Cluster-Based Multiobjective Particle Swarm Optimization and Application for Chemical Plants

Algorithm 2

Update external archive.

(1)	if
(2)	set temporary archive
(3)	else
(4)	set temporary archive
(5)	end if
(6)	for do
(7)	if
(8)	delete from
(9)	Sort in descending order by crowd-distance
(10)	Update the external archive with top solutions of