Ada informasi terbaru dari Bapak Anto S. Nugroho, pencetus softcomputing Indonesia, tentang tulisan Zadeh pagi ini di milis BISC.
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Berkeley Initiative in Soft Computing (BISC)
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Dear Members of the BISC Group,
There are many misconceptions about fuzzy logic. The following may
help to clarify what fuzzy logic is and what it has to offer.
Fuzzy logic is not fuzzy. Like traditional logical systems, fuzzy
logic is precise. In large measure, fuzzy logic is designed to address
an important class of problems which are not addressed by traditional
logical systems–problems in which the central issues relate to
imprecision, uncertainty, incompleteness of information, unreliability
and partiality of truth. The importance of fuzzy logic derives from
the fact that in much of the real world such problems are the norm
rather than exception. Here are a few examples of simple problems
which are not addressed by traditional logical systems.
Most Swedes are tall
Most tall Swedes are blond
What fraction of Swedes are blond?
Most Swedes are tall
What is the average height of Swedes?
Most Swedes are tall
What is the truth value of “Many Swedes are not tall”?
X is the value of a real-valued variable. What is known about X
is: (a) X is larger than approximately a; (b) X is smaller than
approximately b. What is the probability that X is approximately c?
f is a function from reals to reals, Y=f(X). A linguistic summary
of f is described as a collection of fuzzy if-then rules:
if X is small then Y is small
if X is medium then Y is large
if X is large then Y is small
What is the value of Y if X is larger than approximately a and
smaller than approximately b?
f is a function from reals to reals which is described as a
collection of fuzzy if-then rules:
if X is small then usually (Y is small)
if X is medium then usually (Y is large)
if X is large then usually (Y is small)
What is the value of Y if usually (X is medium)?
Pose these problems to those who claim that anything that can be
done with fuzzy logic can be done equally well without fuzzy logic.
Regards to all,
Lotfi
Comments are invited.
–
Lotfi A. Zadeh
Professor in the Graduate School
Director, Berkeley Initiative in Soft Computing (BISC)
Address:
729 Soda Hall #1776
Computer Science Division
Department of Electrical Engineering and Computer Sciences
University of California
Berkeley, CA 94720-1776
zadeh@eecs.berkeley.edu
Tel.(office): (510) 642-4959
Fax (office): (510) 642-1712
Tel.(home): (510) 526-2569
Fax (home): (510) 526-2433
URL: http://www.cs.berkeley.edu/~zadeh/
BISC Homepage URLs
URL: http://zadeh.cs.berkeley.edu/
URL: http://www-bisc.cs.berkeley.edu/
