速度变化量

也就是说如果速度变化量和排气速度的比值为x，那么飞船的质量每增加1千克，我们就需要携带ex千克燃料。

If that ratio is x , then to launch a kilogram of ship , we need ex kilograms of fuel .

如果想要离开地球，那么速度变化量在垂直方向上至少需要每秒13千米，但排气速度最大也就约每秒4.5千米，因而所需燃料重量和飞船总重量之间的比值至少为e（13.5/4.5）≈20。

For leaving Earth , we need a of upward of 13 km / s , and is limited to about 4.5 km / s , which gives a fuel-to-ship ratio of at least .

以固体颗粒在加速过程中发生的动量传递为出发点，确定了相互发生动量交换的清水、固体颗粒的质量及其速度变化量，及影响其动量变化的外界因素。

This paper is mainly based on momentum transfer of solid particles during acceleration , and ascertains the qualities and velocities changes of water and solid particles with each other during momentum change , including outside factors influencing their momentum change .

通过推测地球的半径、质量和角速度的变化量，计算出地球各个时期的扁率。

The oblateness in each time can be calculated according to the conjectured change of the radius , the quality and the angular velocity .

临界折射纵波在每种材料中传播速度的变化量与材料中应力的改变量具有线性关系，但不同材料的应力常数存在一定的差别。

The velocity of the LCR wave traveling in each material had a linear relationship correspond to the stress . But the stress constants of different material present some differences .

通过潜山顶和内幕含缝洞的理论模型正演和波场特征分析表明，振幅和频率的变化量大于速度的变化量。

The change of amplitude and frequency is bigger than that of velocity by theoretical forward modeling and wave-field characteristic analysis of fractures-caves contained on top part and inner part of buried bill .

该方法在对准第1阶段采用速度加姿态变化量匹配方法，主要完成航向对准，同时初步进行水平对准；

In the first time transfer alignment it uses velocity matching plus attitude change matching and mainly performs azimuth alignment and primarily performs horizon alignment .

根据施药目标特征和机组行走速度的变化改变施药量可有效地节约农药和减轻农业生态环境对化学物质的负担。

Changing spray rate in terms of the variation of spray targets and machine speed may effectively save pesticide and reduce environment pollution .

轴向打滑速度一般200mm／h，在摩擦系数0.05～0.3的可控范围内，打滑速度变化量达到10mm／h以上。

Axial slid speed is general 200mm / h. When coefficient of friction is in available range of 0.05-0.3 , skid speeds variation is over 10mm / h.

第一次精对准利用H∞滤波估计速度快的这一优点，通过速度匹配进行水平对准，第二次精对准采用Kalman滤波通过速度加姿态变化量匹配进行航向对准。

In the first time alignment , H_ ∞ filter feature being taken advantage of , horizontal alignment was achieved by velocity match . In the second time alignment , Kalman filter being used , azimuth alignment was achieved by velocity plus attitude change match .