弹性碰撞

Assumes that molecules are rigid ball, intermolecular End X are all elastic collision, in addition to the instant of collision, the molecular force can be ignored, then the chemical pure gas, K = 4nd2πkT = 4d2pπ, where: k for XmSkTSm Boltzmann constant, m is molecular weight, d the molecular diameter, n the molecular number density, p the gas pressure, T is thermodynamic temperature.

假定分子是刚性球，分子间完X全是弹性碰撞，除了碰撞瞬间外，分子力可以忽略，那么在化学纯的气体中，K＝4nd2πkT＝4d2pπ，式中：k为XmSkTSm玻耳兹曼常量，m为分子质量，d为分子直径，n为分子数密度，p为气体压强，T为热力学温度。

It can be concluded that, when only elastic impact is considered, the coefficient of restitution is determined by not only the material property of the target, but also the mass ratio of the colliding body to the target, and the boundary condition of the target.

结论如下：只考虑弹性碰撞时，恢复系数不仅与靶体的材料性质有关，还与碰撞物体质量比、靶体的支承条件有关，但与碰撞的初始速度无关。

For demonstrating about free fall、horizontal cast、stant cast、the conservation law of mechanical energy、the rule of collision、the formula of Centripetal-Force、simple periodic vibration and the vibration graph.etc.

能完成自由落体、平抛、斜抛、机械能守恒、弹性碰撞、完全非弹性碰撞、向心力、简谐振动、振动图象等高中力学实验。

Using the method we calculate the 〓 elasticdifferential scattering cross section, excitation differential scattering crosssection, and excitation cross section of electron collision with 〓 We transform the electron and molecule problem into electron problemby Born-Oppenheimer approximate. Mr Rossi, Dr. the Flinders University ofSouth Australia, calculated electron collision with molecule, but theexchange term he used become bigger and bigger as incident energyincreases, it is unreasonable, besides, the potential of electron and nucleus heused is somewhat rough. At present we correct these two terms. The potentialconsists of static potential, exchange potential, polarization potential.

电子与分子的碰撞过程的相互作用势主要是由静态势、交换势和极化势三部分决定的，这里对这三部分在动量空间中进行分波展开，推导出易于计算的表达形式，根据这些公式，并参考Rossi的弹性碰撞程序编写了计算电子与分子碰撞激发截面的程序，利用程序计算出势能矩阵元，通过求解Lippmann-Schwinger方程求得T矩阵元，便可求得散射截面。

Using the result about colliding time in elastic collision theory and the impulse formula explained the relationship between improvement effect and hammer quality, hammer dimension, modulus of elasticity of soil.

运用弹性碰撞理论中关于碰撞时间的计算结果及强夯过程的冲量公式，解释了强夯加固效果与夯锤质量、夯锤尺寸以及土的弹性模量之间的关系。

It is established that one close channel will be thought in the partial wave cross sections of elastic collision and rotational excitation. Five close channels must be considered in the partial wave cross sections of vibrational and rotational excitation at least.

结果表明：在研究氦氢碰撞体系的弹性碰撞、纯转动激发时，可以只考虑1个闭通道的影响，但在研究振转激发分波截面时，至少要考虑5个闭通道，才能得到比较准确的计算结果。

Elastic collision and inelastic collision are considered in oxygen molecule, nitrogen molecule by electron impart. The mail simulation results were as follow:(1)The variations of drift velocity and the average energy of electron with the E/N in O2 and N2 are obtained. The number of electrons for excitation, ionization, dissociation and dissociative ionization collision with the E/N and the energy of electron are analyzed emphatically.

考虑了各种弹性和非弹性碰撞过程，在纯氧气、纯氮气中，给出了不同简化场E／N条件下的电子漂移速度和平均电子能量的变化；着重分析了激发、电离、分解及分解电离碰撞的粒子数随E／N、电子能量的变化，同时计算了激发发射光谱的波长。

From the problem of the collision between small ball and homogeneous pole, the rules followed by different type of collisions are discussed, and the energy features of completely inelastic collision are summarized.

从小球与均质定轴杆的碰撞问题出发，讨论了不同类型碰撞所遵循的物理规律，总结了完全非弹性碰撞过程的能量特征。

The physical rule of the collision of a particle and a bar is discussed,the energy relation in completely inelastic collision is cleared,and it is turned out that the two bodies not necessarilly move together after completely inelastic collision .

讨论了小球与自由杆碰撞过程中所遵从的物理规律，明确了完全非弹性碰撞过程的能量特征，指出完全非弹性碰撞后两物体不一定粘在一起共同运动的事实。

The close coupling calculation of rotationally inelastic collision of He with Na_ 2 is first performed by employing a recently computed ab initio potential energy surface.

在已经拟合好的He-Na2体系势能面上，根据原子-双原子分子的非反应性碰撞动力学的相关基本理论，在空间固定坐标系下，采用严格的密耦方法求解了He原子和Na2分子的转动非弹性碰撞动力学方程。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。