碰撞过程

本论文采用DEM和软球模型相结合的方法对风沙流中三维粒-床碰撞过程开展研究。

Combined with DEM and soft-model approach , this thesis focuses on the significant three dimensional grain / bed collision process in the wind-blown sand .

离散元法（DEM）是一种显式求解的，研究不连续体（离散体）力学行为的数值方法，它可以细致地模拟各离散单元的相互作用如模拟离散组合体的接触或碰撞过程。

Discrete element method ( DEM ) is a numerical method of studying mechanical behavior of the discontinuity ( discrete body ) by explicit solution , which can simulate the detailed interaction such as contact or collision process .

He~（2+）离子和H2，O2分子碰撞过程中电子俘获和靶激发的发射截面

Double-electron capture into excited states in collision between he ~ ( 2 + ) and h_2 , o_2

He~+离子和Ar原子碰撞过程中激发态的研究

Experimental studies of excited states in collisions between he ~ + and AR

简要评述了在pA碰撞过程中K±，η和ф介子的阈下产生及其对应的物理含义。

K ~ ±,η and ф meson productions at subthreshold energies in pA collisions are briefly reviewed .

Ar~+离子和He、Ne原子碰撞过程中的激发态和发射截面

Excited states and emission cross sections in collisions between ar + and he , ne

本文采用多体系统动力学中的R－W方法建立了用于模拟汽车碰撞过程中乘员运动学和动力学响应的三维人体模型；

A 3D occupant model for vehicle crash safety research is built by adopting the RW method of Multibody System Dynamics in this paper .

针对碰撞过程，提出了应用低成本CMOS阵列式成像传感器构建高速摄像系统。

A high-speed imaging system is constructed with a low-cost array of 16 CMOS imaging sensors that exist in a mainboard .

在ADAMS中对推弹碰撞过程进行了仿真分析，得出了不同推弹速度下的炮弹运动姿态及稳定时间。

Elastic collision in ADAMS to push the simulation analysis , leads to shells motion pose and stable time bomb speeds .

用蒙特卡罗法模拟电子在固体表面的弹性碰撞过程，得到电子的弹性反射系数ηE及弹性背散射电子的角分布。

Monte Carlo method was used simulating elastic collision of electron from solid surface , gained the electron elastic reflection coefficient η _E and the angular distribution of elastically backscattered electron .

在印度板块向欧亚大陆俯冲碰撞过程中，产生一系列深大断裂带，形成大量CO2释放脱气点。

There are come into being a series of deep seated fault zone and a great deal CO2 degasification point through the collision between Indian and Asian plates .

运用LS-DYNA对一艘初速度为2.5m/s的2600吨的油轮与某铁路钢筋混凝土连续梁桥下部结构的碰撞过程进行了仿真。

A collision between a 2600 DWT oil tanker and the substructure of one railway RC continuous beam bridge is simulated using LS-DYNA .

O~（3+）与氦原子碰撞过程的CTMC计算

CTMC calculation of O ~ ( 3 + ) + He impact processes

对考虑了共振电荷转移碰撞过程的二维AVLIS离子引出收集问题进行了数值模拟，分析结果表明：碰撞主要发生在鞘层中；

The 2 D ion collection process with charge exchange in AVLIS was simulated .

对B2＋离子和H原子的碰撞过程引入了一种新的近似方法－心核近似；以碰撞参数为变量给出了电子跃迁振幅，并得出了波恩近似的结果。

In this paper , core approximation is introduced into collisions of B2 + ions with H atoms , then electron transition amplituds is obtained by quoting impact parameter b and its first born transition amplitude is given .

弱场中Ba-Sr系统激光感生碰撞过程的理论研究

Theoretical Study of Ba-Sr Laser Induced Collisional Energy Transfer in Weak Field

氩原子参与的钠原子Energy-pooling碰撞过程

Energy-pool in g Collision Process of Atomic Sodium Assisted Argon Gas

对Ar~（2+）与Li，Na碰撞过程中由于单电子俘获而产生的Arll谱线进行了绝对测量，给出各谱线的发射截面数据。

Absolute measurements of emission cross sections have been performed for the lines from Arll excited states in Ar ~ ( 2 + ) + Li and Ar ~ ( 2 + ) + Na collision .

本文主要运用夸克交换模型计算所得的核子&χcJ离解截面研究Pb+Pb和S+Pb中心碰撞过程中强子物质中的χcJ抑制。

Nucleon - χ cJ dissociation cross sections obtained in the quark exchange mechanism are applied to study χ cJ suppression in hadronic matter created in central Pb + Pb and S + Pb collisions .

本文考虑了强磁场对碰撞过程的影响，用Bogoliubov方程来讨论强磁场中等离子体的输运过程。

A general kinetic equation for fully ionized plasma is derived from the Bogoliubov equation , taking account of the influence of magnetic field on the collision term .

在先前的一些工作中，发现对于每一个碰撞过程，为了产生最大的非对易效应，总存在一个最佳的碰撞能量（Eoc），并且随着非对易能标线性的变化。

In particular , it is found in previous work that for each collision process there is always exists an optimal collision energy Eoc for achieving the greatest NC correction , and varies linearly with NC scale ANC .

运用动力间隙元不仅能合理描述钻柱与井壁的接触碰撞过程，还能考虑井壁变形和泥饼的能量吸收，并用Newmark法求解钻柱动力学平衡方程。

This model is solved by dynamics gap element which can not only describe the contact and impact between drilling string and bore hole wall but also present the deformation of bore hole wall and energy absorption of mud cake . The dynamic equilibrium equation is solved by Newmark method .

对交通事故中汽车对汽车碰撞过程进行了研究，采用Visual-Basic编制了汽车碰撞前行驶速度测试软件，并再现了事故发生过程。

Automobile to automobile collision processing in the traffic accident has been studied in this paper . Visual-Basic editor has been adopted for the speed test software before the automobile collision and reproduce the process of accident .

高速碰撞过程中应变硬化材料靶动态响应研究

Study of the Dynamic Response of Strain-Hardening Target in High-Velocity Impact

研究了铀化合物的反应碰撞过程。

We have studied the reaction dynamics processes of uranium compounds .

另一方面，团簇碰撞过程是可逆的。

For the cluster collision , the collision process is reversible .

碰撞过程中碰撞力定量计算

The Quantitative Calculation of Impact in the Process of Collision

量子搜索与两体弹性碰撞过程的相似性

The similarity between quantum searching and course of two body elastic collision

离子原子碰撞过程中反冲离子飞行时间谱的蒙特卡罗模拟研究

Monte Carlo simulation of time-of-flight spectrum produced in ion-atom collisions

多刚体人体模型及碰撞过程仿真

A Rigid Multi-body Model and the Simulation on Impact Response