计算机控制系统的过程通道分为四类：模拟量输入通道、模拟量输出通道、数字量输入通道和数字量输出通道。 -Computer control system process channel into four classes: an analog input channel, analog output channel, the digital quantity input channel and digital output channel.

Lindenmayer systems algorithm

HOMOTOPY THEORY IN CONTROL SYSTEM4