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A novel self-organizing map (SOM) neural network for discrete groups of data clustering. Presenter : Fen-Rou Ciou Authors : M.H. Ghaseminezhad , A. Karami 2011,ASC. Outlines. Motivation Objectives Methodology Experiments Conclusions Comments. Motivation. - PowerPoint PPT Presentation
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Intelligent Database Systems Lab
Presenter : Fen-Rou Ciou
Authors : M.H. Ghaseminezhad, A. Karami
2011,ASC
A novel self-organizing map (SOM) neural network for discrete groups of data
clustering
Intelligent Database Systems Lab
OutlinesMotivationObjectivesMethodologyExperimentsConclusionsComments
Intelligent Database Systems Lab
Motivation• However, no algorithm that can automatically
cluster discrete groups of data is presented, and
our simulation results show that the classic SOM
algorithm cannot cluster discrete data correctly.
Intelligent Database Systems Lab
Objectives• In this paper present a novel SOM-based algorithm
that can automatically cluster discrete groups of data
using an unsupervised method.
Intelligent Database Systems Lab
Methodology
Intelligent Database Systems Lab
Methodology – First PhaseInitialize
Find the value
Choose an input vector X
Calculate the distance
Update weights
Set t = t+1Until t = T
Initialize all weights wij
Set Learning iteration number t=0, topological neighborhood d0 , Learning rate ᾳ0 , Total iterations T , Total number of neurons M
t < T
Intelligent Database Systems Lab
Methodology – Second PhaseInitialize
Calculate “batch”
parameter
Find the value
Choose an input vector X
Calculate the distance
Increase the age
Update weights
If b < Batch
Update weights
Set t = t+1Until t = T
Initialize all weights wij
Set Learning iteration number t=0, topological neighborhood d0 , Learning rate ᾳ0 , Total iterations T , Total number of neurons MBatch0 ,
Intelligent Database Systems Lab
Methodology – Third PhaseInitial M and set i
= 1Choose
Union also set i
= i + 1If i < M
Intelligent Database Systems Lab
Methodology
Intelligent Database Systems Lab
Experiments
Intelligent Database Systems Lab
Experiments
Intelligent Database Systems Lab
Conclusions• The novel SOM algorithm does a substantially better
job of clustering discontinues data as a result of its
flexible structure as well as employing the batch
learning method.
Intelligent Database Systems Lab
Comments• Advantages
• Applications– SOM