查询词典 attenuation coeffcient

On the basis of wavelet transform and S transform,through popularizing basic wavelet, the basic wavelet containing 4 kinds of unknown parameters (amplitude, energy attenuation rate, energy-delay time and apparent frequency ) was constructed, realizing generalized S transform.

在小波变换和S变换基础上，通过对基本小波的推广，构建含有四类待定参数(振幅、能量衰减率、能量延迟时间及视频率)的基本小波，实现广义S变换。

Experiments prove that the notch attenuation value can reach -330 dB at arbitrary frequency by adjusting phase-shift parameter.

实验表明：通过改变相移参数值，在任意频率点上陷波器的衰减值可达-330 dB。

This paper mainly inverses the S wave factor using the surface wave attenuation characters. The result shows that the lateral and vertical variations of Qβ are very clear in the whole area and the asthenosphere, and some big structure area is also shown very clearly.

结果显示：研究区域的Qβ横向和纵向变化非常显著，能够明显区分软流圈结构，各个大构造单元的Qβ结构呈现出显著的变化。

The relation of directions of phase constant and attenuation constant in conductive media ［J］.

导电介质中电磁波相移常量与振幅衰减常量的方向关系［J］。

The light transmission attenuation constant is achieved to determine rupture location of composite materials.

同时对空心光纤的衰减特性做了实验研究，得到了空心光纤的衰减常数，并且应用于断裂测量。

Assuming that viscosity varies linearly with frequency, this implies that the attenuation per wavelength is constant.

假定粘弹体随频率线性变化，这意味着单位波长的衰减为常数。

The phenomenon of large attenuation constant with low radiation efficiency is clearly shown in the expression.

该表达式清楚地显示了截止区中大衰减常数低辐射效率的现象。

The analysis shows that the influence of plasma frequency on the attenuation constant of MPCA is increasing, and an extremum point is appeared.

结果表明，强磁场时等离子体频率对天线衰减常数影响增大，且有一极值出现。

According to first-order reaction, nitrobenzene's total natural attenuation rates constant are 0.063 5/h and 0.005 9/h respective of silt medium and sand medium.

根据一级动力学方程计算得出，硝基苯在淤泥介质中的自然衰减总速率常数为0063 5/h，在砂砾介质中的自然衰减总速率常数为

Furthermore, we separate the contribution from the leakage and cutoff effect to the attenuation constant, and then deduce an expression to determine the leakage in the reactive region.

根据该准则我们还进一步分离出泄漏效应和截止效应各自对衰减常数的贡献，并推导出在截止区内表征辐射能力大小的表达式。

But GST= 0.156, Nm=1. 588. As a result, the foundation of Youyongchi Avicennia marina population was the result of the migration of hypocotyles and human factors.

这项工作可以为海岸防护林中新引进种类的判定以及为研究种群建立者效应方法的确定提供科学依据。

The two-dimensional CDRC-ADI-FDTD update equations for collision unmagnetized plasma are induced. The unconditional stability of the CDRC-ADI-FDTD formulation for collision unmagnetized plasma is obtained by the examples.

推导了碰撞非磁化等离子体中的二维CDRC-ADI-FDTD迭代公式，并用算例验证了碰撞非磁化等离子体CDRC-ADI-FDTD算法也是无条件稳定的。