VSWR? Voltage Standing Wave Ratio?
电压驻波比?。
This paper introduces a kind of measuring method of standing wave ratio on-line.
驻波比是衡量雷达发射机和天馈系统工作状态的一项重要指标。
The antenna and cable must be carefully matched to ensure a low Standing Wave Ratio (SWR).
小心地将天线与电缆匹配，以确保低定波比率（SWR）。
The Finite Difference Time Domain(FDTD) method was used to calculate the Voltage Standing Wave Ratio(VSWR) of a quasi-Yagi antenna.
介绍时域有限差分（FDTD）法计算准八木天线驻波比的算法实现方法。
Therefore, the author try to utilize standing wave ratio of the microwave transmission line theory to measure plant water content in this paper.
为此，本文首次提出尝试利用微波传输线理论中的驻波原理测量乔木茎干含水率。
Due to semiconductor process we must trade off between input voltage standing wave ratio (VSWR) and Noise Figure. In this paper, a balanced LNA is adopted.
由于半导体工艺制程的关系，一般来说低噪声放大器噪声匹配和输入端驻波比匹配是矛盾的。
By comparative analysis, the dependence of the resonant frequency, voltage standing wave ratio, bandwidth and input resistance on different geometric parameters is obtained.
通过比较分析，得到了天线谐振频率、谐振点电压驻波比、带宽以及输入阻抗随不同几何参数的变化规律。
The utility model has the characteristics of light weight, small dielectric gain loss, low dielectric thermal noise temperature, small input voltage standing wave ratio, etc.
本实用新型具有重量轻、介质增益损失小，介质热噪声温度低、输入电压驻波比小等特点。
The electric characteristic parameters of this novel sleeve antenna are calculated, including the input impedance, voltage standing wave ratio (VSWR), horizontal gain and radiation pattern.
研究了这种新型套筒天线的输入阻抗、电压驻波比（VSWR）、增益及辐射方向图等电特性。
Three factors seemed to determine whether the team spotted one big wave in the wine or several smaller ripples: the ratio of the level of wine poured in to the diameter of the glass;
三个因素看来是决定了这个团队发现的是葡萄酒中的一个大的波动还是一些较小的波纹：倒入的葡萄酒的水平面与葡萄酒杯直径的比率；
Pulse width Modulation device is a circuit which can produce square wave signal with fixed period and adjustable pulse duration ratio (pulse width).
脉宽调制器是一种能够产生周期固定而占空比(脉宽)可调的方波信号的电路。
A new technique for picking the first S-Wave arrival is presented by multiplying energy ratio of the long window to the short window by the square of the amplitude envelope of waveforms in the paper.
提出了利用波形长短时窗能量比值与波形信号能量包络的平方乘积检测横波初至的新方法。
It does not require irrotational conditions and the limitation of the ratio of wave length to water depth.
它没有无旋条件，没有波高对水深比值的限制。
In addition, the monotonic relations of density, void ratio and sound wave velocities for sands with different water content are also presented.
此外分析了在各种不同含水量时，容重、空隙比与波速的单调变化关系，并给出了相应的表达式。
For the tight sandstone containing gas, only velocity ratio of P wave to s wave and Poisson ratio are sensitive to fluid variation.
而对于致密含气砂岩，纵、横波速度比及泊松比对流体变化相对较为敏感。
In the meantime, fracture developing frequency of Fuyu oil pay zone is analyzed and calculated by using ratio of vertical wave velocity - "crocodile factor" method.
同时，运用纵波波速的比值——“龟裂系数”方法对扶余油层储层的裂缝发育频率进行了分析、计算。
Third-order susceptibility has been determined by the ratio of the input probing beam in tensity to the backward wave intensity in four-wave mixing.
通过测量后向反射波与入射波的强度比，可以确定介质的三阶极化率。
Experimental results showed that error ratio of recognizing t wave end using this method was much lower than that of currently available methods.
实验结果表明用这种方法T波终点的误识率大大小于现有的方法。
The biggest lift drag ratio 3.36 considering viscous effects is obtained at Mach 6 when a proper base conical shock wave angle is chosen.
在设计点附近选取合适的半基准圆锥激波角并考虑粘性影响时，可得到乘波体最大升阻比为3.36；
By comparison with other logging data, the amplitude of Stoneley wave and the ratio of Stoneley wave amplitude to compressional wave amplitude are related to formation permeability.
将它们与其它测井资料对比，发现斯通·利波的幅度及其与纵波幅度的比值与地层的渗透性有关。
The fluctuation circle of aquatic products price between 1978 and 2000 via ratio of variation and harmonic wave was researched.
采用变异率指标与谐波分析法研究了1978-2000年水产品年度收购价格波动的周期性。
Using the speed ratio of longitudinal wave and transverse wave to research transformation of lithology along crosswise and water-carrying fractures, thereby service...
利用纵横波速度比研究岩性的横向变化及含水裂隙，为生产矿井所面临的现实问题服务。
At the end of the annular passage, shock wave occurs when the relative lift is less than 6% and the pressure ratio is less than 0.7, which causes a greater total pressure loss.
在相对升程小于6%、压比小于0.7后，环形通道的末端将产生激波，激波带来较大的全压损失。
Numerical results show that the squeezing ratio decrease at some initial distance when the amplitude increase and the squeezing was best if pluse wave shape near fundamental soliton.
数值结果表明，增大初始振幅在初始一定距离范围内能减小压缩比，接近理想光孤子的脉冲波形压缩效果最好。
Objective The directly sampled pulse wave signals have always a low signal to noise ratio, which leads to difficulties in the following research.
目的采样得到的脉搏波信号信噪比较低，这给后续研究带来了困难，因此消除噪声的干扰是准确进行相关医学测量的关键前提。
Using this method, we can get elliptical wave of any axes ratio from a beam of linear Polarized electromagnetic wave.
用这一方法可以简便地将线极化电磁波转变为椭圆极化波或圆极化波。
The charge utilization ratio is high for multi-point ignition tube experiments in a high-pressure gun, but the chamber pressure wave is high.
某高膛压火炮试验中发现多点点火方案的装药利用率较高，但膛内压力波较大。
This article provides the signal-to-noise ratio module of the range-gating photon counting system and discusses the synchronization between the laser echo wave and the detector gate.
本文给出了距离选通光子计数系统的信噪比模型并讨论了激光回波与探测器选通门之间的同步问题。
This article provides the signal-to-noise ratio module of the range-gating photon counting system and discusses the synchronization between the laser echo wave and the detector gate.
本文给出了距离选通光子计数系统的信噪比模型并讨论了激光回波与探测器选通门之间的同步问题。
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