function [f]=ELD(x)
c1=0.00128*x(1)*x(1)+6.48*x(1)+459;
c2=0.00194*x(2)*x(2)+7.85*x(2)+310;
c3=0.00482*x(3)*x(3)+7.97*x(3)+78;
f=c1+c2+c3;
