Motor horsepower, voltage, phase and frequency.

电机马力(功率)，电压，相位和频率。

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An algorithm suitable for carrier phase and frequency offset estimation in software radio is proposed.

提出一种适合软件无线电的载波相位和频差估计算法。

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A phase detector is a device that takes two signals. If both have the same phase and frequency the output is zero.

鉴相器是一个有两个输入信号的器件，如果二者具有相同的相位和频率则输出为零。

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Phasor measurements track the amount of stress placed on the electric power grid by providing granular data about frequency, voltage and phase angle conditions in real-time.

FORBES: Can GridEye Save America's Power Grid?

Although they have not been found to cause any harm, the cables on conventional pylons, which transmit a three-phase alternating current, generate a strong electric field and a continuous buzz of low-frequency radio waves.

ECONOMIST: Monitor