The thesis includes velocity structure tomography and attenuation structure tomography.
本论文包括速度结构层析成像和衰减结构层析成像。
Attenuation of elastic wave amplitude in rock is affected by its temperature and pressure, filled fluid properties, fluid saturation, rock composition and structure, etc.
弹性波振幅在岩石中的衰减程度受其温压、所含流体性质、流体饱和度、岩石组分、结构等因素的影响。
The karst multi-media structure is high heterogeneity, and the outflow process is simulated by using laboratory experiment, especially the discharge attenuation process is deeply analyzed.
本文借助室内实验装置，模拟了结构不均匀的岩溶多重介质的出流过程，并着重对流量衰减过程进行了分析。
In this paper, a physical model of the structure and attenuation of shock waves in metals is presented.
本文给出了研究金属中激波构造与衰减的一个物理模型。
Two of the most predominant characteristics of Surface Wave are Dispersion and Attenuation which are the effective tools to study the velocity structure and viscidity structure of the earth interior.
频敌和衰减是面波传播中的两个基本特征，利用面波频散和衰减可以有效地研究地球内部速度结构和粘弹性结构。
The attenuation device is designed on the basis of analyzing the product structure and the delay composition.
通过对产品结构、延期药进行分析，设计了衰减装置。
Results:The tumors showed as a thickness or bulky mass of the local supraglottic structure with irregular margin, homogeneous attenuation and slight enhancement.
结果：肿瘤呈局部软组织增厚或团块状肿块，形态不规则，密度较均匀，增强后轻度强化；
Band stop filter made with this structure has narrow gap and steep attenuation.
利用该结构制作的带阻滤波器，阻带窄、衰减陡峭。
The general consideration, design of optical and mechanical structure for an inner attenuation total reflection (ATR) instrument used in infrared Fourier transform spectroscopy were introduced.
介绍了傅里叶变换光谱仪的衰减内全反射装置(atr)的基本原理、光学和机械结构设计。
The motor-cable device was modified so that the optimal control was realized by passive control, with less energy used for the space structure vibration attenuation.
通过简单改造的电机拉索结构，该最优控制能采用无需耗能的被动控制方式实现，为航天结构振动抑制节省控制能量。
The analysis results indicate that the attenuation of additional dynamic stress along depth is reduced with existence of the structure under rail.
结果表明轨下构筑物的存在将减弱列车动应力往深层传递的衰减。
However, because of difficulties in measuring light attenuation in canopy gap and complex structure of forest canopies.
但是、由于林隙结构极为复杂，难以精确地测量林隙上方和周围树冠空隙的透光情况。
The family structure in modern society evolves in a tendency of nucleation, which causes the transformation of family functions, but this doesn't mean attenuation of the function of family security.
现代社会的家庭组织呈现出核心化的发展趋势。家庭组织的演变也促使家庭功能转变，但家庭功能的转变并不表示家庭保障功能的削弱。
Make research on the reaction of bulk solid to silo wall and to attenuation of silo structure while the dynamic response of silo models to foundation's simple harmonic motion is calculated.
在计算筒仓模型对地基简谐运动的动力响应时，研究了散体对仓体的作用及散体对仓体的减振作用。
Make research on the reaction of bulk solid to silo wall and to attenuation of silo structure while the dynamic response of silo models to foundation's simple harmonic motion is calculated.
在计算筒仓模型对地基简谐运动的动力响应时，研究了散体对仓体的作用及散体对仓体的减振作用。
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