6.7 baCkpropagatioN Neural Network (bpNN) model 239
rate of the network. The benefit of network pruning is reduction of training
time and recall time. A small number of units and links left in the network
after the pruning process enables us to extract more concise and comprehen-
sible rules than the ones generated from the unpruned networks.
6.7 BACKPROPAGATION NEURAL NETWORK (BPNN) MODEL
The backpropagation training algorithm is an iterative gradient algorithm
designed to minimize the mean-square error between the actual output of a
multilayer feed-forward perceptron and the desired output [Lippmann 1987].
Since a BPNN learns classification rules by going through many passes over
the training data vector, the learning time of a neural ...