Research Article

Adaptive Black Hole Algorithm for Solving the Set Covering Problem

Table 9

Sampling phase: hardest instances for groups 4, 5, 6, A, and B.

Hardest instances Transfer functions Discretization methods
IDOptimum valuesStandardComplementStatic probabilityElitist

4.10514515514516515
516515515517
516516517514
515515515514
515516517516
514517515515
516517516515
514515516515

5.10265265267266266
265267266266
266266265265
265266265265
265267265268
265265267268
265268265266
265267267266

6.5161164163162162
162163163164
162163161164
164161162163
161164163161
161162163163
162163161163
162162161163

A.5236239238239238
238236238237
239237237237
236238236237
239236237239
236239237238
236237239237
238239239237