通常认为地震波高频衰减的物理机制主要是滞弹性的吸收，本文通过如下三方面的研究认为地震波高频衰减的物理机制主要是弹性的微观多次散射波的相互干涉。
In this paper, I present three studies on high-frequency seismic attenuation and propose that the physical mechanism results from the interference of elastic microscopic multiple scattering waves.
但是否可以通过研究反演大地吸收衰减和减少采集的高频噪声达到勘探的目的呢？
But whether it can reach the prospecting aim by study for inversion of attenuation by earth absorption and by decreasing high frequency noise?
这0805大小的芯片衰减器具有优良的高频特性。
This 0805 size chip attenuator exhibits excellent high frequency characteristics.
在低阻区，高频电磁方法的结果一直是令人失望的，其原因是这种介质使信号严重衰减。
But in regions of lower resistivity HFEM results have been disappointing due to severe attenuation of source waves by the medium.
本文介绍高频光电导衰减法硅单晶少子寿命测试技术的改进。
Improvement of high frequency photoconductive decay technique for measuring silicon minority carrier lifetime is described.
本文导出了不考虑邻相影响和考虑相邻影响条件下的相地耦合高频桥路衰减公式。
The attenuation formulae of HF bridge circuit with phase-ground coupling and adjacent phase impact or not are derived in this paper.
这种高功率薄膜衰减器系列具有卓越的高频特性。
This high power thin film attenuator series exhibit excellent high frequency characteristics.
这种薄膜衰减器系列具有卓越的高频特性。
This thin film attenuator series exhibit excellent high frequency characteristics.
这1206大小衰减器具有良好的高频特性。
This 1206 size attenuator has excellent high frequency characteristics.
本文讨论了常用的噪声系数测试方法—Y因子法中高频及中频衰减器本身失配和测试系统中其它部分的影响所造成的测试误差。
This paper discussed the error in the measurement of noise figure—The method of Y factor , The error is caused by mismatch of RF attenuater and IF attenuater and the others in the measurement system.
根据特高频信号传输衰减原理进行衰减-吸潮性试验。
Attenuation-moisture test was carded out based on the principle of UHF signal transmission attenuation.
这一现象改变了通过导线的电流分布、从而改变导线的阻抗，结果是使信号在高频下衰减。
This phenomenon alters the distribution of the signal current throughout the wire and changes the effective resistance on the wire .
用高频光电导衰减法（PCD）研究了热氧化钝化对直拉硅少子寿命的影响。
The effects of surface thermal oxidation on the minority carrier lifetime of Czochralski (CZ) silicon wafers are investigated by photoconductive decay (PCD) method.
高频率和随之而来的地层衰减严重制约了测量范围。
These high frequencies and the accompanying formation attenuation severely limit the range of investigation.
结果高频背向散射系数较声速、声衰减更能反映组织结构的变化，高频超声图像具有高的分辨率。
Results Compared with sound velocity and attenuation, the backscatter coefficient could reflect the structural change of biological tissue. The high frequency ul…
结果高频背向散射系数较声速、声衰减更能反映组织结构的变化，高频超声图像具有高的分辨率。
Results Compared with sound velocity and attenuation, the backscatter coefficient could reflect the structural change of biological tissue. The high frequency ul…
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