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Neural network tutorial: The back-propagation algorithm (Part 1)

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Uploaded on Jan 7, 2012

In this video we will derive the back-propagation algorithm as is used for neural networks. I use the sigmoid transfer function because it is the most common, but the derivation is the same, and easily extensible.

Helpful diagram: http://db.tt/B5Nyo14D
This particular video goes from the derivative of the sigmoid itself to the delta for the output layer

The presentation can be found here: http://db.tt/yq6X4bQS

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