在最小二乘反演中，加入体积因子以解决多解性问题，并提高了反演精度；
Using volume-gene in least-squares can ensure stability of iterative process and improve precision of inversion.
为了描述真实气体的混合性质，根据纯物质和混合物的压缩因子计算了压力混合效应和过剩体积。
For a description of the mixing behaviour the compressibility factors of the pure substances and of the mixtures were used to calculate the mixing effect of the pressure and the excess volume.
数值模拟结果表明：当自发发射因子较大时，对于不同的有源区体积，电流调制带宽显著不同。
The numerical simulation results show that the modulation bandwidths is obviously different by varying the active volume at an high spontaneous emission coupling ratio.
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