A new control approach is presented with a "local strain compensation" and a low cutoff frequency inertial link feedback in place of the differential one.

提出了“局部激励应变补偿”和把通常的微分负反馈改为低截止频率的惯性环节正反馈的控制新方案。

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The output waves of traditional resonant DC-Link inverter have too much low frequency harmonic waves which affect the output performance, because it can only use DPM control.

由于传统谐振直流环节逆变器只能采用离散脉冲调制方式，输出波形中含有丰富的低次谐波，严重影响输出性能。

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For the design of low frequency circuit, the mutual link relations can be regard as lumped parameters, and the influence of line's mutual link and board layer's property can be neglected.

对于低频电路设计，互连关系视为集总参数，线迹互连和板层特性的影响可以不考虑。

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More specifically, researchers have been interested in the link, if any, between the extremely low frequency magnetic fields generated by these lines and childhood leukaemia.

ECONOMIST: Power lines and cancer