Conservation of mass, second Newton's law, and momentum law are introduced into traffic flow to set up traffic continuity equation, Euler's equation, and momentum integral equation.
应用物理学中的质量守恒定律、牛顿第二定律、动量定律等，建立了交通流的连续性方程、欧拉方程和动量方程；
According to the law of conservation in the state of turbulent flow, the differential equation describing the airflow temperature distribution in drifting tunnel is derived.
根据紊流状态下的守恒原理，导出了描述掘进巷道风流紊流流动和温度分布的微分方程。
Based on the theory of gas percolation, law of mass conservation and hydrodynamics, basic mathematical equation of gas flow model was established.
依据瓦斯渗流理论、质量守恒定律和流体力学，建立了瓦斯流动数学模型的基本方程。
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