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The one primary goal of this paper is to provide a new method for simulation of acoustic and elastic wave propagation.

本论文分为两个层次，其一的目标是提出一个新的方法，用来研究并模拟声波和弹性波的传播。

According to acoustic wave equation, the property and propagation of SAW is expounded.

从声波方程出发，阐述了声表面波的基本性质和传播特性。

This transformation is particularly useful for the research on wave propagation in acoustic waveguide.

结果表明这种方法优于基于小波变换的降噪方法，特别是在低信噪比情况下。

Computer simulation is a very useful approach to predicting sound propagation and obtain acoustical information in design process.

室内声场计算机模拟为厅堂音质的设计和研究提供了新的方法。

It is a basic task of ocean acoustics to research the influence of ocean environment on sound propagation.

研究海洋环境对声传播的影响是海洋声学的基本任务之一。

Asymmetrical dynamic propagation problems under the action of variable loads and (P^3t/x^2) located at the origin of the coordinates respectively, are resolved by the measures of self-similar functions, and the universal expressions of analytical solutions to stresses, displacements and stress intensity factors are gained.

采用自相似函数的方法对坐标原点分别受到变载荷Px/t、Pt^3/x^2作用下的非对称动态扩展问题进行求解，获得了应力、位移和动态应力强度因子解析解的一般表达式。

In Chapter 7, attenuative Lamb wave propagation in adhesively bonded anisotropic composite plates is introduced.

第七章在粘接的各向异性复合材料中引入衰减的Lamb波。

The influence of advection on the propagation speed is also considered for both two cases.

当应用到一些生物种群和传染病模型中时，得到了许多有实际意义的结果。

The study of adventitious root formation is for the understanding andcontrolling of root development and vegetative propagation.

有关不定根形成机理的研究，是了解和控制根的发育和营养繁殖的基础性工作。

The attenuation law of the air shock wave during its propagation along drifts has also been discussed.

本文论述了井下发生沼气爆炸时空气冲击波的发生发展过程，以及空气冲击波沿井巷传播的衰减规律。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。