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1·The model parameters are estimated by the optimal method of nonlinear programming, and the equivalent mixing coefficient is regressed in a dimensionless equation.

模型参数用非线性规划的最优化方法进行估计，得到了计算液相当量混合系数的无因次回归方程。

2·This paper describes the methods of fan testing and making fan property curve by dimensionless characteristic coefficient for the cooling fan of air-cooled engines.

论述了风冷发动机冷却风扇的试验法和用无因次特性系数法制取风扇特性曲线的方法。

3·The dimensionless average formation pseudo pressure is directly proportional to the dimensionless producing time if the influence of wellbore storage coefficient and skin factor is neglected.

在不考虑井筒储集系数和表皮系数影响的情况下，无量纲平均地层拟压力与无量纲生产时间成正比。

4·The dynamic compliance coefficient curves and the torsional Angle amplitude of a rigid disc versus the dimensionless frequency are presented.

文末数值算例给出了动力柔度系数和扭转角幅值随无量纲频率的变化曲线，并与单相弹性介质情况进行了对比分析。

5·The results show that, impulse and impulse coupling coefficient firstly increase and then decrease with the augment of the dimensionless factor when cone angle is fixed;

结果表明：当锥角固定时，冲量和冲量耦合系数随无量纲因子先增大后减小，极大值对应的无量纲因子仅与气体比热比相关；

6·The model of laminar flow in tubes in rolling motion is established. The dimensionless correlation of velocity is derived, and the correlation of frictional resistance coefficient is also obtained.

建立了摇摆条件下圆管内的层流流动模型，推导出无量纲化的速度表达式，得到摩擦阻力系数关系式。