An Adaptive Reference Vector Adjustment Strategy and Improved Angle-Penalized Value Method for RVEA

Algorithm 3

Environmental selection.

	Input:; population size ; the combined population ;
	Output: new population ;
(1)
(2)	Calculate the ideal point for
(3)	fordo
(4)
(5)	fordo
(6)
(7)
(8)	Calculate the improved APD method for each solution in
(9)	whiledo
(10)	fordo
(11)	ifthen
(12)	Selected the solution with the minimum improved APD method into ;
(13)	Remove the solution from ;