law of conservation of mass meaning in Chinese

质量守恒定律；质量不灭定律

Law of conservation of mass energy
质能守恒定律
Law of conservation of mass
质量守恒律
A mathematical model for the particles layering growth is developed based on the mechanism of layering growth and law of conservation of mass . a formula for calculating the particle diameter was also deduced
依据颗粒层式成长机理，根据物质守恒原理建立了颗粒层式生长的数学模型，提出了粒径长大的计算式。
When the author sets up the mathematics model with describing the process of two - dimensional debris flow , he develops the continuity equation by the law of conservation of mass and establishes the momentum equations by the law of conservation of momentum . the author makes full use of the advanced computer technologies , establishes the finite difference equation of numerical simulation by the differential operator fission method , and writes programs for computers which contact friendly with the other programs . the parameters are directly input on the keyboard
在泥石流堆积数值模拟方面,作者以前人工作成果为基础,在建立数学模型时,根据质量守恒原理,推导建立了泥石流连续性方程,根据动量守恒原理,推导建立了泥石流运动方程;在数值解法上,充分利用高速发展的计算机技术,采用算子分裂法建立数学模型的差分格式,开放式编制程序,人机对话方式设置参数,计算机程序具有通用性、可扩展性和易维护性。