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L005.neural networks

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Artificial Neural Networks Torsten Reil [email_address]
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What are Neural Networks? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Biological Neural Nets ,[object Object],[object Object],[object Object],[object Object],[object Object]
 
 
 
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ANNs – The basics ,[object Object],[object Object],[object Object]
[object Object]
[object Object],[object Object]
[object Object]
Feed-forward nets ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Internal representation (interpretation) of data
[object Object],[object Object],Squashing:
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example: Voice Recognition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],Steve David
[object Object],Steve David 0.43 0.26 0.73 0.55
[object Object],Steve David 0.43 – 0 = 0.43 0.26 –1 = 0.74 0.73 – 1 = 0.27 0.55 – 0 = 0.55
[object Object],Steve David 0.43 – 0 = 0.43 0.26 – 1 = 0.74 0.73 – 1 = 0.27 0.55 – 0 = 0.55 1.17 0.82
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],Steve David 0.01 0.99 0.99 0.01
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cluster analysis of hidden layer
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Recurrent Networks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Elman Nets ,[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object]
Hopfield Networks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],DEMO
[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object]
 
[object Object]
Recap – Neural Networks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Online material: http://users.ox.ac.uk/~quee0818

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