引力粒子是高速运动的以太粒子，引力场的传播速度远远超过光速，牛顿的引力方程得到修正。
Gravitational particles are moving Ether particles in high-speed, the gravitational field spread much faster than the speed of light, Newton's gravitational equation was amended.
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。
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.
解牛顿运动方程的能量与动量守恒型积分方法。
Energy and momentum conserving integrators for Newtonian motion equations.
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