The memory capacity of the PSD rule with different numbers of synapses.

<p>The neuron is trained to memorize all patterns correctly in a maximum number of 500 epochs. The reaching points of 500 epochs are regarded as failure of the learning. The cases of 500, 750 and 1000 synapses are denoted by blue, red and green parts, respectively. The marked lines denote average learning epochs and the shaded areas show the standard deviation. The dashed line at 100 epochs is used for evaluating the efficient load described in the main text. All the data are averaged over 100 runs.