speed increment meaning in English

速度增长
速度增量

Using the ipga and setting the terminal speed increment of the upper stage and the manufacture cost of cpkm as objective functions , the rocket motor are processed dual - objective optimization design that has six design parameters
采用ipga算法，以该运载火箭上面级末速度增量最大及cpkm发动机的制造成本最低作为目标函数，对该发动机进行了双目标优化设计。
With the speed increment , not only 1 / 2x and 2 / 3x frequency component appear in low frequency segment , but also 4 / 3x frequency component begin to appear in high frequency segment . the amplitude of fraction frequency is usually larger than that of multiple frequencies . the nonlinear characteristic of torsion for rubbing rotor is similar with that of flexural vibration completely
研究结果证实了扭振特征和非线性特性用于该类故障诊断的可行性：从发生碰摩起，扭振分频和倍频相伴出现，转速较低时， 1 / 2x成分突出，随着转速升高，不但有1 / 3x及2 / 3x分量出现，而且出现了4 / 3x成分，分频幅值大于工频及倍频；弯振和扭振的非线性运动特性完全相似，扭振有抑制转子系统复杂运动的能力。