Following diagram shows a simple artificial neural network (ANN) with one hidden layer: A weight connecting nodes (neurons) i and jis denoted by wij, such as W13 is the weight that connects neurons 1 and 3. Here we list all the weights in this ANN: W13=2 135=-2 w23=-1 W45 1 W14-3 W36 3 w24-2 W46-1 Both hidden layer and output layer apply the following step function as activation functions: 1 (v) = {0 if v0 0 otherwise.