The paper introduces the principle of the active power filter briefly, presents a new method for detecting and producing distortion current applied to the APF and provides experimental waveform.

简单介绍电力有源滤波器的工作原理，提出了检测与产生畸变电流的新方法及其电路，并给出了实验波形。

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The interface strategy is to have a "distortion portal" opened at the current mouse coordinates when the mouse button is down.

接口策略是当鼠标键按下时，在鼠标当前坐标打开“失真门户”。

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Then, each pass of the main loop checks for events, resets the draw state, draws the circular "portal" windows, then animates their distortion back to the current time frame.

随后，主循环在每次循环时都检查事件、重置绘图状态、绘出圆形的“门户”窗口，然后以动画形式将其失真返回当前时帧。

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The core economic distortion in the current health market is that consumers rarely have the incentive to seek the best value for their money.

WSJ: Review & Outlook: Paul Ryan and His Critics

But he warned that the government's introduction of a new league table measure - the English Baccalaureate - risked creating the kind of distortion that was being criticised in the current rankings.

BBC: Teenagers must stick at English and maths