The motion is only in the x-axis, along the x direction.

只在x轴，沿着x轴的方向进行移动。

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The application principle of the motion controller in X, Y numerical servo platform was discussed.

阐述了该运动控制器在X、Y两轴数控伺服工作台中的应用原理。

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Objective To establish 3D coronary artery motion tracking by the images of double plane X-ray projection and 3D CT volume sequence.

目的利用双平面X射线投影图像序列和参考CT容积图像进行冠状动脉的三维运动跟踪建模。

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For example, suppose you use vertical motion and you use y instead of x; and a would be g or -g; that's a particle falling down under the affect of gravity.

例如,假设在竖直运动中,你用 y 来代替 x,那么 a 就是 g 或者 -g,这就是一个受重力作用下落的质点

耶鲁公开课 - 基础物理课程节选

The J1 offers a few unique slow motion modes as well, though, including a bizarrely wide 8:3 (think 16:6, not 16:9) slow motion mode that snaps up to five seconds of 640 x 240-pixel video at 400 fps, played back at 29.97 fps.

ENGADGET: Nikon 1 J1 review (video) Hands-on

Xsens has supplied 3D body motion tracking technology for Hollywood productions such as Ted, John Carter, X-Men, The Avengers and many more.

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

Representatives from ESPN tell us that a native 720p 60 3D signal performs better during fast motion, which is something we'll see during the Derby and Summer X-Games.

ENGADGET: ESPN 3D officially launches with FIFA World Cup coverage: live from Bristol