initial yield surface

基本解释

The proposed model can take into account the initial anisotropy by introducing anisotropic tensor and shape parameter based on yield surface of MCC.
该模型具有以下特点：其一，在修正剑桥模型屈服面中引入各向异性张量和形状参数，边界面形状灵活又可以反映初始各向异性的影响；
If the burst is shallow enough to penetrate the surface, blast, thermal, and initial nuclear radiation effects will be present, but will be less than for a surface burst of comparable yield.
如果离地面够浅以致能穿透表面，那么将出现冲击波、热辐射以及早期核辐射作用，但是作用效果要小于近似当量的地面爆炸。