Tues. 3/14: ALAN LAPEDES, Neural Nets and Signal Processing

[Mark Gluck]

            Stanford University Interdisciplinary Colloquium Series:
                   Adaptive Networks and their Applications

                        Mar.  14th (Tuesday, 3:30pm):

********************************************************************************

            "Nonlinear Signal Processing with Adaptive Networks"

                             ALAN LAPEDES
                        Theoretical Division
                        Los Alamos National Laboratory, MS B213
                        Los Alamos, New Mexico 87545
********************************************************************************
     
                               Abstract

  Previous work on using the new generation of nonlinear neural networks
for signal processing tasks is reviewed. The concept of a nonlinear
system changing its behavior as a parameter is changed (bifurcations)
is introduced and investigated for the simple logistic map. In this
situation we show that instabilities (limit cycles, chaos) of this
system may be predicted as a function of a system parameter purely
from observations of the system in its stable regime where it evolves
to a stable fixedpoint. We consider predicting the bifurcation of a  
hydrodynamic experiment. Both backpropagation nets and radial basis networks
are used on this problem. Agreement with experiment is good, and plenty
of pretty three dimensional pictures will be shown. Unnecessary formalism
will be kept to a bare minimum.

                          Additional Information
                          ----------------------

Location: Room 380-380X, which can be reached through the lower level
 between the Psychology and Mathematical Sciences buildings. 
Level: Technically oriented for persons working in related areas.
Mailing lists: To be added to the network mailing list, netmail to
 netlist at psych.stanford.edu with "addme" as your subject header.
 For additional information, contact Mark Gluck (gluck at psych.stanford.edu).