Jornal article

Kybernetika

2007

5 (2007)

697-712

0023-5954

Ing. Jiří Grim, CSc. (ÚTIA - Oddělení rozpoznávání obrazů)

probabilistic neural networks, distribution mixtures, sequen

We summarize the main results on probabilistic neural networks recently published in a series of papers. Considering the framework of statistical pattern recognition we assume approximation of class-conditional distributions by finite mixtures of product components. The probabilistic neurons correspond to mixture components and can be interpreted in neurophysiological terms. In this way we can find possible theoretical background of the functional properties of neurons. For example, the general formula for synaptical weights provides a statistical justification of the well known Hebbian principle of learning. Similarly, the mean effect of lateral inhibition can be expressed by means of a formula proposed by Perez as a measure of dependence tightness of involved variables.