.0483e-3 (1.75e-4) + | 1.6671e-2 (1.60e-3) - | 8.5238e-3 (2.92e-4) | 3 | 7.3058e-2 (2.57e-3) = | 8.4162e-2 (2.51e-3) - | 7.3973e-2 (1.57e-3) | 5 | 2.0563e-1 (4.67e-3) - | 1.9251e-1 (1.54e-3) - | 1.7906e-1 (2.44e-3) |
| DTLZ3 | 2 | 7.1268e-3 (1.39e-3) + | 3.3913e-1 (8.73e-3) - | 9.8870e-3 (1.10e-3) | 3 | 1.4200e-1 (2.06e-1) = | 4.7891e-1 (4.51e-3) - | 7.8834e-2 (2.64e-3) | 5 | 7.5535e-1 (7.31e-1) - | 5.9365e-1 (9.76e-3) - | 1.8301e-1 (2.58e-3) |
| DTLZ4 | 2 | 1.5241e-1 (3.11e-1) - | 4.5174e-1 (3.75e-1) - | 8.1849e-2 (2.32e-1) | 3 | 1.5811e-1 (2.77e-1) + | 8.2918e-2 (2.68e-3) = | 2.6157e-1 (2.41e-1) | 5 | 2.0630e-1 (3.41e-3) - | 2.1267e-1 (7.27e-2) - | 1.8232e-1 (1.93e-3) |
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