在此基础上，引进了微分熵。
从热力学第二定理出发，利用外微分构造了熵、焓以及吉布斯函数的表达式。
Expressions of entropy, enthalpy and Gibbs function are formulated by exterior differential derived from second law of thermodynamics.
首先列出了描述生长变形体能量平衡的微分方程以及熵不等式；
Firstly, the differential equations for describing the energy equilibrium of growing deformable body and the entropy inequality were discussed briefly.
在分析热力学熵的基础上，构造了道路交通系统的类热力学熵，揭示了道路交通系统类热力学熵产生的内部机制，并通过熵理论建立了系统状态变化的微分方程。
On the basis of the analysis of the thermodynamics entropy, the thermodynamics entropy of the road traffic system is built up, and the mechanism of the entropy producing is revealed.
在分析热力学熵的基础上，构造了道路交通系统的类热力学熵，揭示了道路交通系统类热力学熵产生的内部机制，并通过熵理论建立了系统状态变化的微分方程。
On the basis of the analysis of the thermodynamics entropy, the thermodynamics entropy of the road traffic system is built up, and the mechanism of the entropy producing is revealed.
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