Based on the fact that a chirp radar signal has a strong coupling between time and velocity, a deceptive jamming technique with shift frequency is proposed.

本文基于线性调频脉压信号在时间和多卜勒频率间存在强耦合的事实，提出用移频干扰实现欺骗干扰的方法。

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The Global Positioning System enables properly equipped users to determine precise time and velocity and worldwide latitude, longitude and altitude to within a few meters.

GPS允许持有对应设备的用户来确定精确的时间、速度、经纬度以及海拔，而误差只有几米。

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Two dimensional image was obtained by transesophageal echocardiography. The thickness, wave time and velocity were showed during atrial septal motion by omni directional M mode echocardiography (OME).

应用经食管超声心动图获得二维图像，全方向M型超声显示并测量房间隔运动时的厚度、波幅时间及速度。

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It's very interesting because velocity seems to require two different times to define it -- the initial time and the final time.

这非常有趣,因为速度似乎需要两个时间才能算出来,初时刻和末时刻

耶鲁公开课 - 基础物理课程节选

That limit will be some arrow we can call the velocity at the time and it will always be tangent to the curve.

那个极限也就是一个矢量,我们称之为瞬时速度,并且它总是和轨迹相切的

耶鲁公开课 - 基础物理课程节选

What that means is, if you know the velocity of the given time and you know the initial velocity, you know what time it is.

这个方程的意义是,如果你知道某个给定时刻的速度,并且知道初速度,你就能知道运动的时间

耶鲁公开课 - 基础物理课程节选

This is arguably a fair way to handle community reviews -- weight reviews over time and look for velocity.

ENGADGET: This Is the Modem World: Review Sites Are Broken

One or more wearable motion trackers, connected to a smartphone, deliver real-time 3D joint angles, position and velocity.

ENGADGET: Xsens teases wearable 3D body sensors that won't cost, will track an arm and a leg (video)

For such a particle, it is possible to work out its velocity (from the time taken to pass between the two layers) and its trajectory (from the relative positions of the elements triggered in each sensor layer).

ECONOMIST: Orbital debris