The two classes of planar curve generation are DDA(digitaldifferential analyzer)and DCM ( displacement comparison method).
平面曲线的生成算法主要有DDA（数学微分分析器）和DCM（位移比较法）。
2
Introduce function, Character of 7ut512 digitaldifferential relay and applying it to differential protect on motor generator.
介绍了7ut5 12型数字式差动保护继电器的功能、特点及在电动机差动保护中的应用。
3
Based on character of signal in TWACS and harmonic in power system, the digitaldifferential technique can detect the TWACS signal and eliminate the integer harmonics effectively.