[Retracted] An Improved SPEA2 Algorithm with Adaptive Selection of Evolutionary Operators Scheme for Multiobjective Optimization Problems

Figure 8

Nondominated solutions obtained by SPEA2 (left), NSGA-II (second from left), PESA-II (third from left), MODEA (forth from left), and AOSPEA (right) on LZ09 test instances.

(a) LZ09_F2

(b) LZ09_F4

(c) LZ09_F5

(d)