动量的

Based on the quality, momentum, and energy conservation laws and the state equation, considering the momentum loss of gas column flowing and the complicated thermal conduction mechanism in the bore-hole and formation, the pressure and temperature calculating method is derived for single-phase gas flow in different positions of the bore-hole.

文章以质量、动量和能量三大守恒方程和状态方程为基础，考虑了流动气柱的动能损失以及井筒和地层中复杂的传热机理，推导出计算单相气流在井筒不同部位压力和温度的方法。

In this paper, it includes several parts as follows: Based on the conservation laws of mass and momentum equilibrium in transient liquid pipe flow, the basic equations are introduced in detail.

本文主要从以下几个方面进行了研究：从连续介质理论的质量守恒和动量守恒原理出发，介绍液体管道瞬变分析的基本方程组即波动方程组的详细推导过程。

Based development of physics history,We explain the development of momentum conservation in the physics and it is universality in nature.

本文根据物理学的发展历史，说明了动量守恒概念的发展及其在自然界中的普适性。

The bland sameness of space is at the root of both momentum conservation and angular-momentum conservation.

平淡无奇的空间一致性，既是动量守恒的根本，又是角动量守恒的根本。

On the basis of momentum conservation this paper focuses on the study of flow mechanism of the header and its flow static pressure distribution.

本文在动量守恒的基础上，研究汇流集箱的流动机理和集箱流体静压分析，锅炉汇流集箱流动的基本规律和设计参数。

On the basis of Navier-Stoks equation and continuity equation, the SOLA-VOF method was adapted to calculate the field of velocity and pressure in fluid in this program. According to the inertia and continuity of fluid, a new velocity boundary conditions of free surface for 3dimensional fluid flow simulation had been developed. By the new method, any velocity condition occupied on the free surface of the fliud flow could be treated reasonably.

以流体的动量守恒方程和连续性方程为基础，采用SOLA-VOF方法，结合首次提出的流体惯性原理与连续性原理相结合的自由表面速度边界条件处理方法，研制出了流场数值模拟程序。

At first, the structure and algorithms of BP network are deeply researched,the ralations between momentum factor and convergence speed、convergence accuracy are revealed and a kind of improved BP algorithm is presented.

首先重点对BP网络的结构和学习算法进行了深入研究，揭示了动量因子与网络收敛速度、收敛精度之间的关系，并提出了一种改进的算法。

In the geometry space, azimuthal anisotropy and coplanarity of sec- ondaries in the families are reproduced by normal model. However in the momentum space, the anisotropy of showers in the data is less than the both perditions of our two Monte-Carlo models.

共面结构事例在几何空间分布的各向异性性质可以用现有理论完全解释，但是实验族在横动量空间的各向异性程度明显小于两个不同模型的预言，其原因还有待进一步研究。

The model takes into account the flow and physical property characteristics of the systems as well as geometric variables such as corrugation angle.

根据质量和动量守恒原理，考虑下降液膜和气相的相互作用、系统内气液两相流动、物性特征以及填料结构参数对压降的影响，提出了填料塔内规整填料的压降模型。

Aiming at bottom roof caving and support impact problems induced with abrupt large scale caving upper roof in face 21303 of Daliuta mine, this paper put forward the motion parameter at roof caving and calculation formula of roof shear breaking force with the help of theorem of momentum, theorem of moment of momentum and D' Alembert principle. Roof caving process was simulated by Ansys Ls-DYNA program, and maxim impact force was got. The theoretical research outcomes in the paper were applied in face 21303 of Daliuta mine, and were accordant with actual observing status of roof caving process.

针对神东煤炭公司大柳塔煤矿活井21303综采工作面，上层采空区顶板突然大规模垮落对下层顶板及支架的突然冲击问题，文章采用动量定理、动量矩定理、达朗伯原理推出了顶板垮落瞬间的运动量及顶板切顶垮落所需要的剪力值计算公式，用ANSYS LS-DYNA程序对顶板垮落过程进行了数值计算，得到了最大冲击力，在大柳塔煤矿活井21303综采工作面对顶板垮落特征进行了实际观测和理论成果验证。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。