Multiobjective Optimization Method for Polymer Injection Molding Based on a Genetic Algorithm

Algorithm 1

Selection tournament.

Input playerlist // The list of athletes includes the ‘nParents’ groups, and each group

has ‘tournamentSize’ athletes.

for i=1 to nParents

 winner=plyer

for j=2 to tournamentSize

 if rank(j)<rank(j-1)

winne(i)r=player(j)  // Athletes with small rank win, winners in group i are marked

as winner(i)

end if

if rank(j)=rank(j-1)

 if distance(j)>distance(j-1)

  winner(i)=player(j) //Individuals with greater crowding distance win,when they

have the same order value

 end if

end if

end for

Output winner