守恒

Exploring a new technology for snow-melting and deicing of airports tracks is the research background of this project. Through a great amount of experiments, numerical value calculation and theory analysis, a great deal of experiment data are attained, and the resonance law of carbon-fiber reinforced concrete under various power and ice-layer thickness conditions was found.A low-energy concuming, low cost and high thermal effect CFRC road surface concrete structurel material was developed. The snow-melting and deicing mechanism of CFRC was analyzed in the point of view of energy conservation, and the electric-thermal resonance law of road surface structural materials to CFRC concrete materials was set up.

本项目以新型机场跑道的冬季融雪化冰为研究背景，通过大量实验、数值计算与理论分析，获得了碳纤维增强机敏混凝土在不同功率、不同冰层厚度下的响应规律和大量试验数据，找到了一种能耗低、热效高、成本低的CFRC路面混凝土结构材料，并从能量守恒的角度分析了CFRC混凝土融雪化冰机理，建立了研究路面结构材料的导热性能对CRFC混凝土材料的电热响应规律。

The standard k-ε model, VOF multiphase flow model and porous zone model were adopted to simulate residual slag in a blast furnace hearth under different deadman conditions.

采用三维动量守恒方程、标准k-ε双方程模型、VOF多相流模型以及多孔介质模型模拟计算了不同死焦堆状态下炉缸内的渣滞留量。

In the thesis,the author systematically discusses the novel semi-inverse method ofestablishing GVPs or SGVPs in fluid mechanics,from 1-D unsteady flow to full 3-Dunsteady flow,from direct problems to hybrid ones.

应用该公式，对于任意用二个守恒型方程描述的流体问题，都可以非常方便地求得其广义变分原理，从而使得建立广义变分原理完全格式化了。

Then the writer gave a practical case of law of conservation of mass. The conclusion is that the learning mode of the new curriculum is useful not only in theory but also in practice, and it is popular with students.

然后，给出了&质量守恒定律&一节的教学方案，通过实施得出结论：新课程学习方式不仅在理论上是可行的，在实践上也是行得通的而且是深受学生欢迎的。

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。

This research reveals that dynamic action is the root reason for soil water-erosion, and that law of conservation of mass and energy is the basic principle of soil erosion, and that the coexistence of erosion and sediment is a universal rule of soilwater-erosion.

根据力学和物质与能量原理，对土壤水力侵蚀这一自然地理现象从哲学的高度进行分析，认为水动力作用是土壤水力侵蚀的根本原因；物质与能量守恒是土壤水力侵蚀的基本法则；侵蚀与沉积并存是土壤水力侵蚀的普遍规律。

The law of conservation of mass.

质量守恒定律。

According to Fick's law and principle of mass conservation, mass transfer model for convective airflow drying of alfalfa was established for forecasting moisture distribution inside alfalfa stem .

根据斐克定律和质量守恒原理，建立了可以预测干燥过程中苜蓿茎秆内部水分分布的常压热风干燥的传质数学模型。

The weight and percentage of plated metal of metallized fiber can be derived from measuring the weight and volume of metallized fiber via the density formula and the law of conservation of mass with konwing the density of plated metal and the basic fiber.

通过测定表面金属化纤维的质量和体积，利用密度公式和质量守恒定律，只需知道表面金属和基材纤维的密度即可推导出镀层金属的质量和表面金属化纤维的质量分数。

Law of conservation of matter and reason According to the law of conservation of matter and reason (law of conservation of mass and energy), matter cannot be created or destroyed, but is only to be found in transformation from one form to another.

物质不灭定律。&物质不灭定律&亦称&质能守恒定律&，一般表述为：物质不会凭空产生也不会消灭，只能从一种形式转变为另外的形式。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。