研究了一维粘性定态量子流体动力学（QHD）模型。
The viscous steady-state quantum hydrodynamic(QHD) model is analyzed.
该模型由有限个回归类构成，每个类的模型误差可以是正态的，也可以是满足一定条件的任意分布。
The model consists of a finite number of regression classes, for each of them the model error may normal or arbitrary under certain conditions.
用不同的近似法计算了单模染料激光色损失模型的光强定态几率分布函数。
The different approximation is applied to the laser system to calculate the stationary probability distribution of the colored loss noise model of Dye laser.
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