Preface
Natural NN's
NN History
Artificial NN's
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Types of NN's
Programming NN's

We will now move away from the biological network, and begin working with the artificial neural network. A neural network also consist, as the biological, of a lot of neurons. One could regard the artificial neurons as a group of information-processing units that is tied together in one great network. To show the artificial neuron in the best way possible we have chosen to make a figure of one.

The activation-function takes v_k as input and gives the output y_k. There is a lot of different activation-functions, here is a list of the ones most used.

Linear	Threshold	Piecewise linear
Sigmoid	Tanh