Filter first, ask questions immediately.
首先过滤，立即询问问题。
Aiming at the questions such as filter resonance, overload trip and so on, the filter device is reformed and perfected.
针对设备运行中出现的滤波谐振、过载跳闸等问题，对滤波装置进行了改造和完善。
Two key questions, selection of sampling period and phenomenon of frequency aberrance, must be considered when the continuous notch filter is discretized.
本文讨论了离散化时需重点考虑的两个问题：采样周期的选取和频率畸变。
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