Based on the spectrum analysis except for some spurious sources because of phase truncation and amplitude truncation in theoretical analysis spurs come from the DDS and the beat frequency of the output signal its harmonics and clock leakage .

通过对DDS实际频谱曲线的分析，发现产生了在理论分析中相位截断误差及幅度量化误差产生的杂散之外的其它杂散来源，特别是时钟泄露与输出信号及它的谐波的 差 拍产生的 杂散。

Some corrections and improvements to the beat frequency model for the quasi-periodic oscillation phenomenon in X-rays binaries have been made in this paper .

本文对小质量X射线双星的准周期振荡的 差 频模型做了修正和补充。

The beat frequency signal - to-noise ratios are better than 20 dB .

三次实验中 差 频信号的信噪比均优于20dB。

Theoretical Study of Fifth-Order Polarization Beat Frequency in a V Type Three-Level System

V型三能级系统中五阶极化 拍 频的理论研究

Finally the B-FOG beat frequency stability factor is analysed .

最后，分析了影响 B-FOG 拍 频稳定的因素。

In the fiber laser sensor system the beat frequency demodulation method is a very simple and full-electronic optical signal demodulation technique .

在光纤激光传感系统中， 拍 频解调方法相比其它传统的解调方法来说，是一种相当简单、全电子的光信号解调技术。

The envelope of the beat frequency will always be stationary in space ; no angular velocity .

信封的 摆动 频率将永远固定在空间；没有角速度。

Its beat frequency sound field has a strong directivity so be called the Audio Spotlight .

参量阵 扬声器是一种新型的声场定向设备，所发射的 差 频声场具有强指向性而被称为音频聚光灯。

The influence of time length and beat frequency on radar range is discussed .

讨论了信号时长和 差 拍 频率对雷达作用距离的影响；

The infrasonic vibration generator is established on the principle or beat frequency . Starting from this principle we study the frequencies of two pairs of special forks and find that there exists an infrasonic frequency function between the forks .

次声振荡发生器建立于 拍 频原理的基础上，按此原理我们研究两对特制音叉的频率，并找出了在这两对音叉间所存在的次声频率函数。

Location optimization of the A and B points ; Choice of central beat frequency is studied .

选择水平段A、B点位置；确定了中心 拍 频的最佳选择；

A Measurement Method for a CW Laser Modulation Spectrum Based on Optical Beat Frequency

一种基于光 拍 频的连续激光调制光谱测量方法

Specially for the transmission line with shunt reactor the paper analyzes the components of power frequency and low frequency of recovery voltage and researches its beat frequency phenomenon in theory and EMTP simulation .

对有并联电抗器补偿的超高压线路，分析了恢复电压中的工频分量以及由各储能元件形成的低频振荡分量，并对恢复电压的 拍 频现象进行了深入的研究。

Choice of central beat frequency is studied .

确定了中心 拍 频的最佳选择；

The beat frequency was determined by fitting with certain model .

我们选择恰当的数学模型进行拟合分析，得到了 拍 频 频率。

Theoretical analysis showed that the laser frequency stability and the beat frequency stability is in the same .

理论分析表明激光频率稳定度与 拍 频 频率的稳定度相同。

Stability Analysis of Beat Frequency in Double-Longitudinal-Mode He-Ne Laser

双纵模He-Ne激光器的 拍 频稳定度分析

The experimental results were satisfactory the beat frequency stability was 1.27 × 10 - 7 ( Allen variance ) .

实验 频率 锁定结果良好， 频率稳定度为127× 10-7（阿仑方差）。

The correlative theories including laser beat frequency principle and laser stabilized frequency technology are represented .

对光学加速度计相关理论，包括激光 拍 频 检测原理、激光稳频技术等有较为详细的叙述。

Effect of ATP on Human Nasal Ciliary Beat Frequency

ATP对人鼻腔纤毛 摆动 频率的影响

The analysis shows that when the range of laser frequency modulation is determined a relative measuring accuracy of 10 - 5 can be achieved through measurement of phase difference of beat frequency signals between starting point and terminal point .

分析表明，在激光器调频范围确定的情况下，可以通过测量起点与终点 拍 频信号相位差的方法，实现10-5的相对测量精度；

This paper studies power tuning curve and beat frequency tuning curve of 6328A transverse Zeeman laser adopted mutually orthogonal magnetic fields .

本文研究了采用正交磁场的波长为6328A的横向塞曼激光器的功率调谐曲线和 拍 频调谐曲线。

While tail beat frequency ( TBF ) of GIFT strain Nile tilapia increased with increasing water current while When water velocity was up to0 .

在一定流速范围内，罗非鱼幼鱼 摆尾 频率随着流速增加而增大。

Study on ciliary beat frequency of the mucosa of bulla and upper respiratory tract in mice

小鼠中耳及呼吸道 纤毛运动 频率研究

Generation of millimeter wave by beat frequency of photonic crystal waveguide directional couplers

利用光子晶体波导定向耦合 差 频产生毫米波

Beat frequency result of piezoelectric deformable mirror without modulation is given and its self oscillation frequency with phase modulation is also given .

给出了压电变形反射镜没有调制时的 拍 频结果。同时，还给出了该反射镜进行相位调制的自振频率。

A novel method for active fiber refractive index measurement based on beat frequency interrogation of the multi-longitudinal-mode distributed Bragg reflector ( DBR ) fiber laser was presented .

介绍了一种基于多纵模分布布拉格反射（DBR）光纤激光器 拍 频解调的有源光纤折射率测量方法。

Then the pulse width parameter which is the most important in the parameters of FMICW is analyzed . The stricter restrict is given to ensure the range spectrum has only one beat frequency after signal processing .

然后对 FMICW波形参数中最为重要的脉冲宽度进行了分析，给出了更为严格的约束条件，保证了信号处理后距离谱 峰值的唯一性。