warm? high? serious? Maybe Bob can post an example of what he considers a
fuzzy rule.
Bill Silvert
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Friday, August 07, 2009 3:53 AM
Subject: Re: [ECOLOG-L] Fuzzy Logic in Ecology
William Silvert wrote:
I missed Wayne's posting since the subject line had nothing to do with
fuzzy logic, and although I know that I will raise a chorus of outrage I
am changing the subject line.
Quite a few papers on fuzzy logic aplications have been published, many
in Ecological Modelling (including a couple of my own). I also have some
PowerPoint presentations on my website, http://ciencia.silvert.org, and
there are many in related fields such as soil science. I think that one
of my first efforts was in niche theory, obviously the
"multi-dimensional manifold" that Hutchinson defined must have fuzzy
boundaries.
Unfortunately a lot of work in the field seems to consist of lots of
mathematics with little biological content. I like to think in terms of
fuzzy rules like
IF the weather is warm AND nutrient levels are high THEN there is a
serious risk of bottom anoxia
In what way is that fuzzy logic? The truth value of the statement above,
Pr(Z|X & Y) > Pr(Z|!(X & Y))
is surely 1. Where is the fuzzy logic element?
I'm confused.
Bob
--
Bob O'Hara
Department of Mathematics and Statistics
P.O. Box 68 (Gustaf Hällströmin katu 2b)
FIN-00014 University of Helsinki
Finland
Telephone: +358-9-191 51479
Mobile: +358 50 599 0540
Fax: +358-9-191 51400
WWW: http://www.RNI.Helsinki.FI/~boh/
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Journal of Negative Results - EEB: www.jnr-eeb.org
