Traditional phase-controlled rectifying power supply is being replaced by the switching one, which is characterized by high precision, low voltage ripple and high efficiency.

电力系统中传统的相控整流型电源正在逐步被具有高精度、低纹波、高效率等特性的开关电源取代。

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Compared with the conventional design of ten-valued circuits, the design has the characteristics of high coding efficiency, low voltage supply, etc.

与以往十值电路的设计方法相比较，此设计方案具有编码效率高、供电电压低等特点。

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The paper discusses the problems regarding the low efficiency and unstable quality of the power supply in the electric network at universities.

分析了高校现有供电网络存在的效率低、能耗大和供电质量不稳定的问题。

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In an earlier report, the Royal Academy of Engineering had mapped out the scale of the task involved in moving to a low-carbon electricity supply - with a mix of energy efficiency, renewables, nuclear and clean coal.

BBC: Promise, but daunting challenges for electric cars