详细讨论了下限频率和耦合电容的计算方法。
The methods for calculating low limit frequency and coupling capacitance are discussed in detail.
当我们立了感觉障碍的发言后，我发现它吸收了高频率和变暗活力充沛的高音音色。(觉得没有影响中和下限范围)。
As soon as we erected the felt barrier between the speakers, I discovered that it absorbed high frequencies and dimmed the vibrancy of treble sounds. (the felt had no effect on mid and lower range).
再次，设计了用于脉冲接收的TEM喇叭天线，由于要求的下限频率较低，所以重点对TEM喇叭天线进行了小型化的设计；
Thirdly, the TEM horn antenna which is used to receive pulse signal is designed in this part. For the low limited frequency, the TEM horn antenna is mainly designed to make it miniature.
只要信噪比不甚低，频点自跟踪频率估计是无偏的且估计方差接近理论下限。
FATAFE realizes unbiased estimation and its estimated variance approaches to theoretical lower bound if only signal-to-noise ratio is not very low.
本文分析了自适应频率估计器的性能及频偏的影响，得出了自适应频率估计方差下限的公式及达到此下限的条件。
In this paper properties of AFE and influences of frequency bias are analyzed, and formula on estimated variance lower bound is derived, and condition which is required by the bound is got.
临界频率是阻尼的函数，选择合适的阻尼可使临界频率尽量小，但存在下限。
The critical frequency is the function of damping and can be made as small as possible through selecting suitable damping. However the critical frequency has a lower limit.
应用电子技术按设定频率上、下限实现自动转换的双通道积分电路，并按此设计PLC控制的变频调速高楼供水系统。
Variable frequency altering-speed system of supplying water for high building using PLC control was designed by double-channel integral circuit.
应用电子技术按设定频率上、下限实现自动转换的双通道积分电路，并按此设计PLC控制的变频调速高楼供水系统。
Variable frequency altering-speed system of supplying water for high building using PLC control was designed by double-channel integral circuit.
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