Network structure determination is an important issue in pattern classifica
tion based on a probabilistic neural network. In this study, a supervised n
etwork structure determination algorithm is proposed. The proposed algorith
m consists of two parts and runs in an iterative way. The first part identi
fies an appropriate smoothing parameter using a genetic algorithm, while th
e second part determines suitable pattern layer neurons using a forward reg
ression orthogonal algorithm. The proposed algorithm is capable of offering
a fairly small network structure with satisfactory classification accuracy
.