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

Table 3

Mean values and standard deviations of performance indicators on ZDT test instances.

Problems	Algorithm	GD	SP	HV	MS	IGD
ZDT1	SPEA2
		NSGA-II
	PESA-II
		MODEA
	AOSPEA
		ZDT2	SPEA2
	NSGA-II
			PESA-II
	MODEA
			AOSPEA
ZDT3	SPEA2
			NSGA-II
	PESA-II
			MODEA
	AOSPEA
		ZDT4	SPEA2
	NSGA-II
			PESA-II
	MODEA
			AOSPEA
ZDT6	SPEA2
			NSGA-II
	PESA-II
			MODEA
	AOSPEA