Rigid body motion, surface errors, surface roughness, surface scattering and diffraction are mainly reasons which affect image quality of the X-ray imaging telescopes.

镜片刚体运动误差、表面误差、表面粗糙度、表面散射和衍射是影响X射线成像望远镜成像质量的主要因素。

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Because of wavelength of sound at low frequencies being close to the dimensions of small enclosures, scattering and diffraction in the course of sound radiation can not be ignored.

在小尺度封闭空间内，声波低频成分的波长与空间尺寸相当，声音在传播过程中所发生的散射、衍射等波动现象不容忽视。

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At this time the simulator does not implement surface travelling wave modelling and associated edge or gap backscatter modelling, or edge diffraction scattering effect modelling.

这次模拟器没有对表面行波、相邻边界和缝隙的反向散射，或者边缘绕射散射效应进行建模。

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