Competitive learning
Unsupervised learning
The basic idea
What's it good for?
Features of Competitive learning
Two or more layers
Competition between output nodes
Inhibition between nodes
Two phases
Weight normalisation
Geometric interpretation
Geometric interpretation II
Stable / unstable
Statistical equivalents
Importance of competitive learning
Competitive learning in the brain
Part II
Map formation in the brain
Somatosensory maps
Somatosensory maps II
Speculations
Kohonen maps
Kohonen algorithm
Finding the activity bubble
Finding activity bubble II
Updating the weights
Simplest implementation
Results of Kohonen
Influence of neighbourhood radius
Results II: the phonological typewriter
Phonological typewriter II
Kohonen conclusions
Summary
Email: meeter@psy.uva.nl
Home Page: www.neuromod.org/connectionism2001
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University of Amsterdam
