查询词典 conservation law

Using the Conservation Law of mass, momentum, energy in the form of Euler and equation of the thermodynamics, the interaction between the shock wave and the wall surface of the excavation roadway during the gas explosion is discussed.

文章建立了瓦斯爆炸冲击波的管道物理模型，利用Euler形式的动量、质量、能量守恒方程和热力学方程从理论上解析了瓦斯爆炸过程中爆炸冲击波与掘进巷道壁面相互作用中正反射和斜反射时波阵面上的各个参数，并给出了计算公式和简化公式。

According to the point "some assumptions about steady state diffusion are valid when non steady state diffusion is studied"and carbon conservation law,the carbon contents' leaping condition is given.

按照"在研究非稳态扩散问题时，稳态扩散研究中的有些假定仍然是有效的"的观点，利用碳的守恒定律给出碳浓度的跳跃条件，结合扩散通量条件，推导结果发现这种内边界条件无法解决F／A界面上的迁移。

The last one is to study the relation between the discrect process and the iteration theory for some derivative equations(for example,equations with conservation law) and to make benefit analysis of methods.

结合具体问题的数值求解，探求迭代理论和实际离散方法的有机结合，研究算法的效益分析。

Using DRG,we solved the KPZequation satisfy conservation law and long-range spatial and long-timecorrelation,the roughen and dynamic exponent was found,the roughentransition was also discussed.

本文利用动力重整化群方法研究了具有长程空间相关和长程时间、空间相关条件下的满足守恒律的生长方程，得到了粗化和动力学标度指数，并讨论了长程时空相关对生长表面粗化的影响[36，34]。

Using mechanical energy conservation law,the simple pendulum period is analyzed and its exact formula is given.

利用三角函数作为一种近似方法，对单摆的动力学方程进行了简化，给出了大角度条件下单摆运动的周期的近似公式。

The simulative model of temperature field and stress field in concrete , Heat and moisture coupling、Parallel simulative calculation of concrete with water pipe cooling、 Parallel feedback analysis of thermal characteristic parameters, and stress intensity factor of induced joint, which are the sixty-four-dollar questions, are studied in this dissertation. The main contents of this dissertation are as follows:(1)Based on the past and current research work, the calculation theory of the transient temperature field and creep stress field of mass concrete which self temperature influence is considered is deduced. The couple effect between the temperature field and humidity field of concrete, is considered on the basis of conservation law of water and energy, and the coupled formulation which coefficient is not constant of the heat and moisture in concrete is deduced. The calculation theory and model which is theoretically strict for solution to thermal problem in concrete with water-cooling pipes are recommended.

本文主要针对混凝土的温度场应力场仿真计算模型、热湿耦合、水管冷却问题的并行仿真、混凝土温度参数并行反演分析以及诱导缝应力强度因子计算等混凝土大坝温度应力数值仿真的关键技术进行了较为深入的研究，全文主要内容如下：(1)在现有研究基础上，推导了考虑自身温度影响的混凝土非稳定温度场和徐变应力场的计算理论；基于水分质量守恒和能量守恒原理考虑混凝土温度场和湿度场的耦合作用，推导了混凝土的变系数热湿耦合方程，并建立了相应的计算模型；引用严密的水管冷却混凝土温度场的计算理论和计算模型，比较了两种简化计算方法用于水管冷却混凝土仿真计算的不足。

Philip Warburg of the Conservation Law Foundation says that the environmental impact would be far less than that of fossil fuels.

节源能源会的飞利浦华柏说，风能量对环境的影响远比矿物燃料来得少。

In Chapter 3 relaxation in growth with a conservation law is studied, and reduced roughness of the surface due to the effect of relaxation is found. The last chapter includes discussions of point defects in conservational surface growth.

第三章研究了守恒界面生长中界面弛豫效应的影响，发现弛豫作用使得守恒生长的界面粗糙程度下降；第四章研究了杂质点缺陷的存在对生长表面的影响，发现存在于生长的活跃表面层中的点缺陷会使表面的局域粗糙度增加。

The relation of the volumetric ratio ,reflectivity and transmissivity can be deduced by the conservation law of energy.

建立该复合材料热物性参数与纤维和基体热物性参数的关系理论模型。

They are consistent with those in breathers, demonstrating that the breather is actually a bounded pair of bright and dark solitons. Finally, we find the first conservation law should be modified by adding a phase.

最后，我们发现非零边值DNLSE的无穷多个守恒律中，第一个守恒律当亮孤子与暗孤子数目不相等时需要补上一个位相。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。