a problem worth noticing in the law of conservation of momentum

several different denoting ways of the law of conservation of momentum

动量守恒定律的几种不同表述方式

the energy equation consists of ( a) energy transfer of an electron beam which excites the whistler waves, and ( b) energy transfer of whistler waves, which are described by conservation principle of wave action density.

能量方程包含：（a）激起哨声波的电子束能量转移，（b）用波作用密度守恒原理描述的哨声波能量转移。

through a careful and fundamental study of the building energy conservation principle and its relationship with the welfare improvement, and the economic incentives associated with the design of policies, the essay tries to promote energy-saving construction and propose practical advices.

本文通过深入探讨建筑节能的外部性原理及其福利改进的影响，提出了相关的经济激励政策与设计思路，为推动我国建筑节能工作的开展提供建议。

based on the assumption mode method, the lagrange equation and the momentum conservation principle, the paper derived the dynamics model of a free-floating flexible dual-arm space robot that holds a rigid payload in a horizontal workspace.

本文基于假设模态法、La-grange方程和动量守恒原理，推导了一种自由浮动柔性双臂空间机器人协调操作刚性负载闭链系统的动力学模型。

based on the conservation principle of linear and angular momentum, the method derives the equations of the mass and mass center as well as inertia tensor of the new end-effector for the manipulator handling the unknown object.

该方法基于线动量和角动量守恒定律，推出了机械臂负载未知目标的新的末端效应器的质量、质心和转动惯量的方程组。

based on the total mass conservation principle of calcium element in a desulfurization agent before and after a reaction, the authors have proposed a novel method for analyzing a calcium-based gas-solid desulfurization reaction-calcium balance method.

基于脱硫剂反应前后钙元素总量守恒的原理，提出了一个分析钙基气固脱硫反应的新方法-钙平衡法。

for the purpose of controlling the temperature of pemfc stacks effectively, a dynamic thermal management model of pemfc stacks has been developed on the basis of the energy conservation principle.

为了实现质子交换膜燃料电池电堆温度的有效控制，根据电堆能量守恒原理建立了电堆动态热管理模型。

the conservation principle of orbital symmetry may be represented as conservation law of bond symmetry, by means of group theory and the point of view of the localized bonds.

利用群论的方法及定域键的观点可以把轨道对称守恒原理表述为键对称守恒规律。

according to the conservation principle of mass and heat, through long-term observation of the water in different recharge sources, the sources and proportion of pit water can be determined.

根据质量和热量守恒原理，通过对不同补给水源进行长期观察，可确定矿坑水的补给源及其比例。

and then, a method by which a fuzzy variable can be transformed into its equivalent normal random variable is put forward, and the method follows the entropy conservation principle.

提出以模糊变量的名义随机变量的均值作为该模糊变量等价正态随机变量的均值；证明了所得模糊变量的等价正态随机转换方法能够严格遵循熵守恒原则。

by establishing the mathematical model of air flow, this paper introduces air dynamic theory and energy conservation principle of natural ventilation in the long and narrow sewer tunnel in winter.

阐述了山岭排污隧洞外界自然风引起洞内空气流动的原因，以及隧洞内空气流动能量守恒理论，并建立了空气流动的数学模型。

based on the mass conservation principle, the production formula of semi-spherical flow for pseudo-pressure, pressure-squared and pressure are derived in this paper.

本文基于半球形流的特点，利用质量守恒原理，通过推导得到了由拟压力、压力平方和压力一次方表示的产量公式。

based on energy conservation principle, mechanical models of immediate roof in different stage have been established, the stability criterion of immediate roof has been derived.

基于能量守恒原理，建立了二次沿空留巷不同阶段直接顶的力学模型，推导出沿空留巷直接顶的稳定性判据。

by aid of structural damp theory, the integral damping ratio of the composite structures which include two different materials are derived according to energy conservation principle.

从结构阻尼理论出发，根据能量守恒原理，推导了由钢筋混凝土和钢结构组成的组合高耸结构的整体阻尼比。

based on the energy conservation principle and the paraxial ray tracing method, the peacock eye zone plates are designed and encoded.

基于能量守恒原理，利用追迹法、计算机编码设计了用作长焦深元件的孔雀眼波带片。

according to the momentum conservation principle, we obtained the dynamic equations of the system which is linearly dependent on a group of inertial parameters.

根据系统动量守恒关系，得到了与系统惯性参数呈线性关系的系统动力学方程。

the relationship between the fracture mechanics parameters k_c and k_ ( ic) basing on the energy conservation principle

基于能量原理的断裂力学参数K c与K（IC）之关系

based on the information conservation principle, the federated kalman filtering algorithm was deduced and its optimization was demonstrated.

基于信息守恒原则，推导出联邦kalman滤波算法并完成最优性证明。

the equation of a spacecraft with solar arrays are obtained by using the conservation principle of momentum.

利用动量矩守恒原理导出带太阳阵航天器的动力方程，指出了系统的非完整约束性质。

based on the phase transition theory and the energy conservation principle, the expression of frozen ratio is derived.

基于水–冰相变理论和能量守恒原理，得出冻结率表达式。