This paper presents a computer simulation model of the cardiovascular circulation system, which describes the blood flow dynamic law in the cardiovascular system by the state equation.

建立一种心血管循环系统的计算机仿真模型，即描述心血管循环系统内血流动力学变量变化规律的状态方程。

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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。

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According to the principle of conservation, differential equation which can describe airflow temperature distribution in state of turbulent flow in mine working face is deduced.

从守恒原理出发，导出了描述矿井回采工作面风流紊流流动和温度分布的微分方程。

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