Neural networks – the foundation

The inspiration for neural networks or multilayer perceptrons is the human brain and nervous system. At the heart of our nervous system is the neuron pictured above the computer analog, which is a perceptron:

Example of human neuron beside a perceptron

The neurons in our brain collect input, do something, and then spit out a response much like the computer analog, the perceptron. A perceptron takes a set of inputs, sums them all up, and passes them through an activation function. That activation function determines whether to send output, and at what level to send it when activated. Let's take a closer look ...

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