动量

TIAN Wen-sheng（Chaigoubu Teachers School,Zhangjiakou 076150,China）Abstract:Taking account of δr≠0,through the equation of conservation of orbital angular momentum,orbital parameters equations on the mass change are re-deduced.

Ba星系统的星风吸积及污染因子刘俊红和仲池田文生摘要：用整个系统的角动量守恒条件代替切向动量守恒条件，且δr≠0，考虑轨道偏心率的高次项，推导了星风吸积质量及轨道参量变化方程。

Further topics include kinematics, particle dynamics, motion relative to accelerated reference frames, work and energy, impulse and momentum, systems of particles and rigid body dynamics.

更进一步探讨运动学，质点动力学，于加速坐标系上之运动行为、功、能量、冲量、动量和质点系统与刚体动力学。

In order to understand the degree of simulation produced by exercise loads subjected to li zhu-hong during sub highland training to his body, and to grasp sub highland training patterns, the authors tracked and tested conventional uric indexes and some biochemical indexes of li zhu-hong at different training load stages during sub highland training, and revealed the following findings: different exercise loads and intensities have no significant effect on the number of red blood cells; training with high exercise intensities can increase the levels of serum urea nitrogen and creatine kinase, and significantly increase the percentages of testosterone and cortisol, which recovered their normal levels after exercising; there is no significant change in specific gravity of urine, acetone body, nitrite and white blood cells before and after exercise loads; the levels of urine protein, occult blood, bilirubin and urine bladder essence increase after exercising.

马拉松运动员李柱宏为了备战北京奥运会，在海拔1 750 m的兰州愉中亚高原进行了为期4周的针对性训练，为了解李柱宏在亚高原训练中运动负荷对机体的刺激程度，掌握亚高原运动训练的规律，对李柱宏在亚高原不同训练负荷阶段尿常规指标和部分生化指标进行了跟踪检测，结果发现：不同运动负荷和强度对红细胞数无显著影响，大运动量训练可使血清尿素氮和肌酸激酶水平升高，睾酮和皮质醇比例明显升高，运动后恢复正常；运动负荷前后尿比重、酮体、亚硝酸盐及白细胞无显著变化；运动后尿蛋白、隐血、胆红素、尿胆元水平上升。

It is found that the pressure wave generated by thermal expansion can affect the temperature field. It is suggested that this effect is caused by the adiabatic compression and expansion when pressure waves traverse the media.

通过分子动力学模拟考察了气态，液态和固态的氩在脉冲加热情况下的快速瞬态导热，观察了温度，压力，动量，密度等物理量的分布，以及动能在三个平动自由度上的分布。

It is assumed that it is adiabatic compression during start-up process before the atmophere pressure in flow passage rise to relief pressure, the thermodynamic equation, momentum equation and rigid water hammer theroy have been applied for the analysis and calculation the variation law of air during this transient process.

假设流道内气体未达虹吸驼峰顶处真空破坏阀排气压力前的起动过渡过程处于绝热压缩状态，运用能量方程结合动量方程和刚性水击理论，计算分析出了流道中的气体压力在起动过渡过程中的变化规律。

This book is attributed to a group of writers:Errors in the use of Auxiliary Verbs by Han Yufang,Adverb才and就by Zhou Qingming,Conjunction和by Han Xiaoping,Particle吗by Cui Fuying,Adverbial Adjuncts by Hu Zhiying,Complements of Frequency by Du Tonghui,Peng Zhiping,Li Xiuqing,Complements of Duration and跟…一样by Li Chengcai,Complex Sentences of Suppositional,Conditional,Causative and Adversative Relation by Dong Yuan,Rhetorical Question by Wang Xiuyun,and the rest by Li Zhu,Cheng Meizhen.

本书能愿动词误用由韩玉芳执笔；副词"才"和"就"由朱庆明执笔；连词"和"误用由韩孝平执笔；助词"吗"误用由崔福英执笔；状语误用由胡志英执笔；动量补语误用由杜同蕙、彭志平、李秀清执笔；时量补语和"跟……一样"误用由李成才执笔；假设、条件、因果和转折关系复句的误用由董原执笔；反诘句误用由王秀云执笔；其余的部分由李珠、程美珍执笔。

An aerodynamical urban canopy scheme is incorporated into the fine town boundary layer model. The scheme contains drag effect of urban buildings on flow and effect of building morphology on urban turbulent activity and momentum transfer.

文中将建筑物动力冠层方案引入到城市边界层精细模式中，该方案描叙了城市地区建筑物对气流的拖曳作用以及建筑物形态对城市地区湍流活动动量输送的影响。

Correspondent to the skewness of boundary layer mean flow, upward transfer of turbulent momentum in major part of CBL could occur over warmer surface, while there formed a major path for downward momentum transfer over cooler surface.

对应于平均流动场的畸变，地表较热区之上边界层大部可以出现动量向上输送的情况，较冷区成为大气动量下传的主要通道。

In this paper, coordinate and momentum eigenstates of two-particle have been introduced in the centre-of-mass system. New formalisms of two-mode squeeze operator and two-mode squeezed state have been given in coordinate and momentum pictures.

在质心坐标系下引入了双粒子坐标本征态和动量本征态，得到双模压缩算符和双模压缩态在坐标表像和动量表像中的新形式表示。

AMOC results reveal that S parameter of three lifetime components in oxygen are all bigger than that in nitrogen atmosphere. These are probably caused by the oxygen making the spin-conversion of positronium atoms.

结合正电子寿命-动量关联谱测量结果，本工作分析了不同气氛下多孔硅样品中电子偶素湮没寿命及动量变化关系，讨论了多孔硅中电子偶素的湮没机制以及气氛对孔径计算理论模型的影响。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。