Mutation rate changing
Kian H Low
uceckil at ucl.ac.uk
Tue Oct 22 05:07:28 EDT 2002
Can you please share how one could change the mutation rate during the
Murat Saginc wrote:
> i would suggest rethinking that statement about 100%
> mutation rate for starters. The mutation rate aims at
> bringing diversity to the population once the
> population starts converging towards a certain part of
> the search space. You should employ crossover
> initially to make use of the inherent diversity you
> have at the initial populations due to random
> initialization at the start till crossover has no more
> diversity to employ at which point you need to start
> using mutation more heavily to bring diversity in. So
> use xover 1st to make use of already existing
> diversity then mutation to introduce diversity once
> xover no longer has any functionality since it starts
> crossing between members of the search space that
> whirl around the same area. Trying looking into
> Whitley's papers available at the nec computer science
> repository and De Jong's thesis at his webpage.
> murat saginc
> --- Finger <fpaint at newmail.ru> wrote:
> > Hello!
> > I have some question about changing of the mutation
> > rate during GA proccess.
> > In a simple GA with a high genome length and a not
> > so large population size
> > the mutation rate must to be near to 100% at the
> > begin of the proccess and
> > as small as a zero at the end, otherwise the procces
> > will be too long and
> > pearhaps will don't find the optimal solution. Where
> > I can find some kind of
> > algorithm of current mutation rate calculating? I
> > guess it will depend on
> > the population properties such as fitness variety.
> > With best regards, Finger.
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Kian H Low
Chemical Engineering, UCL, Torrington Place, London WC1E 7JE U.K.
020 76793836 / 020 85561276(H) / 07736410617(M)
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