查询词典 impedance ratio

Finally, determine reservoir lithology and pore fluid properties. This method requires only small and medium angle seismic data, and all other elastic parameters are from the elastic density ratio and acoustic impedance.

该方法仅需要近、中角度的地震数据，其他弹性属性参数是由弹性密度比与声波阻抗之间的关系通过道运算获得，提高了计算效率，可用于绝大多数采集条件下获得的地震数据叠前反演。

Although impedances of both fresh and frozen-thawed bluntsnout bream decreased as frequencies increasing from 1 kHz to 20 kHz, change ratio of impedance of fresh samples was evidently higher than that of frozen-thawed ones.

结果表明：从1 kHz增大到20 kHz，冰鲜和解冻团头鲂的阻抗均随着频率的增大而减小，冰鲜团头鲂的阻抗相对变化Q值明显大于解冻团头鲂。

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。

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。

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 voltage standing wave ratio is a measure of how well a load is impedance-matched to a source.

文中给出了反射系数、阻抗和导纳的作图范例，并用作图法设计了一个频率为60MHz的匹配网络。

For a constant impedance load or a constant current load, if regulating the secondary voltage by making the changer ratio higher, the primary voltage will get much lower while the load power is restoring, and the power will then lose balance. For a constant power load or a motor load, since the change of OLTC has no or little influence on the load power, the voltage of primary side almost has no change whether the tap operates or not. The influence on the voltage stability with respect to the dynamic restoring load which is sensitive to voltage is also discussed.

对于恒阻抗和恒电流型负荷，在变比上调恢复副边电压的情况下，负荷功率恢复，又使原边电压下降，可使系统功率失去平衡，而对于恒功率负荷和电动机负荷，OLTC的变化不会引起负荷功率的恢复，OLTC的变化对系统电压稳定有利；同时研究了对于一般电压敏感和具有动态恢复特性的负荷，反调分接头对电压稳定性的影响。

The distribution of electromagnetic field inside a microstrip antenna as well as the characteristics of resonance and impedance and radiation of the microstrip antenna are analyzed by means of the ratio.

并利用此概念来分析加载短路钉微带天线内部的电磁场分布和谐振特性、阻抗特性以及辐射特性等。

The authors analyze the operation characteristic of distance protection of transmission line connecting wind farm with power grid under the variation of parameters such as the amplitude ratio of electromotive force at both sides, the phase difference of electromotive force at both sides, equivalent impedance of sources, system frequency and so on; based on the real-time current and electromotive force at wind farm side as well as the information of wind power generators participating power generation, a method to adaptively set the operation boundary of distance protection by use of the information at wind farm side only is proposed.

文章分析了风电场和电网联络线的距离保护随电源电势幅值比、电势相位差、电源等效阻抗、系统频率等参数变化时的动作特性，并基于风电场侧的实时电流和电势与参与发电的发电机信息，提出了仅利用风电场侧信息量自适应整定保护动作边界的方法。

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