A model of vortex signal in the state of pulsing flow is studied, and a new frequency measuring technique is proposed.
研究脉动流条件下涡街信号的模型，提出频率测量的新方法。
It introduces a digital cymometer which has the functions of frequency measuring, pulse cycle measuring, pulse width measuring and pulse signal ratio measuring.
介绍了具有频率测量、脉冲周期测量、脉冲宽度测量以及脉冲信号占空比测量等功能的数字频率计。
The filter processes input discrete sampling signal to recover continuous signal and suppress harmonic noise, and the zero-crossing frequency measuring method is improved.
该滤波器通过处理输入离散采样信号获得连续信号并抑制谐波噪声，改进了过零测频方法。
The recursive Fourier algorithm is used in frequency measuring to dynamically track the frequency change and real-timely adjust the sampling rate for fixed sampling points.
采用递推傅氏算法测频，动态跟踪频率变化，实时调整采样率进行定点采样；
A frequency measuring system which is designed in accordance with the working principle of a vibrating-wire sensor is mainly composed with a portable frequency measuring device and a PC.
根据振弦式传感器工作原理而设计的测频系统主要由手持式测频仪和PC计算机组成。
The size of the planet and its orbit can be worked out by measuring the frequency and size of these 'blinks'.
星球的大小和它的轨道是可以通过测量它的频率和闪现的大小算出来的。
An optical "frequency comb" is a very precise tool for measuring different colors-or frequencies-of light.
光学“频率梳”是一种精确测量光的颜色或频率的工具。
This effect can be measured in either the time domain by observing the rate of decay of voltage or in the frequency domain by measuring phase shifts between sinusoidal currents and voltages.
这个效应可以在时间域通过观测电压的衰变率来测量，也可以在频率域通过正弦电流和电压之间的相变来测量。
The computation methods of electromagnetism parameters, electromagnetic wave frequency and medium slice thickness in microwave measuring for composite material were analyzed.
分析了复合材料微波检测中电磁参量、电磁波频率和介质薄片厚度的计算方法。
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 type of inspection, frequency, type of documentation and measuring equipment must be defined for each inspection characteristic.
每个检测项目的检测种类、频率、记录方式、测量设备都必须明确规定。
With its narrow operating frequency scope and low measuring precision, traditional phase difference measuring system can 't satisfy the requirement of modern phase array technology.
传统的相位差测量系统，因其工作的频段窄，测量精度低，已不能满足现代相控阵技术的要求。
A method for measuring the dynamic frequency characteristics of a system with 8031 single chip microcomputer was presented, the circuit diagram was given and the software designing was introduced.
提出了用8031单片机及相应接口电路来完成系统动态频率特性测试的方法，给出了硬件的电路原理图，介绍了软件设计。
A novel measuring algorithms of frequency characteristic by using curve fitting techniques was presented.
提出一种新型的基于曲线拟合技术的频率特性测量算法。
This paper analyzes the influence of incidence and oscillation frequency of ultrasonic sensor on measuring accuracy. The option principle of ultrasonic sensor is presented.
以时差法为例，分析了超声波探头中超声射线入射角及振荡频率对测量精度的影响，给出了探头的选择原则。
A method for direct measuring the frequency of a free electron laser using AC Josephson effect is presented.
提出一种利用交流约瑟夫森效应直接测量自由电子激光频率的方法。
Measurement for rotative velocity of full-closed compressor by the method of measuring vibration frequency is discussed.
讨论了用测量振动频率的方法对全封闭式压缩机进行转速的测量。
The structure, working principle, measuring circuit and frequency characteristics of contact potential difference nondestructive testing equipment using fixed probe am intro - duced.
介绍了接触电位差法固定探头式无损探伤装置的结构，工作原理，测量电路及其频率特性。
This article introduces the method of humidity control used with Philips humidity-sensitive capacitance sensor, and the basic principle, measuring circle, work frequency, response time etc.
本文介绍了飞利浦湿敏电容传感器进行湿度控制的方法，包括它的基本原理、测量电路、工作频率、响应时间和滞后现象。
A sinusoidal fluid pressure generator for measuring the frequency response of pressure transducer system is presented.
本文描述了一种测量压力传感器系统频响用的正弦液压发生装置。
The error of measuring Brillouin frequency shift based on brim detecting technology has great influence on the measurement precision of sea surface temperature.
采用边缘探测技术测量布里渊频移量的误差会对海表温度测量精度带来很大影响。
This paper particularly analyze the relation between frequency of measured signal and frequency of count pulse on measuring precision.
文中详细地分析了被测信号的频率和计数脉冲的频率与测量精度之间的关系。
Reverse-spread spectrum device, time sequence inspection device, channel evaluation device and method for measuring frequency faults.
逆扩频装置，时序检测装置，信道估计装置和频率误差测量方法。
By doing so, there will only be standard frequency error in theory and decrease the measuring error greatly.
这样使测频误差在理论上只含有标准频率误差，可以使测量误差降低。
The real part of permeability decreases as the measuring frequency increasing.
其磁导率实部随测试频率的增加而下降。
This paper presents a detailed discussion of the method for measuring low frequency noise in operational amplifier devices as well as an analysis of some key problems in the measuring process.
本文中详细给出了运放器件低频噪声的测试方法并对测试过程中的若干关键问题进行了深入剖析。
The water sound speed and temperature can be calculated by measuring Brillouin scattering frequency shift.
借助测量水体布里渊散射的频移，可得到水体声速或温度。
The frequency methods of measuring sine signal are introduced, which are traditional spectrum estimation and modern spectrum estimation.
介绍了测量正弦信号的频域方法——传统谱估计方法及现代谱估计方法。
Measuring for the beat error (frequency error) : Numerical display in milliseconds. Resolution is 0.1 milliseconds; the measuring range is 0-9.9 ms.
偏振(频率错误)测量：数值以毫秒显示。分辨率是0.1毫秒，测量范围是0—9.9毫秒。
Measuring for the beat error (frequency error) : Numerical display in milliseconds. Resolution is 0.1 milliseconds; the measuring range is 0-9.9 ms.
偏振(频率错误)测量：数值以毫秒显示。分辨率是0.1毫秒，测量范围是0—9.9毫秒。
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