The repetition of the ultrasonic sound and the experiment of zero velocity in gas flowmeter are tested using this speed measurement system.
利用该测速系统，进行了超声波的重复性测试，以及在以空气为介质的零流实验。
Clearly, here the velocity is zero.
显然，这里的速度就是。
The angular velocity is zero when you release it and is a maximum when it goes through the lowest point.
角速度是,当你释放它的时候,当它到达最低点,速度达到最大。
Again, if I had changed the zero points you would have found the same values for the average velocity.
再强调一次，不管我这个0点选在哪里，这个平均速度的值，都是不会改变的。
The object starts out at t equals zero with a negative velocity.
物体从t=0时开始运动,其速度为负。
So if we now look at this plot we can search for The Times that the velocity is zero so you have to look for the derivative being zero.
我们观察一下这个图像，就可以找到，速度为0的时刻，因此只需要观察，导数为0的情况。
And at time zero, when it is there, it has a velocity in that ellipse.
时间为0时，在轨道上有速度。
Therefore, their velocity was zero, which clearly wounded the team's collective pride.
因此，他们没有取得任何进展，这明显的伤害了该团队的集体自豪感。
So the signs in the velocity and the signs in average acceleration depend crucially on how I have defined my increasing value of x not where I choose my zero points.
所以速度的符号,和平均加速度的符号,这二者都取决于,这里x正方向,是如何定义的,和0点的选取没有关系。
Well, before, the speed is zero and so the momentum is zero. And there comes the bang and one piece flies in this direction with a certain velocity, v2 prime.
在之前，速度为，动量也为0，现在砰响了一声，一片朝这个方向飞，它的速度为v2。
Now, I would think that it is reasonable to ask the following question: What is the average velocity, for instance, between time zero and time four?
现在，我认为,提出如下问题,是十分合理的：,比如说，平均速度是多少，在0到4秒之间？
So those are the times that the velocity is zero.
所以这些,就是速度为0的点。
That is the velocity at time zero, 0 and this is zero.
就是初始速度，而第二项是。
t2 In our case, t1 to t2 here 0 notice the velocity is zero as a start.
请看我们的例子里的t1和,请注意初始速度为。
Liquid velocity is near zero at the pipe wall and increases to maximum at the pipe center.
在管壁处液体速度近似为零，并在管中心处达到最大。
For the case of planar interception, the so called relative heading error angle between the relative velocity vector and the LoS (Line of Sight) is chosen as the output to be controlled to zero.
针对平面拦截问题，选择导弹和目标之间的相对速度矢量与导弹-目标视线之间的夹角（称为相对航向误差角）作为将要被控制到零的输出。
In order to keep the divergence of velocity being zero, a special treatment of divergence term in Poisson equation is proposed.
为使速度散度保持为零，在泊松方程中给速度散度一个特殊的处理。
Second, the free-boundary is handled by using combination of the zero-velocity method with the general ghost-image method and fourth-order difference format is used in free-boundary.
然后采用将零速度法和广义虚像法相结合的方法来处理自由边界，并在自由边界上采用四阶精度差分格式；
For the pulsar system which satisfies some conditions, we proved that the angular velocity of plasma and the charge density go to zero at the pole.
对于满足一定条件的脉冲星系统，证明了在极轴处的等离子体的角速度和电荷密度趋于零。
With the estimation of the zero drift of accelerometer, the precision of the vertical velocity and height can be improved and the measurement of the acceleration can be got without zero drift.
该滤波器能够有效滤除海浪杂波的干扰，获得高质量的高度信号和垂向速度信号。
When the velocity of the rigid wall is zero, these formulas degenerate to that for the interaction of air shock wave with static rigid wall.
当刚壁速度为零时，这些公式退化成空气冲击波遇固壁相互作用的计算公式。
The velocity at the stagnation points is zero .
在停滞点处，流速为零。
When the second derivative of the bubble number in unit bed volume with respect to gas velocity equals zero, the flow regime transition occurs. The model fits fairly well with the experimental data.
导出了当单位床层体积中气泡数目对气速的二阶导数为零时发生流型转变，该模型的计算机结果与实验数据吻合良好。
As the flow velocity is zero the results obtained correspond to the former conclusions.
当流速为零时所得的结果与以前的结论符合。
Based on a zero sideslip Angle proportional control, we get the gain of the distance from the centroid to the steering center position, yaw angular velocity and lateral acceleration.
在此基础上，得到车辆采用零侧偏角控制策略时，车辆转向中心到质心的距离，横摆角速度增益及侧向加速度增益的表达式。
These factors make the die exit pressure, normal velocity and shear rate not to be zero, thus lead to problems including die swell and etc.
这些影响因素使得口模出口处压力、法向速度和剪切速率均不为零，从而引发离模膨胀等问题。
Then, the expected orientation of spacecraft with zero angular velocity was derived with a new attitude parameterization and LQR controller was designed based on the linearized system.
利用一种新的姿态描述形式推导出了角速度为零时航天器的目标姿态，然后基于线性化后的系统设计了线性二次型最优控制器。
Then, the expected orientation of spacecraft with zero angular velocity was derived with a new attitude parameterization and LQR controller was designed based on the linearized system.
利用一种新的姿态描述形式推导出了角速度为零时航天器的目标姿态，然后基于线性化后的系统设计了线性二次型最优控制器。
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