弹性散射

Codes for estimation of phase velocity and attenuation was written based on the expressions proposed by Gelinsky and others.

在非均匀介质中，阻抗的起伏会导致多孔弹性散射，介质各层压缩系数的变化会引起层内流动。

In order to achieve the required angular resolution, a sophisticated tracking detection system was established to reconstruct the track of each incident particle, as well as each scatted particle. The upstream detection system consisted of two plastic scintillators (T1 and T2) and two low-pressure multiwire proportional chambers .

He是结构性质比较典型的丰中子核，也是RIBLL可以产生的束流强度较大的放射性核素。2001年3月，我们利用兰州近代物理研究所的放射性次级束流线装置提供的25MeV/n的〓He轰击〓Be和〓Li靶，进行了〓He+〓Be的准弹性散射的研究。

And M.Hirai are introduced. The parton distributions function of bound nucleon are obtained through the experimental data of deep inelastic scatting and Drell-Yan process.

Hirai等利用不依赖于物理模型的整体分析，通过拟合现有轻子—原子核深度非弹性散射以及高能质子—原子核碰撞核Drell-Yan过程实验数据，分别得到了束缚核子中的部分子分布函数。

The diagnostic of DT fuel plasma areal density in the direct-driven implosion experiments on SG-Ⅱ laser facility has been performed by measuring the number of recoil D and T produced by 14MeV neutron′s scattering. The particles of recoil D and T were detected by CR39 solid-state nuclear track detector.

在神光Ⅱ基频光直接驱动内爆实验中，利用CR39径迹探测器测量了DT靶丸释放出的 14MeV中子弹性散射后逃逸出燃料的反冲D核和反冲T核的数量，实现了激光聚变实验中燃料面密度〈ρR〉的诊断。

In this paper, based on the tight-binding Su-Schrieffer-Heeger model and by using a nonadiabatic molecular dynamic method, we investigated some unclear problems of polymers in details, such as polaron dynamic properties in different systems, the inelastic scattering processes of oppositely charged polarons driven by an external electric field,and the influence of electron-electron interactions on the dynamics of a charge polaron in conjugated polymers.

本论文基于一维紧束缚的Su-Schrieffer-Heeger模型，采用非绝热的分子动力学的方法，针对高分子聚合物中一些尚未清楚的问题，如极化子在不同体系中的动力学性质、正负极化子的非弹性散射过程，以及电子-电子相互作用对极化子动力学性质的影响等问题进行了较详细的研究。

We find that the scattering process of the charge and lattice defect is different under different strengths of electric field and the interchain coupling interactions.(1) The results of the dynamics of oppositely charged polarons in polymer chains show that:①At a weak field (.1 mV/A), they finally scatter into an entity, which will be dissociated as a pair of neutral solitons after their first collision and separation.

1聚合物中极化子对的非弹性散射对电场强度的依赖关系表明：在弱场(小于0.1mV/A)时，电荷由于量子隧穿相互抵消，但不改变符号，极化子晶格碰撞后带着剩余的电荷返回，但是它们不能分得很远，在电场作用下，可进行第二次碰撞，结合成一个整体，然后又分成一对中性的孤子对。

The electron dephasing time is a time scale that how long an electron can stay at its eigenstate.

电子非弹性散射时间是一个度量电子处在其基态时间长短的物理量。

Moreover, the merging into these quantum Hall states with decreasing temperature appears to deviate from a semicircle relation. This could be due to the fact that the presence of inelastic scatterings (electron-phonon, electron-electron, etc.) is known to affect the localization effect.

此外，随著温度降低，分析结果显出温度流线并入量子霍尔态的行为偏离了预期的半圆关系，此可能由於非弹性散射(电子-声子、电子-电子等)的存在对局域效应造成影响。

Transmitted electrons were finally detected by a channeltron electron multiplier operating in single-pulse mode instead of usual measuring current intensity, which can reduce the acceptance solid angle and the contribution of elastic scattering in the forward direction can be minimized effectively.

因采用了恒温控制作用室，以便较准确测量反应室的绝对气压值；同时采用静电型圆柱能量分析器，并用计数率测量模式代替通常的束流强度测量模式，从而可以大幅度减小接收立体角，抑制零度角的弹性散射贡献。

"Compton effect: Change in wavelength of X rays and other energetic forms of electromagnetic radiation when they collide with electrons. It is a principal way in which radiant energy is absorbed by matter,"

康普顿效应：电子对X射线和其它高能电磁辐射的弹性散射引起波长增大的现象；这是物质吸收辐射能的一种主要方式。

He knows that he's one of the mostdominant players in the NBA right now.

我知道他现在是联盟里最有统治力的球员之一了。

Using analysis method of BCG , the dissertation analyzed the management of voluntary service organizations .

利用BCG分析方法对我国的志愿服务组织管理进行了分析。