如果181壳单元输入确定的壳截面类型，任何实常数定义将被忽略。
If a SHELL181 element references a valid shell section type, any real constant data specified will be ignored.
对于完全压实的地层，压实常数为1.0；未压实的地层，压实常数小于1.6。
The compaction constant is 1.0 for a completely compacted formation and less than 1.6 for an uncompacted formation.
微分散射截面的变化主要依赖于相对介电常数实部、虚部数值较大的一方，并且随粒子取向角的增大而增大。
The variation of DSCS depends on the larger part between real part and imaginary part of dielectric coefficient. The DSCS and azimuth angle are in proportional relation.
如果介电常数的虚部不等于零，则存在能量损失(不管实部为多少)，因而，可以认为该元件具备电阻性。
Finally, if the imaginary part of the permittivity is not equal to zero and so energy is lost (whatever the real part is), then the element can be thought of as having resistance.
如果介电常数的虚部不等于零，则存在能量损失(不管实部为多少)，因而，可以认为该元件具备电阻性。
Finally, if the imaginary part of the permittivity is not equal to zero and so energy is lost (whatever the real part is), then the element can be thought of as having resistance.
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