在微波大衰减测量中，噪声是一项主要误差来源。
Noise is one of important errors in attenuation measurement, especially in the large attenuation measurement.
研究了单通道和双通道微波衰减测量系统中的射频泄漏所导致的测量误差。
The attenuation measurement error due to RF leakage in a single channel and a dual channel microwave attenuation measurement system is investigated.
为了满足大衰减量值的溯源，研制成功了新的PAS 1型衰减测量接收机和新的国家标准装置。
In order to meet the traceability of large attenuation, a new model PAS-1 attenuation measuring receiver and then a new national attenuation standard system are developed.
陈述了利用扫频信号源、标量网络分析仪和宽带喇叭天线等构成的系统对微波衰减测量的过程，对该方法的诊断误差进行了讨论。
The process of attenuation measurement is presented, which utilizes a system consisted of a sweep oscillator, a pair of broad-banded horns, and a scalar network analyzer, etc.
该衰减电路是一种降低静电计交流响应的低通滤波器，使我们可以准确地进行直流弱电流的测量。
A damping circuit is a type of low pass filter that reduces the electrometer's ac response so the low DC current can be measured accurately.
跨接在电压源上的任何外部分流电阻都会使测量的电压衰减，如图2 - 3所示。
Any external shunt resistance across the voltage source will attenuate the measured voltage, as shown in Figure 2-3.
泄漏电流随时间呈指数衰减，所以通常需要在一个已知的时间期间内施加电压(浸润时间)，然后再测量电流。
The leakage current will decay exponentially with time, so it's usually necessary to apply the voltage for a known period (the "soak" time) before measuring the current.
测量中使用了光纤位移传感器，对衰减与位移的关系进行了动态测量。
A displacement optical fiber sensor was used for dynamic measuring the relationship between attenuation and displacement.
应该等待足够的时间，使开关瞬态信号衰减，电流达到稳定，然后再进行测量。
The current should be measured after a sufficient settling time to allow the switching transients to decay and the current to stabilize.
然而，高阻材料不允许电荷迅速衰减，就可能产生不稳定的测量结果。
However, high resistance materials don't allow the charge to decay quickly, which may result in unstable measurements.
可以通过测量多个破片的飞行速度与飞行姿态角，推导出速度衰减系数。
After measuring the velocities of many fragments and the flying Angle, the coefficient of velocity attenuation can be calculated.
皮电流计算与测量结果在波形、振荡周期、衰减规律等方面有较好的一致性。
There a good coincidence in the calculation of shield layer current and measuring results in the aspect of waveform, oscillating circle and attenuation law.
模型验证是通过计算水波波高衰减率和底床软泥体输移速度，并与有关的实验测量数据进行比较。
Model verifications are given through comparisons between the calculated and the measured bed mud mass transport velocities as well as the rate of decay of water wave heights.
核磁共振测量中，由于不均匀磁场相位滞后引起的驰豫或衰减。
In a nuclear magnetic resonance measurement, the decay, or relaxation, caused by dephasing in an inhomogeneous magnetic field.
在电力系统中，任何故障或扰动都会使得系统中出现衰减直流分量，它将影响继保装置的测量精度。
Decaying DC offsets are generated following any faults or disturbances in an electric power system, and the measure accuracy of digital relay devices is affected.
在光纤衰减的测量中，背向散射法显示出很大的优越性。
In the measurement of optical fiber attenuation, the backscattering method has been shown to have great advantages.
以波导耦合理论为依据，设计了集光电为一体的波导衰减系数测量系统。
This article is based on coupling theory and has been designed the incorporating photoelectricity measuring device of waveguide modulus decay.
方法观察模块浓度的不同所致颜色与透明度的变化，并对PAA模块的声学特性包括密度、声速及声衰减进行测量。
Methods The color and transparency of different concentration phantoms were observed. Properties including density, acoustic speed and acoustic attenuation of PAA gel phantom were measured.
提出了一种无需施加磁场、利用发射电流衰减速度测量真空开关灭弧室真空度的新方法。
A new method is presented for measurement of internal pressure of vacuum interrupters, having no use of magnetic fields but using decay velocity of emission current.
利用配有电压自动衰减电路的铁电材料测试系统测量了PZT铁电体材料样品的电滞回线。
The PZT ferroelectric slice sample was measured by the system with the automatic voltage-decaying circuit, and hysteresis loops of the sample was exhibited.
对于这些应用来说，采用一种可变的衰减电路足以降低交流干扰，以便进行有意义的测量工作。
For these applications, a variable damping control may reduce the AC pickup enough to make meaningful measurements.
本装置用超声脉冲回波与定标指数波形比较的方法测量超声衰减。
An instrument for measuring ultrasonic attenuation by means of comparing the ultrasonic pulse echo with a calibrated exponential decay wave-form is described.
所得结果可直接用于雷达定量测量降水时的衰减订正。
The formula can be applied directly into correction for attenuation to radar echoes during data processing for quantitative measurement of precipitation.
对于同时具有非线性阻尼力矩和非线性回复力矩的情形，探讨了利用横摇自由衰减试验来测量横摇阻尼的方法。
The method of rolling decay model test for determing damping coefficient was discussed for the case of combined non-linearities both in terms of damping and restoring moment.
利用传播衰减法测量梁结构阻尼应考虑边界反射等影响。
Thus, the boundary reflection effect and other effects must be considered during using the propagation-attenuation method to measure damping of a beam.
在TGS透射测量中，线性衰减系数值的图像重建问题是TGS的难点和核心问题。
The image reconstruction problem of linear attenuation coefficients is very difficult and central in transmission TGS.
设计单波长准直光透射实验并通过实验测量组织模拟样品的总衰减系数；
Single wavelength collimation transmittance experiment is designed and conducted, with total effective attenuation coefficient of tissue phantoms being obtained.
设计了一个根据激光衰减的新方法，用来准确地测量相分离，从而测量有和无功溶剂的汽油-甲醇掺和物的水容忍度。
A new method based on laser attenuation was devised to accurately measure the phase separation and, in turn, the water tolerance of gasoline-methanol blends with and without cosolvents.
设计了一个根据激光衰减的新方法，用来准确地测量相分离，从而测量有和无功溶剂的汽油-甲醇掺和物的水容忍度。
A new method based on laser attenuation was devised to accurately measure the phase separation and, in turn, the water tolerance of gasoline-methanol blends with and without cosolvents.
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