为了讨论混响对双基地声呐探测范围的影响，利用经验证的三维散射模型，讨论在不同入射、散射掠射角和散射方位角约束下的海底散射强度分布。
The distribution of sea-floor scattering strength held in the incident grazing angle, scattering graze angle, and scattering azimuthal angle was analyzed using a 3-D model that was validated.
粗骨料粒径分布对混凝土强度分析有重要影响，但如果不用切割方法，混凝土内粗骨料三维粒径分布测量就无法实现。
Coarse aggregate size distribution is important for the research on concrete strength analysis. Usually it can not be obtained without cutting a part of concrete down.
通过两种磁线圈电场强度三维分布的仿真，确定了磁刺激的效果和影响磁刺激聚焦性和深度的因素。
By 3 D simulation of the induced electric field of two kinds of coils, the effect of magnetic stimulation can be demonstrated and the factors influencing stimulating focality and depth are identified.
通过两种磁线圈电场强度三维分布的仿真，确定了磁刺激的效果和影响磁刺激聚焦性和深度的因素。
By 3 D simulation of the induced electric field of two kinds of coils, the effect of magnetic stimulation can be demonstrated and the factors influencing stimulating focality and depth are identified.
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