查询词典 wave propagation

In this paper, the dynamic behaviours of polymer-cement composite material are investigated, including the dynamic rigidity, internal frication and ratio of elastic energy to unelastic energy in hysteresis loop under vibration, the stress wave propagation and attenuation in this material, the impact toughness and abrasiveness.

本文研究了聚合物水泥复合材料的动力性能，其中包括动力刚度、振动状态下的内耗及振动滞后曲线中的弹性与非弹性应变能之比、应力波的传播与衰耗、冲击韧性和耐磨硬度等。

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。

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。

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 computation of two-dimensional advection transport using current methods such as Alternating Direction Implicit Method and linear interpolation technique can be subject to numerical attenuation,parasite oscillation and poor reproduction of wave propagation when large time steps are used.

在概化的平面区域内，采用上述方法模拟了二维初始浓度高斯分布和水流激波在旋转速度场及均匀速度场上的对流输移问题，结果表明方法在优化幅值衰减和数值扰动以及计算效率方面具有相当的发展潜力和应用前景

After graduation, he continued to work at the same institute, engaged in the research of shock wave propagation in solids, hyper-velocity impact and shock wave consolidation. He obtained PhD in applied mechanics from the University of Cambridge in 1998 with a thesis about constitutive relations and elastic waves for cellular solids modeled as a micropolar solid.

毕业后继续在力学所从事高温高压下固体中冲击波传播、高速冲击及爆炸冲击波压实金属粉末的机理研究。1998年获英国剑桥大学应用力学博士学位，论文研究胞状固体材料本构关系及微极材料中弹性波传播的问题。

The formulas of the statistical average radius of wave-front circle edge dislocations had been developed for the coaxes beams that had different beam diamantes and crossbeams in the cases that the averaging time was shorter t

标 签 激光传输波前位错短期平均大气湍流高斯谢尔光束 Laser propagation Wave front Dislocations Short-term averaging Atmospheric turbulence Gaussian-Shell beam

After the deduction of high order temporal and special difference approximation to the wave equation, the snapshots of wave propagation in an infinite monoclinic media and synthetic three components surface and VSP data for a flat layered model are presented.

推导了交错网格中时间和空间上的高阶差分近似公式，并针对二维单斜各向异性介质，给出了具体的空间差分网格的形式。在上述理论的基础上，利用交错网格高阶有限差分技术，首次对单斜各向异性介质中波的传播特性进行了模拟。

According to the guided wave technique, the displacement of guided wave propagation at an arbitrary time and point on the surface of a pipe is described.

在导波传播理论和频散波形预测理论的基础上，研究了超声导波在检测管道时，如何利用时域波形重构缺陷图像的问题。

By three-dimensional linear standing wave,the wave propagation over a bar of scheldt flume experiment carried at Delft hydraulics and tidal current field simulation of waters of between Denmark and Sweden etc example,the model is verified to have advantages such as stability, high efficiency etc,and proved suitable for the simulation both water body of large range and long period.

最后通过三维线性驻波、Delft水力学中Scheldt水槽实验的周期性入射波通过淹没潜堤的传播问题以及连接丹麦和瑞典间海域的潮流场模拟等算例，从多方面验证了模型具有稳定、实用、高效、灵活等的优点，不但能对短波问题进行精确成功的模拟，而且也适合对大范围的水体进行长时段的模拟。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。