It is worth looking at "Simulated Annealing": http://en.wikipedia.org/wiki/Simulated_annealing http://en.wikipedia.org/wiki/Simulated_annealing Start your opt

It is worth looking at "Simulated Annealing": http://en.wikipedia.org/wiki/Simulated_annealing http://en.wikipedia.org/wiki/Simulated_annealing Start your optimization process with a high "temperature" (leading to big changes), and let it "cool" over subsequent iterations.