A New Approach to Self-Organizing Polynomial Neural Networks by Means of Genetic Algorithms

摘要

In this paper, we introduce a new architecture of Genetic Algorithms (GA)-based Self-Organizing Polynomial Neural Networks (SOPNN) and discuss a comprehensive design methodology. The proposed GA-based SOPNN gives rise to a structurally optimized structure and comes with a substantial level of flexibility in comparison to the one we encounter in conventional PNNs. The design procedure applied in the construction of each layer of a PNN deals with its structural optimization involving the selection of preferred nodes (or PNs) with specific local characteristics (such as the number of input variables, the order of the polynomial, and a collection of the specific subset of input variables) and addresses specific aspects of parametric optimization. An aggregate performance index with a weighting factor is proposed in order to achieve a sound balance between approximation and generalization (predictive) abilities of the network.