The electrical impedance, AC conductivity and dielectric properties of phenol red compound investigated and modeled by an artificial neural network
H A M Ali,D M Habashy
Figure 2. A simple neuron model: each input Xi is weighted by a factor Wi. The total of all inputs is calculated ${\sum }_{\mathrm{all\; inputs}}{W}_{i}{X}_{i},$ then an activation function f is applied to the product a. The neural result is taken to be f (a); and f (a) = activation function (${\sum }_{\mathrm{all\; inputs}}{W}_{i}{X}_{i}$).