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The electric characteristic parameters of this novel sleeve antenna are calculated, including the input impedance, voltage standing wave ratio, 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、增益及辐射方向图等电特性。

A small size MMW CP microstrip antenna is designed using sequential phase rotation method in this paper.The simulation result shows that this antenna has wider impedance bandwidth and axial ratio bandwidth.

采用连续相位旋转法设计了一种四单元的小尺寸的毫米波圆极化微带天线阵列，仿真表明：该天线具有较宽的阻抗带宽和轴比带宽。

Considering the shortage of voltage sensitivity in small source impedance ratio systems and with high resistance earth fault, the voltage fault component is replaced by memory voltage component to determine the fault's direction.

针对无穷大电源系统中和经高阻接地时存在的电压灵敏度不足的问题，采用保护安装处的记忆电压代替其电压故障分量，从而使保护可以可靠地判别出故障的方向。

Based on logging and petrophysics analysis,the elastic parameters(such as elastic impedance,Poisson's ratio and so on) of the effective reservoir are obtained by prestack inversion,and fluid properties are analyzed,which can provide reference for drilling well location.

针对苏里格地区盒8段有效储层厚度薄，横向变化快，常规解释结果多解性强的特点，从测井、岩石物理分析入手，开展叠前地震反演提取有效储层的弹性参数，综合分析预测储层的含流体特性，为钻探井位提供依据。

C Over a frequency range of 0 – 100 kHz, the measurement circuitry is to have a frequency response (ratio of indicated to actual value of current) that is equal to the ratio of the impedance of 1500 ohm resistor shunted by a 0.15 F capacitor to 1500 ohms.

频 率高于0-100KHz，测量电路有一个频率响应(标记电流和实际电流的比值)并且等于1500的输入阻抗并联上一个0.15F ，的电容与1500的比值。

Use bifurcation curve and analyze the effect on voltage stability by static load model,propose that critical voltage decrease with the constant impedance ratio increasing.

使用分岔曲线，分析了负荷静态模型对系统电压失稳临界点电压值的影响，得出系统发生电压失稳时临界电压值随负荷模型中恒阻抗负荷比例的增加而降低，并对北京电网进行实例分析。

Sections such as P- and S-wave impedance, velocity ratio of P- and S-wave,λρ, and μρ, as well as crossplotting sections of different lithological parameters were generated.

利用这些成果，可以得到比常规波阻抗反演更准确、更丰富的储层信息，在目标储层的含气性识别中取得了很好地效果。

The transfer function of the LLC resonant converter can be obtained by using the circuit impedance, ratio of resonant inductance, and quality factor.

其后级之半桥LLC谐振式转换器藉由推导电路阻抗、谐振电感比例值与品质因数得到转移函数，以及利用适当的谐振电路的设计与切换频率的调变的方式达到输出电压稳定，并且令功率开关具有零电压切换之功用，以降低功率开关的切换损失。

An alternative method of determining the site impedances is to calculate an impedance estimate for each time-frequency element.

另一种方法确定网站的阻抗是计算阻抗估计为每一次频率的元素。

On the basis of instantaneous forced analysis to short circuit of power transformer and numerical value calculation using low voltage impulse analysis, the paper presents the essentiality of winding distortion after short circuit of power transformer. By contrasting the three main ways of the world such as low-voltage impulse、 short circuit impedance analysis and frequency response analysis , FRA is adopted for distortion testing. Then we design a new testing instrument of transformer winding distortion—testing system of transformer winding distortion.

本文首先在对电力变压器短路时的瞬时受力分析及所受电磁力的有限元法的数值计算的基础上，论证了电力变压器短路以后进行绕组变形测试的必要性；然后通过比较的方法对目前国内外主要使用的三种方法：低压脉冲法、短路阻抗法和频率响应法，进行了一一对比，并根据对比结果，确定在本课题中使用频响法；最后在理论研究的基础上，设计出了一种新型的变压器绕组变形测试仪——电力变压器绕组变形测试系统。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了