It was a valued export in Silk Road trading, but the manufacturing process was kept secret. During the Tang Dynasty (618-907) and the Song Dynasty (960-1279), varieties of paper were developed for different purposes.
April 7, 2015 Written by controlguru. Like the P-Only controller, the Proportional-Integral (PI) algorithm computes and transmits a controller output (CO) signal every sample time, T, to the final control element (e.g., valve, variable speed pump).
Right Hand Crossover Signal Controls. The Right Hand Crossover Signal Control is designed for drivers who have lost either their arm, or the use of it. The signal control allows a person to use a single knob to move the steering wheel and access both control signals on one side of their car.