569784.fig.0012a
(a)
569784.fig.0012b
(b)
569784.fig.0012c
(c)
569784.fig.0012d
(d)
Figure 12: Pareto fronts obtained by NSABC, MOABC, MOCLPSO, and NSGA-II on ZDT6 after 20000 FEs.