The image reconstruction problem of linearattenuation coefficients is very difficult and central in transmission TGS.
在TGS透射测量中，线性衰减系数值的图像重建问题是TGS的难点和核心问题。
2
The average electron density in linearattenuation zone is about 10 ~ (-5) of neutral particle density, and can overcast wider area.
平缓衰减区中的平均电子密度约为中性分子密度的十万分之一，并且可以覆盖较大范围。
3
Objective; To compare the dependence of signal attenuation on temperature and time caused by the diffusion movements in inhomogeneous and linear gradient magnetic field.