Distribution of flow volume for unsteady mass flow in the straight pipe was analyzed and modeled by means of momentum balance and energy balance.

通过动量衡算及能量衡算方法分析并计算了直管内变质量流体流动的流量分配。

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Momentum balance equations were established for both x-direction and y-direction, by which bubble growth rate and departure diameter can be calculated.

进而获得了沸腾气泡的生长速率与脱离直径的计算方法。

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Based on momentum balance and the law of momentum conservation, two new graphic methods are developed to determine the pre-impact vehicle momentum or collision speed in this paper.

本文根据动量平衡和动量守恒定律的基本原理，提出了两种推算碰撞前汽车动量或碰撞速度的图解方法。

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This also works for teams- when we strive for momentum rather than balance or perfection, we continually move ahead.

FORBES: For Work-Life Happiness: Stop Balancing, Start Leaning In

So I propose an alternative to balance: Momentum.

FORBES: For Work-Life Happiness: Stop Balancing, Start Leaning In

Bush is likely to build on his August momentum and keep John Kerry off balance through sharp speeches and ads -- as well as through Congress.

CNN: Stay tuned for another swing in the campaign