查询词典 reflection factor

Through the analysis of the loss and threshold characteristics of a laser diode, the threshold current density of LD with external feedback is calculated, according to the theory of multi-beam interference and the definition of equivalent reflection factor.

通过对半导体激光器的损耗和阈值电流特性的分析，引入等效反射系数的概念，根据多光束干涉的原理，导出了在外腔反馈作用下LD的阈值电流公式。

The vitrinite reflection factor in source rocks Ro is 0.3-0.65%, a few up to 0.2%.

烃源岩中镜质体反射率R〓在0.3％-0.65％，个别可达0.8％。

Abnormal pressure ; forward modeling ; reflection factor ; AVO curve

异常压力；正演模型；反射系数； AVO曲线

This article mainly carries on the analysis with new weather radar data characteristic in this rainfall process. With the analysis of the reflection factor, the wind profile and the rainfall estimation, we know that the strong wind vertical change and sufficient water vapor condition have the extremely vital role to the development and the maintenance of the convection storm; The new weather radar has the very good instruction function to the weather forecast, specially at the rainfall estimated and in the catastrophe weather forecast and the short-time forecast.

本文主要对这次降水过程中的新一代天气雷达资料特征进行分析，通过对反射率因子、风廓线和降水估测等主要产品的分析，表明较强的风的垂直切变、充足的水汽条件对对流风暴的发展和维持有非常重要的作用；新一代天气雷达对气象预报工作有很好的指导作用，特别在降水估计、灾害性天气预报和短时临近预报中有非常重要的意义。

By contrast, OXF did not affect the pulsatile nature of blood flows in arteries in terms of aortic characteristic impedance, wave transit time as well as wave reflection factor.

研究结果显示长期给予OXF抑制糖尿病鼠的CPT-I，无法防止糖尿病所引发的动脉硬化。

When the velocity proportion of longitudinal wave to transverse wave of a bed is distinctly different from that of another bed, the reflection factor will be changed with the variation of incident angle according to the elastic wave mechanics, which is the foundation of AVO theory.

由弹性波动力学理论可知，当一种岩层纵、横波速度与另一种岩层纵、横波速度之比明显不同时，反射系数随入射角的变化而变化。

Therefore, the choice of single mode in the examination and the frequency-thick band of mode has been given a particular illumination separately in the paper, following a relative numerical simulation. And a multi-cyclical sine signal modulated by Hanning window is used to simulate the excitation wave, and then an inspected ring of nodes is established to receive the echo, finally how the length of the circumferential cracks, the width of the axial cracks and the degree of the thickness-reduce effect the result is explained through the analysis of the result, further more, the reflection factor in the defect has been calculated.

因此，本文也就单一检测模态的选择以及模态频厚积段的选择分别予以了阐述，并有针对性的进行了数值计算：应用Hanning窗调制的多周期正弦波模拟单音频激励信号，并设置监测质点环接收回波，通过分析说明了管道的周向裂纹、轴向裂纹以及点蚀缺陷对缺陷回波所产生的影响，并进一步计算了缺陷处的反射系数。

Aformula which describes the transient process from beginning traveling waveto steadytraveling wave was deduced and the concept of initial traveling wave stagefirst was defined and its duration was given. It leads to a conclusion that reflectionfactor is a time dependent function, and variation range and reflection factor atdifferent stage were presented .Based on unified traveling wave theory andtransmission line model of reflective terminal with energy storage element , powerpolarity of initial traveling wave was analysed with both physical and mathematicalmethod.

通过理论推导得出从初始行波到稳态行波过渡过程的数学公式，统一了不同阶段的故障分量信号；定义了初始行波的概念，并指出了其持续时间的影响因素，针对末端含有储能元件系统，从物理和数学两方面剖析了初始行波的功率极性；通过分析提出反射系数是时变函数，给出了在不同暂态阶段行波反射系数的变化范围。

The real data verification shows that the wavelet, reflection factor and acoustic impedance given by PCGA are more accurate, quicker convergent and value stable than the existing direct sparse inversion method.

用实际数据检验算法，表明预条件共轭梯度法反演的子波、反射系数和波阻抗要比直接稀疏反演精度高、收敛快、数值稳定。

I mean, would like to portray life on canvas can feel the object, I hope they are changing, there are times of reflection and transmission of information, the plastic arts in a reduction of contemporary works is also a factor.

我的意思是想在画布上描绘生活中所能感觉到的物象，但愿它们是变化的，有时代信息的反射与传递，造型艺术中的某种还原这也是作品当代化的一个要素。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。