OK, so that's the velocity vector.
好，这就是速度矢量。
And so, that's called the velocity vector.
因此我们叫它速度矢量。
OK, that's what we call the velocity vector.
就是我们所说的速度矢量。
The speed is not changing, but the velocity vector is changing.
速率保持不变，但速度矢量会发生变化。
So, the velocity vector is going to be always tangent to the curve.
速度向量总是与曲线相切的。
The velocity vector shows a clockwise vortex rotation.
速度矢量表现出顺时针涡旋转动。
And, that's the plane that contains the origin, the point, and the velocity vector.
并且这个平面包含了原点和动点，以及速度矢量。
So, the velocity vector is the derivative of a position vector with respect to time.
速度向量，是位置向量关于时间的导数。
The metal flow rule of extrusion forming is expounded by velocity vector chart.
并利用速度矢量图阐述了挤压成形时金属的流动规律。
The extremity curve of the velocity vector at the contact point was also drawn up.
绘制了两齿面接触点处相对速度的速端曲线图。
The interface of core-annulus flow may be determined with the particle velocity vector fields.
采用速度矢量场的方法可以确定出环核结构分界。
The flow separation phenomena can be clearly observed from the computed velocity vector field.
从依据计算结果画出的全流场速度向量图能清楚地观察到流动的分离现象。
Speed is the magnitude of the velocity vector and the speed, therefore, always has a positive value.
速率是速度矢量的大小,因此速率一般，都是正值。
So, maybe if I actually stated directly that way, see, I'm just saying the velocity vector has a length and a direction.
也许我们可以这样理解，看，我说过速度矢量有模长和方向。
The velocity vector is introduced into the model describing target motion, which depicts the target moving more precisely.
将速度矢量引入到目标运动模型，从而能更好地描述机动目标。
This acceleration that is necessary to make the change in the velocity vector is always pointing towards the center of the circle.
要促使速度矢量，产生如此的变化，所需的加速度，总是指向圆心。
So, even if the speed is constant, that means, even if a length of the velocity vector stays the same, the velocity vector can still rotate.
因此即使速率不变，也就是说速度矢量的的大小不变，但它的方向可以做旋转。
The velocity vector distribution, pressure distribution and contours of volume fraction of air were predicted for an axisymmetric case.
计算了二维轴对称气穴流场的速度、压力及气体体积比分布。
So, the definition will take effect. The acceleration is as a vector, and the acceleration vector is just the derivative of a velocity vector.
有必要对加速度给出一个严格的定义，加速度,作为一个矢量,是速度的一阶导数。
So, if you just look at the position vector, and the velocity vector for any motion at any given time, then together, they determine some plane.
如果你看一下任何时刻运动时的，位置矢量和速度矢量，它们决定了某个平面。
Instantaneous center of rotation-velocity vector method is the integration of instantaneous center of rotation analysis and velocity vector method.
将瞬心分析与速度矢量法相结合的瞬心—速度矢量法较转化机构法更为清晰、明了、直观。
Objective to study the velocity, strain and strain rate of the carotid arterial wall motion using velocity vector imaging (VVI) in cerebral infarction patients.
目的应用速度向量成像(VVI)技术初步探讨脑梗死患者颈总动脉管壁短轴方向运动速度、应变及应变率的特点。
The acoustic radiation resistance matrix is combined with the velocity vector on a vibration surface to predict the total sound power radiated from the structure.
利用声辐射阻力矩阵和振动面上的速度矢量预报了结构声辐射的总功率。
Based on the analysis of typical post-stall maneuvers, steady linear flight, rapid pitching and rolling about velocity vector are presented as three typical basic movements.
对典型过失速机动的运动特性进行了分析，根据其运动特点将过失速机动的运动过程分解为定直飞行、快速俯仰和绕速度矢量旋转三种基本运动的组合。
In order to study the effect of non-uniformity of fluid motion on determination of the velocity vector at an interrogation spot, five typical non-uniform factors are discussed.
为了研究流体运动的不均匀性对于一个诊断区内速度矢量测量结果的影响，针对五种典型的不均匀性进行讨论。
The velocity vector and vortical contour in three different circumference positions were successfully acquired and the structure of the tip leakage vortex was clearly illustrated.
测量得到了三个不同周向位置下的涡量图和速度矢量图，并观测到了叶顶泄漏涡的涡旋结构。
This expression not only contains the term of dot product of velocity vector and temperature gradient, but also contains the dot product of velocity vector and the pressure gradient.
该式不仅含速度矢量与温度梯度矢量的点积项，还含有速度矢量与压力梯度矢量的点积项。
In the research of water hydraulic technology, flow field simulation is done by the method of Fluid-Solid coupling, leading to the pressure nephogram and velocity vector of the pump model.
在水压技术理论研究方面，应用流固耦合理论对水压齿轮泵进行了二维流场的仿真分析，得出了其流场压力云图和速度矢量图。
In the research of water hydraulic technology, flow field simulation is done by the method of Fluid-Solid coupling, leading to the pressure nephogram and velocity vector of the pump model.
在水压技术理论研究方面，应用流固耦合理论对水压齿轮泵进行了二维流场的仿真分析，得出了其流场压力云图和速度矢量图。
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