Artificial Neural Networks: An Overview

摘要

Neural networks have been a much publicized topic of research in recent years and are now beginning to be used in a wide range of subject areas. One of the strands of interest in neural networks is to explore possible models of biological computation. Human brains contain about 1.5 × 10~(11) neurons of various types, with each receiving signals through 10 to 10~4 synapses. The response of a neuron happens in about 1 to 10 msec. Yet, one can recognize an old friend's face and call him in about 0.1 sec. This is a complex pattern recognition task that must be performed in a highly parallel way, because the recognition occurs in about 100 to 1000 steps.