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 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。
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.
激光相位多普勒(PDA)能够同时测量粒子的速度、大小和相对折射率。
Laser phase Doppler anemometry (PDA) technology can be used to measure moving particle's velocity, size and relative refractive index simultaneously.
通过实验获得了声相位图与声幅度图，并通过数字图像处理获得了相应的速度图与衰减图。
After processing the amplitude image and phase image which was come from experiment we obtain the distribution of the velocity and attenuation.
在调光器的相位控制操作，电机速度控制器，和类似的应用。
Phase control operations in light dimmers, motor speed controllers, and similar.
该系统的关键部件是一个数字中频接收机，利用DSP和FPGA实时获取幅度和相位数据，从而提高了测量速度和灵活性。
The key component of the system is a digital intermediate frequency receiver employing DSP and FPGA to obtain amplitude and phase data in real-time, which improves measurement speed and flexibility.
相位对比法(PC)测门静脉血流速度、每分钟流量。
Portal velocity and portal flow with phase contrast (PC) were measured.
在空间载波条纹位相检测中，滤波函数的选择对解调相位的精度和速度起着决定性的作用。
The property of digital filters for spatial phase detection significantly influences the accuracy and the speed of phase demodulation.
利用等效相位中心原理建立了天线斜置情况下三通道运动目标回波信号模型，给出了天线倾斜角对动目标检测、最小可检测速度和盲速的影响。
The echo model of moving target is established based on three channels with the slant-placed antennae in terms of the equivalent phase center principle.
对于中程距离的测量，从测量速度、精度和可靠性的折衷方面来讲，相位式激光测距法优于其它的测距法。
In terms of speed, accuracy and reliability for medium range measurement, phase shift laser rangefinder is superior to other methods.
由于散斑图中随机噪声的存在，数字散斑中的图像处理、包裹相位的展开以及计算速度与精度的问题，仍是当前散斑研究的主流方向。
Image manipulation, unwrapping of wrapped phase, calculation speed and precision are still the mainstream study direction due to amounts of speckle noise.
在P ID校正中着重加强微分超前调节作用，缓解了系统相位滞后的问题，从而使系统得到较好的稳定度和响应速度。
It focuses on differentiation in PID adjustment, amends the phase lag problem and gets better systematic stability and response speed.
实验表明，该传感器相位移动小，干扰噪声抑制能力强，响应速度较快；
Experiments showed that it has many advantages, such as small phase displacement, high noise suppression capability, rapid response speed and high accuracy.
粘性假设正比于流体速度，相位存在差异。
The friction term is assumed to be proportional to the flow velocity with a phase difference.
位置、速度、扭矩和相位控制，如电子传动装置和电子凸轮轮廓在复杂的运动中也可以获得。
Position, speed, torque, and phase control such as electronic gearing and electronic cam profiles are available for complex motion.
该跳频源在相位噪声、调频速度和杂散抑制等方面的性能指标较高。
Using the method and formula above, a L-band synthesizer has been finished. It has satisfactory performance on phase noise, frequency jump speed and spur rejection.
目的探讨相位对比法mri测量中心肺动脉各血管的血流速度和血流量的准确性以及临床应用价值。
Objective To assess the accuracy and application values of phase-contrast MRI by measuring the flow velocity and volumes of the central pulmonary arteries.
这种直接数字式频率合成技术(DDS)具有频率值转换速度快、频率值分辨率高、控制频率的相位值连续等优点。
The technology of DDS has many values, such as the speed of hopping frequency is very high, the resolving power of frequency is also high.
并对系统的频率特性进行了分析，表明基于该技术的微加速度计系统在工作频段内噪声能够得到有效的消除，且具有近似的线性相位。
The analyses of frequency characteristic of the system demonstrate that the noise in effective frequency band is eliminated and the phase of the system is approximately linear.
在线调节步长改变电压收敛速度，设计锁相控制电路，自动同步跟踪电网频率和相位。
The online variable step can also regulate the voltage convergence rate, and the phase-locked control circuit is designed to synchronously trace frequency and phase of power grid automatically.
得到了原子重力仪的相位差与重力加速度的关系。
We obtained also the relation between gravity and the phase difference of the atom gravimeter.
该方案用平滑的波形来替换前后码元的不连续跳变，从而得到相位连续的时域波形，波形平滑、频谱主瓣窄、滚降速度快。
This scheme uses smooth wave instead of discontinuous wave, so the wave in time field is continuous phase and has good frequency spectrum characteristics.
介绍了一台自制的利用相位差法测量光速的仪器的基本原理和方法，并通过对光在空气中的传播速度的测定，使大家对用相位变化测量光速仪器有所了解。
This article introduced the basic theory and method of measuring the velocity of light using the method of phase difference and how to measure the velocity of light using phase difference in air.
本文提出了一种相位干涉法。用来测量表面声波速度的相对变化。
A phase interference method, for measurement of the relative change of surface acoustic wave velocities, is presented.
相位编码雷达可以采用一种检测方法实现对该宽带多普勒信号的检测，其结果不但可以指示速度，而且还可以作为速度选通的抗干扰措施。
A detection method will let phased coded radar to detect such wideband doppler signal, whose result not only gives speed information, but also filters ground echo by speed as a anti-jamming measure.
直接数字频率合成器dds具有极高的分辨率、频率转换速度快、相位噪声低等优点。
Direct Digital Synthesizer (DDS) has the advantages of high frequency resolution, rapid frequency change rate and low phase noise.
本文报道了一种基于脉冲回波相位谱的超声波速度测量方法，并给出了它的详细理论推导过程。
This paper presents the development of a pulse-echo measurement method, based on the use of a phase spectrum to determine the ultrasonic wave velocity. A detailed descripsion of the theory is given.
通过对COAA算法采用变步长迭代提高二次相位误差估计的精度和速度，增强算法的实用性。
To improve the phase error estimation precision and speed, modified iteration step is used, resulting in more effective application of COAA.
通过数学分析得出振动质点的速度与强迫力之间的相位差。
The phase difference between velocity of vibrate particle and force was analysed.
通过数学分析得出振动质点的速度与强迫力之间的相位差。
The phase difference between velocity of vibrate particle and force was analysed.
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