拍法

基于延时零拍法的DFB光纤激光器线宽测量

Measurement of the Linewidth of DFB Fibre Laser Based on the Delayed Self-homodyne

因而，可用差拍法测量宽带LFM信号的微小延时。2.对分数延时方法的研究。

As a result , frequency beat method can be used to measure the small delay of broadband LFM signal . 2 .

数字相控阵雷达各个阵元通道之间由于通道一致性会产生微小延时，本文用差拍法、插值相关法以及自适应法测量宽带LFM信号的延时并进行了仿真。

Minimal delay among channels of digital phased array radar is produced due to channel difference . Broadband LFM signal delay is measured by the methods of frequency beat , correlation and adaptive .

并重点介绍了线宽的测量方法，最终使用零拍法测得激光器的光谱线宽为20KHz，激光器可以连续输出工作稳定度的激光。

At the same time , the line width measurement methods are emphasized in this thesis . When we use homodyne method , the spectral line-width of ECSL is 20 KHz . Therefore , Lasers which have working stability can be continuously exported .

光拍法测量光速实验中的声光调制

Photoacoustic modulation in the measurement of light speed by photo-beat method

相关零拍法相位噪声谱测量系统的研究与实现

The Study of the CZB Measuring System for Phase-Noise Spectrum

光拍法测光速实验中的几个误解

Misunderstandings in the experiment measuring the speed of light with light beat

大牛，像你这么个拍法。

Daniel , if you pat the bisque like that .

提出了一种利用差拍法测量油水浓度的有效方法。

An efficient heterodyne frequency method to measure the concentration of oil and water mixture is proposed .

关于光拍法测光速实验中光电流表示式的探讨

Discussion on the Photocurrent Representation of Photodetector in the Experiment of Measuring the Velocity of Light with Light Beating

本文在对差拍法原理研究的基础上，提出了一套新的频率稳定度测量系统的组建方案，该系统主要由频率合成器、拍频测量模块和混频器模块三部分组成。

This paper proposes a new constructing plan of frequency stability testing system on the basis of the research on the principle of beat method .

分析两种不同网球底线击球技术的握拍法、步法和引拍挥拍的运动轨迹，比较它们的技术特点及其生物力学特征。

Analyze the racket grasp style , footwork , and the course of lead and brandish of the two baseline drives respectively , and compare the techniques and bio-mechanical characteristics between .

詹姆士：可是我喜欢用握手式握拍法。因为反手杀球比较容易。她的握拍方式与传统的直握法不同，而更像网球拍的握法。

James : But I prefer the shake-hands grip because I can smash the ball with a backhand stroke more easily . She used a tennis grip rather than the traditional " pen-holder " style .

这怪兽并非来自某个被毁的空间站或类似的科幻片场景，因为我觉得汉城人都熟悉汉江，这样的拍法对他们来说并不为过。

The concept of not having this monster come from a broken space station or some science fiction like that-I thought everyone in Seoul knows the Han River . It 's very normal for them .

采用拍频法测量CO2激光器频率稳定度。

The frequency stability of CW CO 2 laser was measured with beat frequency method .

无差拍SVPWM法中，重复预测观测器能正确地预测指令电流，并且单独验证了编制的SVPWM程序的正确性。

In deadbeat SVPWM control strategy , repetitive predictor can forecast instruction current correctly . Besides , the correctness of SVPWM program was validated separately .

用拍频法测量了自聚焦棒外腔激光器单纵模线宽与注入电流的关系曲线。并进行了调制速率100MHz正弦信号相干FSK调制一解调实验。

The stable beat patterns were obtained at several wavelength point The curve of the linewidth of graded index rod external cavity semiconductor laser vs the injection current was got by using beat method 100 MHz sinusoidal wave FSK modulation coherent transmission experiment was carried out .

一种测量频率稳定度的无间隙时间拍频法

A Beat Frequency Method of Zero Dead-Time for Frequency Stability Measurement

多模光纤用于激光线宽零拍测量法的原理和实验研究

Theoretical and experimental study on the self-homodyning linewidth measurement using multimode fiber

掸拍测定法快速诊断胎儿成熟度

The tap test for rapid diagnosis of fetal maturity

频率重复性和稳定性用拍频法进行了测量。

Frequency reproducibility and stability have been studied by a beat-frequency method measurement .

窄线宽激光的零拍测量法

Homodyne Method for Measuring Narrow Linewidth Lasers

用抗共模干扰的激光拍频法使激光器频率不稳定引起的拍频误差减小到Δνν＜2×10－20。

By means of the common mode restraint technique the error caused by the frequency instability of laser has been decreased to the level of 2 × 10 - 20 in Δ ν / ν .

针对传统零拍测量法在提高相位噪声谱测量灵敏度方面所面临的困难，实现了一种利用相关技术原理结合零拍法的测量新方法&相关零拍测量法。

Due to the difficulty that the traditional zero-beat method will be faced with in the aspect of improvement of measure sensitivity of the phase-noise spectrum , a new type measure method named correlation - zero-beat method ( CZB ) is put forward .

文中以传统的差拍测频法为平台，分别以模拟和数字两种形式实现此方案。

Both the analog and the digital scheme on the traditional difference frequency method are realized .

拍频干涉法可用于纳米、亚纳米级精度的位移测量，其测量不确定度主要取决于单位频差&位移当量的非线性。

A heterodyne interferometer may be used in the displacement measurement with an accuracy of nanometer or subnanometer order . The accuracy mainly depends on the nonlinearity of the ratio of displacement to frequency difference .

试着用双手反拍，同样握法，由下往上。

Try a two-handed backhand , same grip , and then low to high .

认为不解拍整机动平衡法具有原理正确、方法简单、实施起来方便等优点。

It is found that the method without decomposing beat has following merits : The principle is correct , the method is simple , use is conveniently .