Artificial Neural Network

Vajiheh Zoghiyan Dec. 2013

1

The structure of a neuron

2

X₀=1 W₀=b

Threshold

W₁

W₂

Wᵪ

X₁

X₂

Xᵪ

�᷊��᷊�

𝑋

𝑟=0

Output(y)

If ∑>T then output=1

Otherwise output=0

3

4

Activation function

transfer function:

• Hardlim

• hardlims

• Purelin

5

Activation function

• Satlin:

• Satlins:

6

• Logsig:

• Tansig:

• Command line solution

• Graphical user interface: nftool

• nntool

7

There are 3 simple ways to solve a neural network problem in Matlab