2.3 Data mining methods
We will adopt the most common NN type, the multilayer perceptron, where neurons are grouped into layers and connected by feedforward links (Fig. 2). Supervised learning is achieved by an iterative adjustment of the network con- nection weights, called the training procedure, in order to minimize an error function. For regression tasks, this NN architecture is often based on one hidden layer of H hidden nodes with a logistic activation and one output node with a linear function