Derivative action (referred to by the letter d) measures and responds to the rate of change of process signal, and adjusts the output of the controller to minimise overshoot.
微分动作(字母d表示)测量并对过程信号变化率进行反应，调整控制器的输出以达到最小的突出峰。
Rectangular wave of arbitrary shape shall be output, change rate of AC plus-minus shall be regulated arbitrarily, and the speed of exchanges over zero shall be very quick.
要求此电源能输出任意形状的矩形波，交流正负极性比率可任意调节，交流过零速度极快。
Methods an equation for estimating cardiac output according as the change of ventricular rate was established by Doppler volume flowing method at mitral valve.
方法在二尖瓣水平以多普勒超声体积血流方法建立以心室率为变量的心输出量方程。
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