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).
The ECG machine amplifies these impulses and records them on the ECG graph paper or on a monitor screen called an oscilloscope. (5) Positive impulses appear as upward deflections on the graph paper or monitor screen. (6) Negative impulses appear as downward deflection on the graph paper or monitor screen.