The math model of a single valve system is established on the basis of Newton's second law of motion and pressure dynamics.
本文在牛顿第二定律和压力动力学基础上建立了单气门系统的数学模型。
Turns out, some of these equations were very familiar: the law of conservation of momentum, and Newton's second law of motion.
其结果，其中一些方程非常眼熟，比如动量守恒定律和牛顿第二定律。
S. system. It is named for Isaac Newton, whose second law of motion describes the changes a force can produce in the motion of a body.
它以科学家牛顿的名字命名，牛顿的第二运动定律描述了力所能产生的物体运动状态的改变。
The motion of individual particles is obtained by solving Newtons second law of motion and gas flow by the Navier Stokes equation based on the concept of local average.
颗粒的运动满足牛顿第二定律，流体相的运动规律由局部平均的纳维斯托克斯方程求解，两相间的耦合由牛顿第三定律决定。
It follows from the principle of relativity that Newton's second law of motion although fundamental in classical mechanics only has an approximate and by no means complete validity.
由相对论原理可知，牛顿运动第二定律尽管是古典力学中的基本原理，但只是近似的，而决不是完全正确的。
It follows from the principle of relativity that Newton's second law of motion, although fundamental in classical mechanics, only has an approximate and by no means complete validity.
由相对论原理可知，牛顿运动第二定律尽管是古典力学中的基本原理，但只是近似的，而绝不是完全正确的。
So, what Kepler's second law says is that the motion of planets is, first of all, they move in a plane.
开普勒第二定律说到，首先每个行星的运动都保持在同一平面内。
That would that would give rise to a perpetual motion machine, breaking of the second law. It can't happen.
否则就会使，得永动机出现，打破第二定律那是不可能的。
On the basis of Newton's second Law, a motion differential equation has been put forward, by which a formula to calculating instantaneous velocity has been obtained.
依据牛顿第二定律列出运动微分方程序，解方程序并求得计算瞬时速度的公式。
The model of a kind of wave energy device moored on seabed is simplified into a spring-mass-damping system, and then its motion equation is built according to Newton's second law.
将造波水槽内二维浮体牵引弹簧回复液压缸的受力系统简化为弹簧—质量—阻尼器系统，建立数学模型，并根据牛顿第二定律得到运动方程式。
Such motion can be regarded as a small scale violation of the second law.
可把这种运动看作是轻度违反第二定律。
Such motion can be regarded as a small scale violation of the second law.
可把这种运动看作是轻度违反第二定律。
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