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Unformatted text preview: selection pressure is nec-essary. Selection pressure is the driving force that determines the convergence rate of the GA population, in which the population converges to n identical (or very similar) individuals. Note that fast convergence may not necessarily lead to a better solution. Roulette wheel selection with replacement results in a higher selection pressure than binary tournament selection when there are some highly fit individ-uals in the population. On the other hand, when individuals’ fitnesses have a small variance, binary selection will apply a higher selection pressure....
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- Spring '08