By contrast crossover explores the points dened by the

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: e values at these 2 posi/ons are converged. •  How to fix this? •  Muta/on may explore the search space without limita/on. Sphere func/on: f(x1,x2)=x1^2+x2^2  ­5.12<=x1<=5.12  ­5.12<=x2<=5.12 4.88 2.88  ­5.12 p P’ 0.88 x2 •  Crossover does not introduce new gene values to the popula/on, but reshuffle the exis/ng genes within the popula/on in different ways. •  Gene values are associated with posi/ons: Crossover or Muta/on  ­3.12  ­ ­1.12 1.12 0.88  ­3.12 P’  ­5.12 x1 2.88 P’’ 4.88 P=(0.6,1.3) Muta/on rate=1/L P’=(0.6, ­1.8) P’=(3,1.3) Muta/on rate=2/L P’’=(3,1.8) Crossover or Muta/on  ­ Con/nued Crossover or Muta/on  ­ Con/nued •  In prac/ce, muta/on explores its neighborhood, defined by its step size s, which can be adjusted for global or local search. •  By contrast, crossover explores the points defined by the pare...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online