A second order filter is used to smooth the speed reference signal, and the perfect non-overshooting speed tracking is achieved.

采用二阶滤波环节平滑速度指令，实现了理想无超调的快速速度跟踪控制。

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In this paper, formulas are derived for the minimal order filter in a singular, linear time-invariant, continuous and stochastic system.

本文讨论了奇异线性定常连续随机系统最小阶滤波器的设计问题。

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Employing the fundamental principle of linear filter model, an improved simulation method is developed based on a high-order filter model for randomly undulatory sea surface.

根据线性滤波器模型的基本原理，提出了一种改进的基于高阶滤波器的随机起伏海面仿真方法。

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Others will provide telephone consultations first in order to filter those patients who need to be seen from those who don't.

BBC: Why GP surgeries need crowd control

Edwards also bought a company called Embrella, which makes a filter that can be placed in the aorta in order to catch material.

FORBES: New Heart Valves Prove We're Living In The Future