弹性散射

The schemes presented in the present paper can be used for solving general problems, and their basic ideas can be directly used for treating elastic scattering problems as well as for establishing schemes for velocity and density inversion.

所建立的数值计算方案具有普遍的适用性，其基本思想可以直接用于解决弹性波散射的数值模拟问题并用于反演密度和速度。

The influence of measurement geometry and ultrasonic source and receiver are analyzed to highlight their role in the estimation of elastic stiffness from scattering coefficients. Extrinsic properties, such as surface roughness, are briefly dealt with.

报告中分析了几何结构、超声波源以及接收体对检测的影响，强调了它们在弹性刚度、散射系数的评估中的作用，涉及了非固有特性的处理。

Thus, two kinds of intensity oscillations with phase difference of 180°can take place corresponding to the specular elastic diffraction and diffuse scattering.

因此在不同的观测条件下可出现二种相位差180°的强度振荡情形：镜向弹性衍射束强度振荡和漫散射束强度振荡。

Singular integral equation ; crack ; interface crack ; elastic wave scattering ; fracture dynamics

奇异积分方程；裂纹；界面裂纹；弹性波散射；断裂动力学

The influence of uncaptured electron on energy conversion efficiency in multiphoton nonlinear Compton scattering has been studied by using a particle theory and the inelastic collision model about electron and photon.

应用单粒子理论和电子与光子非弹性碰撞模型，研究了未被俘获电子对多光子非线性Compton散射能量转换效率的影响。

The energy conversion efficiency of the multi-photon nonlinear Compton scattering in the cone-shaped femto-second high power laser-plasma is given by using the inelastic collision model of relativistic electron and photon, and relativistic electricity theory.

应用相对论性电子与多光子集团非弹性碰撞模型和经典相对论电动力学理论，分析、计算了锥形飞秒强激光等离子体中多光子非线性Compton散射的能量转换。

The result for an aluminum sphere with gaussian pulse incident wave was compared to the theor y value obtained by inverse Fourier transform from the product of Rayleigh serie s with incident wave in the frequency domain, which shows a good agreement.

计算了高斯形脉冲入射下弹性铝球的无量纲反向散射声压，并和由频域的Rayleigh 简正级数解与入射波的频谱的乘积作反变换得到的精确解做了比较，两者趋势基本一致。

Except the something fortify, the complication of disturb in the dispersion of attenuation data are also graveness, so the evolvement of this area also becomes lentitude.

由于除介质粘弹性影响外，其它的干扰因素引起地表波的散射问题也很严重，使得这个领域的进展相对缓慢。

The scattering characteristics of plane acoustic waves by fluid-saturated porous cylinders are studied by using the Biot-Stoll's theory with consideration of loss factors, such as the viscosity of fluid and the nonelastic loss of solid skeleton.

依据Biot-Stoll的流体饱和多孔媒质声传播理论，考虑了流体粘滞和骨架非弹性损耗引起的衰减因素，研究了多孔圆柱体对平面声波的散射特性。

The scattering wave velocity potential to the flexible circle pile was the solution of the Laplace equation, which satisfied the cylindrical surface non-homogeneous boundary condition.

采用动力Winkler弹性地基梁模型模拟桩土动力的相互作用，通过求解满足柱面非齐次边界条件的Laplace方程，直接构造波浪对柔性桩的散射速度势，考虑了流体和桩体的相互作用，由解析法给出了埋置圆桩在波浪荷载下的动力响应。

I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援，我们正徵召国家所有各种的力量：我们的外交及发展，我们的经济力量与道德劝说，所以你们与其他军人不须要孤独地负起国家安全的责任。