Fully connected neural network and sigmoid The set of calculations for setting the output to either 0 or 1 shown in the perceptron diagram above is called the neuron’s activation function.

In Lindsay’s neural network, her team gave their model thousands of images ... whereas other times, the equation includes a sigmoid function applied to the entire sum so that the resulting number lies ...

By replacing the step function with a continuous function, the neural network outputs a real number. Often a 'sigmoid' function—a soft version of the threshold function—is used (Fig.