通过对流体的局部、瞬时守恒方程进行系综平均，得到了双流体模型的基本方程。
The basic equations of two-fluid model have been developed byapplying ensemble averaging to the local instantaneous conservation equations.
利用系综平均的方法，计算了在单峰高斯分布适应面上准物种的浓度分布和误差阈。
By ensemble average method, the concentration distribution and error threshold of quasispecies on single peak Gaussian distributed fitness landscapes were evaluated.
得到了在光纤中传输的脉冲光功率的系综平均值和输出脉冲宽度的均方根值的近似解析公式。
Formulas are derived for the ensemble average of the pulse power and the RMS pulse width.
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