Adapting fuzzy sets automatically for weather prediction...?

Bjarne Hansen (
Sun, 19 Oct 1997 15:30:33 +0200 (MET DST)

How can fuzzy expert systems be made to optimize their fuzzy sets
automatically? Does someone have a suggestion or know of an instructive

The reason I ask is that I am developing an expert system to help in
weather prediction. The system uses fuzzy logic and case-based
reasoning. I intend to incorporate some form of neural network to
enable learning.

In developing a prototype system, I designed reasonable fuzzy sets based
on my knowledge of a particular airport’s climatology. The
"climatology" consists of a 36-year long hourly record of weather data
from the airport -- in compressed form, it is about 6 Megabytes of
data. The system works for airport for which it was designed, but the
system does not work so well when it is applied to other airports.
Supposedly, the system would become portable if the fuzzy sets could
adapt automatically to suit the climatology of other airports.

A description of the prototype system is posted at:

Thank you for your help,

Bjarne Hansen,
Computer Science Dept.
Dalhousie University, Nova Scotia