paper available: Growing Grid ......

[Bernd Fritzke]

ftp://ftp.neuroinformatik.ruhr-uni-bochum.de/pub/outgoing/fritzke/papers/fritzke.growing_grid.ps.gz

The following paper is available by http and ftp: 
 
    GROWING GRID - A SELF-ORGANIZING NETWORK WITH CONSTANT NEIGHBORHOOD
                     RANGE AND ADAPTATION STRENGTH
  (to appear in Neural Processing Letters, Vol. 2, No. 5, pp. 1-5, 1995)

                               BERND FRITZKE
                       Institut f"ur Neuroinformatik
                     Ruhr-Universit"at Bochum, Germany

     We  present a novel self-organizing network which is generated by
     a growth process. The application range of the model is the  same
     as  for  Kohonen's feature map: generation of topology-preserving
     and dimensionality-reducing mappings, e.g., for  the  purpose  of
     data  visualization.  The network structure is a rectangular grid
     which, however, increases its size during  self-organization.  By
     inserting  complete  rows  or columns of units the grid may adapt
     its height/width ratio to the given  pattern  distribution.  Both
     the  neighborhood range used to co-adapt units in the vicinity of
     the winning unit and the adaptation strength are constant  during
     the growth phase.  This makes it possible to let the network grow
     until an application-specific performance criterion is  fulfilled
     or until a desired network size is reached. A final approximation
     phase with decaying adaptation strength fine-tunes the network.

--
Bernd Fritzke * Institut f"ur Neuroinformatik             Tel. +49-234 7007921
Ruhr-Universit"at Bochum * Germany                        FAX. +49-234 7094210
WWW: http://www.neuroinformatik.ruhr-uni-bochum.de/ini/PEOPLE/fritzke/top.html