When the piston is moved by vacuum, its velocity changes in steps, for the mass of piston pin and rod are connected in turn.

当活塞在真空作用下运动时，由于活塞销和连杆的质量是依次连接的，活塞速度呈阶梯式变化。

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The physical simulation results show that the fault below salt directly connected by hydrocarbon resource rocks and traps is the packing fault, in which gas migration velocity can get the top.

物理模拟结果表明：直接连接烃源岩和圈闭的盐下断裂是天然气运移效率相对较高的充注断裂，天然气在圈闭中聚集成藏取决于断裂组合输导模式。

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The numerical results show that the gear contact fatigue life is connected with gear rotational velocity.

数值计算结果表明：齿轮传动的接触疲劳寿命与齿轮转速戚息相关。

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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)

In the boxes connected to those you'll see from left to right, note number, velocity, and channel number.

ENGADGET: How-To Control Csound with a Custom Midi Controller: Hardware (2 of 2)