To improve the measurement accuracy of laser radar cross section (LRCS), the background scattering existing in the measurement is pointed out.
针对激光雷达散射截面的测量精度，指出测量中存在的背景散射问题。
Particles of energy E are scattered by a certain potential well. In finding the total scattering cross section, the physical background are often ignored.
能量为E的粒子被某一势阱散射，如果推求总散射截面常常易忽视物理背景。
The paper demonstrates the background to such solutions based on the ovoid or 'egg-shaped' cross-section sewers that have been used in Europe and the us for two centuries.
本文根据已经在欧洲与美国使用了两个世纪的卵形(也就是“蛋形”)截面的下水道说明采用这种方案的背景。
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