对于砂岩储层，含气砂岩的声阻抗比含油和含水砂岩的声阻抗低，利用这种差异可以直接识别储层中气体。
For sandstone reservoir, the acoustic impedance of gas-bearing sandstone is lower than that of oil - and water-bearing sandstone, gas in reservoir may be directly recognized by using this difference.
之后，用SIR的原理讨论了平行耦合带通sir滤波器的设计方法，并分析了不同阻抗比的SIR滤波器之间特性。
Then the design methods of the parallel coupling SIR band-pass filter has been discussed, and analysed the different characteristic of the SIR resonator with the different impedance rate.
阻抗将会按照匝比的平方反射回来。
Impedance will reflect back as the square of the turns ratio.
给出了非合金接触情况下，PNP型HBT基极比接触电阻和接触阻抗的解析计算方法和结果。
In this paper, we proposed a theoretical method and results for calculating special contact resistance and contact impedance of base contact of a PNP type HBT.
利用相应的高层次模型，详细分析并仿真了电流源匹配误差和电流源输出阻抗对DAC的非线性误差nl、信号噪声失调比SNDR、无杂波动态范围SFDR的影响。
With corresponding models how the matching errors and output resistance of current source affect the NL, SNDR and SFDR of DAC is analyzed and simulated in detail.
因而电解电容器的ESR、ESL以及由此而产生的阻抗频率特性将显得比电容量更为重要。
So, ESR, ESL of the electrolytic Capacitor and the resistance frequency characteristic followed by it are seemed to be more important than capacitance.
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。
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.
当频率很低时，阻抗矩阵中矢量磁位的贡献比标量电位的贡献小得多。
At very low frequencies, the contribution from the vector potential to the impedance matrix is much smaller than the contribution from the scalar potential.
具体设计内容包括：设计具有输入阻抗大、高增益和高共模抑制比的脑电信号调理电路；
The main design work as follow: the former disposal circuits were designed, and the circuit possesses very high input resistance, common-mode rejection and voltage gain;
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。
By comparative analysis, the dependence of the resonant frequency, voltage standing wave ratio, bandwidth and input resistance on different geometric parameters is obtained.
极化曲线外推法和电化学阻抗研究都表明纳米晶铜的腐蚀电流比微米晶铜高，而极化电阻要低。
Both the Tafel plots and EIS study demonstrated that the nc copper exhibits a higher corrosion current and lower polarization resistance than its mc couterpart.
采用线性电位扫描和电化学交流阻抗等电化学测量技术 ，对高深宽比掩膜条件下微电铸镍的电极反应动力学过程进行了初步研究。
The kinetics of the electrode reaction is preliminarily studied by linear potential sweep technique and electrochemical impedance while electrodepositing Ni for high aspect ratio structures.
在综合了回声法和频谱振幅比法优点的基础上，提出等效声阻抗法。
Based on synthesizing advantages of the pulse echo and spectral ration techniques, a new method, the equivalent acoustic impedance technique is proposed.
仪表放大器电路以其高输入阻抗、高共模抑制比、低漂移等特点在传感器输出的小信号放大领域得到了广泛的应用。
Instrumental amplifiers with high input impedance, high CMRR and low drift are widely used in the small signal amplifying field.
讨论了阻抗参数与导纳参数，复模态参数与实模态参数的转比关系；
Then, the transformation equations relating physical parameters with admittance parameters and those relating complex modal parameters with real ones were determined.
该系统给出了新的阻抗测量算法，并通过选择补偿电感值和变压器变比的方式使电力线阻抗维持在恒定的值上。
This system can measure power line impedance accurately using a new arithmetic, and can adaptively match the power line impedance.
开关变换器的负载效应对变换器升压比、输出效率、输入相位差、小信号稳定度、输入与输出阻抗之比等有着非常重要的影响。
Switching boost converter's load effect has great effect on input phase, stability of small signal, ratio of input and output impedance, and the ratio of Boost converter's output efficiency.
数值计算结果表明，用修正公式设计的阻抗匹配器，在2<40范围内，驻波比全都小于1.08。
The standing-wave ratio in line all is smaller than 1.08, for 2<40.
分析了CT匝[数]比误差对高阻抗差动保护的影响，并介绍了匝[数]比误差的测量方法。
The influence of CT turn ratio to high impedance differential protection is analyzed, and the method of measuring turn ratio error is also introduced.
利用阶跃阻抗谐振器SIR作为同轴腔滤波器的基本谐振单元，设计了一个利用交叉耦合来实现广义切比雪夫函数的同轴腔体滤波器。
Stepped Impedance Resonators (SIR) taken as basic resonator unit of coaxial filters, a kind of generalized Chebyshev coaxial-cavity filter through cross coupling is designed.
利用阶跃阻抗谐振器SIR作为同轴腔滤波器的基本谐振单元，设计了一个利用交叉耦合来实现广义切比雪夫函数的同轴腔体滤波器。
Stepped Impedance Resonators (SIR) taken as basic resonator unit of coaxial filters, a kind of generalized Chebyshev coaxial-cavity filter through cross coupling is designed.
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