通过动量、能量和质量衡算的方法可以建立其基本的计算式。
The basic calculation will be defined on the basis of dynamic momentum, energy and mass equilibrium accounting.
根据质量衡算原理，建立了基于微分床萃取的超临界流体萃取的动力学数学模型，从理论上分析了超临界流体萃取的传质过程。
According to the principle of mass conservation, the kinetic model of SCFE is set up founded on differential extraction, and the mass transfer in SCFE is analyzed.
通过动量衡算及能量衡算方法分析并计算了直管内变质量流体流动的流量分配。
Distribution of flow volume for unsteady mass flow in the straight pipe was analyzed and modeled by means of momentum balance and energy balance.
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