
148 ◾ Biological Computation
emulating natural learning systems, they are particularly well suited to
such tasks. is chapter deals with such articial neural networks and
their usage as learning systems.
4.3 ARTIFICIAL NEURAL NETWORKS
4.3.1 General Structure of Artificial Neural Networks
e atomic unit of the simplest articial neural network is an idealized
neuron called the McCulloch–Pitts neuron, shown in Figure 4.2. e
neuron can be in one of two states: (1) the ring state (denoted by the
value 1); and (2) the nonring state (denoted by the value 0). e state
of the neuron changes according to signals it receives from the neurons ...