Switching power supply or DC power to AC power through it will be a stable DC voltage source.

开关电源把直流电源或交流电源通过它可以获得一个稳定的直流电压源。

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By comparing the heating effect of an unknown AC signal to that from a known DC reference, metrologists can determine the RMS AC quantity (voltage or current) in terms of the DC quantity.

为了对比一个已知直流参考的未知交流信号热效应，计量人员可以确定在一段时间内直流的交流有效值(电压或电流)。

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By digital simulation, the Ac carried wave system and its equivalent Dc system are checked and the feasibility of Dc method equivalent to the Ac carrier wave system is verified.

通过数字仿真，比较了交流载波系统和其等效直流系统，验证了交流载波系统等效直流方法的可行性。

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Running appliances off DC power can cut energy consumption dramatically by reducing the number of AC-DC conversions.

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Just as AC beat DC, the audio cassette beat 8-track and VHS beat Betamax, Qwerty won the format war.

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Once completed it is expected to generate 6.4 MWh DC (equivalent to 5MW AC) and be capable of generating enough electricity to power about 700 average-sized homes.

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