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- ************************************************************************
- Example: art2_tetra.xxx ART2 tetrahedron network
- ************************************************************************
-
- Problem description:
- ====================
-
- The ART2 tetrahedron network shows the self-organized classification
- of real valued input pattern vectors by an ART2 network. The input
- patterns are noisy real valued coordinates of the verteces of a
- tetrahedron in 3D space. They should automatically be classified into
- four different clusters. There exist variations of the input patterns
- with different amount of noise added to the input patterns.
-
- See the SNNS user manual for a more detailed description of the ART2
- implementation in SNNS.
-
-
- Pattern-Files: art2_tetra.pat
- ============== art2_tetra_low.pat
- art2_tetra_med.pat
- art2_tetra_high.pat
-
- All art2_tetra pattern files contain 40 input patterns with 3 real
- values each, describing a noisy coordinate of a vertex of the
- tetrahedron. The files differ by the amount of noise added to the
- verteces as indicated by the suffix 'low' 'med'(ium) and 'high'.
-
-
- Network-Files: art2_tetra.net
- ==============
-
- This network file contains a trained ART2 network for the tetrahedron
- vertex classification task described above. The standard configuration file
- for this network is art2_tetra.cfg
-
- You may generate your own ART2 network with the BIGNET tool from the
- Info-Panel of SNNS. This automatically generates all units and the
- necessary connections.
-
- Because the unit types and link structure are highly specialized in
- ART2 we strongly urge you only to use this tool to generate ART2
- networks in SNNS.
-
-
- Config-Files: art2_tetra.cfg (one 2D display only)
- =============
-
- The drawing of the 3D display is relatively slow for this network, so
- you probably want to work with the 2D display once you know how the
- units are connected.
- The 3D display is a nice example for a moderately complicated 3D
- network layout.
-
-
- Result-Files: (none)
- =============
-
-
- Hints:
- ======
-
- Read the chapter about ART2 in the SNNS manual very carefully!
-
- Note that ART2 needs a special network initialization function
- (REMOTE panel: OPTIONS select init function: ART2_Weights).
- Note that there exist two different ART2 update functions:
- (REMOTE panel: OPTIONS select update function: ART2_Synchronous
- or ART2_Stable)
- Note that ART2 needs a special learning function:
- (REMOTE panel: OPTIONS select learning function: ART2)
- These should already be set when loading the example ART2 network.
-
- You may use the ART2 learning parameters as given in the figure
- 'Setting the ART2 learning parameters $\rho$, a, b, c, and $\theta$.
-
- There exists additional documentation in form of the diploma
- thesis of Kai-Uwe Herrmann (in German), available via anon. ftp
- from our public ftp server ftp.informatik.uni-stuttgart.de as file
- /pub/SNNS/NN-papers-german/herrmann_kaiuwe_DA.ps.Z
-
- ************************************************************************
-