It also includes, Hall element inputs, a sequencer for commutation control, fixed off time pulse width modulation (PWM) current control and locked rotor protection.

它还包括霍尔元件输入、整流控制定序器、固定停机时间脉冲宽度调制(PWM)电流控制以及锁定转子保护。

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The four common ultrasonic methods for measuring Q value in the laboratory, rise time, pulse echo, spectral ration and waveform inversion techniques are reviewed.

回顾了实验室中超声波测量Q值的四种常用方法：上升时间法、回声法、频谱振比法和波形反演法。

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The design method of the high voltage and the fast response time pulse transformer used in the condition of low load impedance was introduced.

介绍了工作于低阻抗负载下的高压大电流快响应脉冲变压器的一种设计方法。

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What's particularly "astonishing" he says, is how precisely the baby responds - in coos and gestures - often exactly in time with the pulse and bar structure of her sounds.

BBC: The universal language of lullabies

Since the FDA gave the big thumbs up to a fully implantable artificial heart earlier this month, cardiac surgeon "Bud" Frazier and his team at the Texas Heart Institute aren't wasting any time in developing what they hope will be a fully-functioning, pulse-free artificial heart.

ENGADGET: HeartMate II: the pulse-free artificial heart

By the time paramedics rushed the 32-year-old to the hospital, doctors could not find a pulse.

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