Machine Learning in Java - Second Edition

Feedforward neural networks

A feedforward neural network is an ANN that consists of several perceptrons, which are organized into layers, as shown in the following diagram: input layer, output layer, and one or more hidden layers. The hidden layers have nothing to do with the outside world, hence the name. Each layer perceptron, also known as a neuron, has direct connections to the perceptrons in the next layer, whereas connections between two neurons carry a weight thats similar to the perceptron weights. So, all the perceptrons in one layer are connected with the perceptrons in the next layer, and the information is fed forward to the next layer. This diagram shows a network with a four-unit Input layer, corresponding to the size of the  ...