Question

2. The following truth table defines the logical NAND operation: In1 In2 In1 NAND inz 0 Draw a two-layer ANN that implements logical NAND. You should work out two versions The first version uses two input nodes, and sets the threshold to an appropriate value in the output neuron. The second version uses the bias node as an additional input node, and sets the threshold to zero. For both versions, prove your results

Answer 1

TWO LAYER ARTIFICIAL NEURAL NETWORK

First LayerS | Second Layer Inlwl I In2

Output is sum = (ln1* w1) + (In2 * w2) + bias

The output should be greater than 0 , sum > 0

In1	In2	w1	w2	Bias	Sum	NAND gate Output
0	0	-0.5	0.1	1	1	1
0	1	-0.5	0.1	1	0.5	1
1	0	-0.5	0.1	1	0.5	1
1	1	-0.5	0.1	1	0	0

Error can be find out by using the formula - current output - Expected output

current output can be done by using the sum and expected output is the NAND gate output.