Article View: comp.lang.java.programmer
Article #490Re: Genetic/Evolutionary Algorithms
From: Thomas G. Marshall
Date: Tue, 29 Nov 2005 15:29
Date: Tue, 29 Nov 2005 15:29
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2516 bytes
Daniel Dyer said something like: ...[rip]... > Without discriminating against weak candidates there > is no "natural" selection and therefore no pressure for the > population to improve. However, you have to be careful not to > completely discard weak candidates as they may have aspects that > don't score highly by themselves but prove useful when combined with > other material from other candidates. This is what makes the ranking model so very critical. In AL (my /enormous/ interest since 1981) the creatures have a similar ranking model, but IMO one that is far simpler to conceive. If they survive the battles against the environment (weather, food, predators) then they pass along their genetic information. This embodies the ranking. The "weak" candidates are not necessarily discarded, as they can often survive long enough to move to a more hospitable section, or have the predators around them evolve away from being interested in them for example. The weak candidates can then once in a while evolve into something far more interesting---something that would have been unlikely had we been left with the very best and brightest of the lot from the beginning.
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X-Google-Thread: 10a146,d4b477ed217848e9 X-Google-Thread: 108147,d4b477ed217848e9 X-Google-Attributes: gid10a146,gid108147,public X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news4.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!nx01.iad01.newshosting.com!newshosting.com!130.81.64.211.MISMATCH!cycny01.gnilink.net!spamkiller2.gnilink.net!gnilink.net!trndny04.POSTED!ab059812!not-for-mail From: "Thomas G. Marshall" <tgm2tothe10thpower@replacetextwithnumber.hotmail.com> Newsgroups: comp.lang.java.programmer,brasil.unix References: <1132910259.755488.102770@g49g2000cwa.googlegroups.com> <o7Kif.179069$Io.71590@clgrps13> <op.s0yyt3kqgnpvuy@cgl0517.chaucer.co.uk> <pPLif.140265$yS6.74381@clgrps12> <op.s0y4xzq5gnpvuy@cgl0517.chaucer.co.uk> Subject: Re: Genetic/Evolutionary Algorithms Lines: 25 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.2670 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 X-RFC2646: Format=Flowed; Response Message-ID: <bt_if.29$Yf2.8@trndny04> Date: Tue, 29 Nov 2005 15:29:11 GMT NNTP-Posting-Host: 68.239.33.207 X-Complaints-To: abuse@verizon.net X-Trace: trndny04 1133278151 68.239.33.207 (Tue, 29 Nov 2005 10:29:11 EST) NNTP-Posting-Date: Tue, 29 Nov 2005 10:29:11 EST