查询词典 frequency

It usually appears at the RF, blade passage frequency and commutator brush frequency, and their higher harmonics.

它通常出现在射频，叶片通过频率和整流子刷频率，其高次谐波。

It is concluded by the comparison of the Power Spectrum Density Function estimated from design spectra that the spectral energies do not distribute uniformly within the frequency of engineering interest in Chinese codes. The remarkable spectral energies concentrate in the range of low and high frequency.

由各规范设计谱估计的功率谱密度函数的比较说明，我国某些抗震设计规范设计谱给出的设计地震动在工程感兴趣的频率范围内可能存在能量分布不均的问题，低频分量和高频分量与中等频率段相比相对显著。

There is provided an apparatus and method for compensating for a frequency offset in an orthogonal frequency division multiplexing system.

提供一种在正交频分复用系统中补偿频率偏移的装置和方法。

There is provided an apparatus and method for compensating for a frequency offset in an orthogonal frequency division multipleing OFDM system.

一种OFDM系统中估计频率偏移补偿设备和方法。

The coefficient of component variance for high-frequency increased (p＜0.05) and low-frequency decreased (p＜0.01) in hypertensive patients with SAS after one night CPAP treatment.

活动后正常对照组和单纯高血压组Lc明显增加(p＜0.01，p＜0.01)，而SAS合并高血压组Lc却下降(p＜0.05)。一夜CPAP治疗后，SAS合并高血压组休息状态时Hc增加(p＜0.05)，Lc明显下降(p＜0.01)。

Generally, the cross flow fan operating noise totally about 55 dB, but in the midnight when prominent frequency noise has become extremely annoying. This research attempted to different axial configurative tongue designed to improve penetrating single frequency noise of cross-flow fan.

一般而言，横流扇的运转噪音约55dB左右并不算大，但是在夜深人静时某些特别突出的单频噪音却显得极度恼人，因此本研究尝试以不同之轴向舌端构形设计来改善横流扇之尖锐单频噪音；并将录制之声音以音质参数分析，找出较佳的舌端与叶轮扭转角度搭配。

If the time constant of integration circuit is properly set to improve high frequency restrain ratio to get accurate differential frequency signal.

在很多应用到频率差进行控制、处理的场合，若根据频率差计的原理，将其直接设计到一体化电路中

The cubic interpolation polynomial is got firstly in the given sub-range of the hydrophone's sensitivity-frequency curve by using the Akima curve smoothed algorithm, and the maximum of the polynomial is calculated in the sub-range by using the one dimension extreme value continued fraction algorithm, finally the frequency of the hydrophone is got.

频率测试是在灵敏度详细测试的基础上，采用阿克玛曲线光滑算法求出检波器幅频特性曲线在给定子区间上的三次插值多项式，再利用一维极值连分式法求出该区间上多项式的极值，从而求出检波器的频率值。

In this paper, the frequency spectrum and the bandwidth of the frequency shift signal with continuous and discontinuous phase are analyzed.

分析了相位连续与不连续移频信号的频谱并比较了它们的带宽。

For detecting the vibration frequency the dynamic systems, and using topology contravariant functor the unknown space was mapped to known space,the vibration frequency of unknown space will be investigated by the contravariant functor.

为了分析动力系统振动频率的瞬变性，采用拓扑反变的理论把未知的动力系统空间映射到已知的空间中，通过拓扑反变算子研究未知的空间频率的瞬变性。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"