热力学第一定律

It's the first principle of aerodynamics.

这是热力学第一定律。

In chapter four, in order to study the micro-process of the compress of the high speed oil-free twin screw compressor, a mathematical model is built based on the conservation of mass and the first principle of thermodynamics.

第四章为了深入研究无油双螺杆压缩机的微观工作过程，以质量守恒定律和热力学第一定律为基础，建立了双螺杆工作过程的数学模型。

This makes more and more people pay more attention to studies and applications of numerical simulation in thermal recovery. In this research, we have developed a reliable mathematical model for thermal recovery, which takes a full consideration of the effect of viscos, gravitical and capillary forces on the three-phase flow of gas, water and oil, the effect of the temperature on the medium characteristics of liquid and solid, the phase equilibrium of gas-liquid in each component, heat transportation including connection, conduction and radiation as well as heat losses in both the overburn and underlying strata. In the space discreation of the mathematical model, we have proposed a new method based on the improvement of the conventional nine-points difference approximation, which has a higher difference accurancy.

本项研究以热力采油的主要机理为基础，充分考虑在粘性力、重力和毛管力作用下油水气三相流动，考虑温度对各种流体和固体介质物性的影响，考虑每一组分中汽液两相的相平衡，考虑热在地层中的传导、对流和辐射以及上下盖层的热损失，利用热力学第一定律、质量守恒定律和流体迁移定律，建立了正确可靠的注蒸汽数学模型；在对数学模型进行空间离散时，利用控制有限体积积分法，对以往的九点差分近似作了合理的改进，使其具有较高的差分近似精度：结果表明，该公式的近似精度要比以往文献中所给的九点差分近似精度高，可以认为，在油藏数值模拟中，如果遇到非均质情况，使用这种九点差分近似更合理。

Week 9 Quantity of heat, work, internal energy in thermodynamics, first law of thermodynamics.

第9周 热力学的热量、功、内能；热力学第一定律及对理想气体等值过程的应用。

The first and second law of thermodynamics, as the universal rules in the nature, can be invoked to describe the energy dissipation.

热力学第一定律和第二定律作为自然界普遍适用的规律，能够用来描述能量耗散。

A relativistic transformation of generalized coordinates is discussed and it is found that the first law of thermodynamics and the equation of state of an ideal gas are invariant with respect to the relativistic transformation of generalized coordinates , so that the existence of relativistic transformation of generalized coordinates is reasonable.

讨论了一个涉及热力学的广义坐标的相对论变换，发现热力学第一定律和理想气体状态方程对广义坐标的相对论变换具有不变性，表明广义坐标的相对论变换有其存在的理由

Thermodynamic the first law is denotive it is macroscopical rule, it is energy is changed and conversation law is in the specific application inside thermodynamic limits.

热力学第一定律表示的是宏观规律，是能量转化和守恒定律在热力学范围内的具体应用。

When the heating/cooling load is of air condition type which can normally be produced by heat -pump devices, comparing with modern GTCC, they are not always energy -savable!

采用基于热力学第一定律的总热效率来判断热电冷联产系统的节能性往往会造成假象，只有用基于热力学第二定律的？

Based on the first law of thermodynamics and the law of mass conservation, a thermodynamic model of the back-pressure cavity has been developed by considering influence by back pressure cavity, compression chamber and oil supply system.

本文在热力学第一定律及质量守恒定律的基础上，建立了背压腔的热力模型，模型详细考虑了背压腔与工作容积、压缩机内油路之间的联系，并通过他们之间的联系给出了背压腔压力的计算方法。

Week 8 Application of first law of thermodynamics in course of equal value of ideal gas, cycle process, Carnot cycle, second law of thermodynamics, Carnot theorem.

第8周 热力学第一定律对理想气体等值过程的应用；循环过程、卡诺循环。热力学第二定律、卡诺定理。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷