By counting the number of such X-rays while scanning the frequency of the laser pulse, the team could make a very precise measurement of the photon energy required to drive the 2s-2p transition.
通过统计所发出X光的数量，然后对照激光脉冲的频率，测量小组能得出一个非常精确的测量值，从2s能级到2p能级跃迁所需的量子能量。
The selection of measurement bandwidth in time domain frequency stability is discussed.
讨论了频率稳定度时域测量带宽如何选择的问题。
In the field of electronic technology, the frequency is basic parameter, frequency of Detection and many of the measurement of electrical parameters have a very close relationship.
在电子技术领域内，频率是一个最基本的参数，频率的检测与许多电气参数的测量都有着十分密切的关系。
The design of target doppler frequency measurement circuit is very important in phase coded MMW radar system because of the high measurement precision requirement of target speed.
在某相位编码毫米波雷达系统中，要求很高的目标速度测量精度，因而目标多普勒频率测量电路的设计比较重要。
The only way your LT measurement will increase with this method is with age or frequency of exercise.
使用该方法，您的乳酸门槛测量值仅能随着年龄和运动频次的提高而提高。
This article introduces the method of extending noise figure meter HP 8970a measurement frequency range.
本文介绍了扩展噪声系数表hp 8970a测量频率范围的方法。
The measurement error of differential absorption laser radar caused by the shift of its center frequency in measuring atmosphenc density has been discussed particularly.
详细地讨论了微分吸收激光雷达测量气体密度时中心频率的漂移所引起的测量误差。
The problems about the selection of excitation signal, limits of measurement frequency and noise influence have been discussed.
最后还讨论了时域法测量电极阻抗的激励信号的选择、测量频率上、下极限和噪声影响等问题。
The design of target Doppler frequency measurement circuit is very important in phase-coded MMW radar system because of the high measurement precision requirement of target speed.
在某相位编码毫米波雷达系统中，由于对目标速度测量精度的要求很高，因此目标多普勒频率测量电路的设计也具有比较重要的地位。
And it gives the suitable limits of measurement precision respectively, when the sampling frequency of data is 10 times. 8 times and 6 times of the frequency of physical change.
给出了数据采样频率是物理量变化频率10倍、8倍和6倍以上时测量精度的适用范围。
The basic principle of the linear frequency modulation absolute distance interferometric plan and the problems existed in beating frequency measurement are described.
论述了线性调频绝对距离干涉测量方案的基本原理以及拍频测量中存在的问题；
The current measurement and control system in a Low-frequency Magnetic Field is a comprehensive system of hardware and software, including two parts: current measurement and computer control.
低频电磁场电流测控系统包括电流测试和输出控制两个部分，由软件和硬件相互配合组成一个完整的计算机控制系统。
In this paper, the design of the frequency measurement and correcting system can be achieved with less cost, and it also offered the system performance test.
通过对该方法灵活运用，本文用较少的代价完成了频率测量及校正系统的设计，并对该系统进行了性能测试。
This paper proposed the theory of digital counting instantaneous frequency measurement and analyzed the error of frequency measurement.
文章介绍了一种用直接数字计数测量瞬时频率的原理，并进行了测频误差分析。
This paper introduces the design of the changeable gate frequency measurement.
介绍了变闸门频率测量仪的设计方法。
Design of computer controlled wide range frequency response measurement system is introduced.
介绍了计算机控制的宽带频率特性测试系统的设计。
The spectrum division technique was used for establishing signal model of delay time measurement, and amplitude frequency characteristics of the signal after spectrum division was investigated.
利用频谱相除技术构建了延迟时间测量的信号模型，研究了频谱相除后信号的幅频特性。
Side-mode suppression ratios and dynamic behavior of wavelength transients, which probably affect the measurement of frequency response, are also investigated.
文中也研究了系统中可能会影响频响特性测量的其他因素，如光源的边模抑制比、波长调谐速度等。
This new method reduces the influence of time response of Fourier filtering on frequency measurement and improves the accuracy of transient frequency measurement.
新的算法有效地补偿了富氏滤波的时间响应对频率测量造成的影响，提高了算法的暂态测频精度。其程序和计算非常简单。
The switching solution should have as a minimum the bandwidth of the DUT, and preferably equal to the bandwidth of any higher frequency source and measurement equipment.
切换方案的最小带宽应该为DUT的带宽，最好是等于任何高频源和测量设备的带宽。
If the input signal is anywhere in the frequency range of the detector, the meter will make a valid power measurement.
只要输入信号落在检测器的频率范围内，则功率计就能给出准确的的功率。
The frequency measurement is of practical value in electric industry.
频率测量在电力工业中极具实用价值。
Modified Hadamard Variance (MHV) has been widely used for the power spectrum measurement of frequency sources.
用修正哈达玛方差(MHV)来测量频率源的谱密度已在国内外广泛流行。
The Maximum permissible error when the working frequency of Resistor is equal to or lower than the measurement frequency.
电阻箱的工作频率等于或低于测试频率上限时的最大允许误差。
Proposed a novel scheme to measure the Brillouin frequency shift and power change, and analyzed the measurement accuracy of Brillouin frequency shift.
提出了一种同时测量布里渊频移和功率变化的新方案，同时对系统的布里渊频移测量精度进行了分析。
The mounting resonant frequency of vibration measurement system formed with piezoelectric acceleration sensor YD-1 and mounted magnetic base CZ-4 is addressed.
介绍了YD - 1型压电式加速度传感器与CZ - 4型磁座构成的磁座安装测振系统的安装谐振频率。
This paper introduces a system of frequency measurement and control system based on single-chip microcomputer control.
本文在对单片机小系统进行研究的基础上，介绍了一种由单片机控制的频率测量控制系统。
A novel method of calibration and measurement of swept frequency dual six-port network analyzer is given by authors in this paper.
本文介绍了作者研究的一种新颖的扫频双六端口网络分析仪校准与测量技术。
The measurement of ultrahigh frequency is one of the difficulties in frequency measurement.
特高频率的测量是频率测量中的难点之一。
By the method of frequency measurement, instant rotational speed is measured in the test system, angular acceleration is calculated by using the feature of the MCU with the least square method.
介绍了一种发动机无外载功率检测系统的软、硬件设计，利用测频法测量出某一时刻的瞬时速度，并利用最小二乘法求出角加速度。
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