查询词典 anomalous scattering

In order to validate the correctness, the absolute differential cross sections of e-Ar scattering with multi-photon exchange in some special scattering geometries are calculated with Yukawa potential by applying the Second-order Born approximation and low-frequency approximation theory, respectively.

为了验证该计算方法的有效性，在入射电子的动量平行于激光场的极化方向这种特殊的散射模式下，利用Yukawa势，分别应用二阶玻恩近似方法和低频近似理论方法对激光场中电子—氩原子交换不同光子数的散射截面都进行了计算。

Basing on the view point of the α particle structure of the 12 c nucleus,the form factor and the transition form factor of the α particle in 12 c nucleus are as inputs,the inelastic scattering of pion-12c for 2+(4.43 mev) and 3-(9.64 mev) at tπ=150,180 mev are studied within glauber scattering theory.the calculated differential cross sections show better agreement with the experimental data.

从12c原子核的α粒子结构观点出发，应用12c原子核内α粒子的形状因子和跃迁形状因子，在glauber散射理论框架下，计算了共振区内能量为tπ=150，180 mev，π-12c的2+(4.43 mev)和3-(9.64 mev)非弹性散射微分截面。理论结果与实验较好8 t tt 8.c o m 地符合。

We fit the anisotropic interaction potential based on the Murrell-Sorbie potential function for He-HCl system by applying the interaction energy data, which are calculated at the theoretical level of the single and double excitation coupled-cluster method with noniteractive perturbation treatment of triple excitation CCSD. The new potential model is compared with other potential models. The differential scattering cross sections for collisions between He atoms and HCl molecules are calculated by using CC (Close-Coupling) method. Furthermore, the changing regularity of the inelastic differential scattering cross sections is summed up.

根据在CCSD/aug-cc-pVQZ理论水平下计算的He-HCl相互作用能数据，作者采用Murrell-Sorbie势函数形式拟合了He原子与HCl分子相互作用的各向异性势，并与其它势模型进行了比较；然后采用公认的精确度较高的CC近似方法计算了He-HCl碰撞体系的微分散射截面，总结了非弹性微分散射截面的变化规律。

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。

In this paper , using the DDA method, after calculating optical characteristics of the difformity aerosol particles, the author gets the relationships of extinction factor and absorption factor of aerosol particles with the changing incident wavelength, combining the Muller scattering matrix, the angular distribution of scattering intensity and polarizability of aerosol particles is given, which provides an efficient approach for the research of atmospheric radiation and transmission.

本文基于DDA方法，对不同形状气溶胶粒子的光学特性进行计算，得到气溶胶粒子的消光因子、吸收因子随波长变化的数值结果。结合Muller散射矩阵，给出了气溶胶粒子散射强度和极化度的角分布，为研究大气辐射传输提供了有效的方法。

Utilizing the developed electromagnetic scattering model for dihedral object, the scattering properties of manmade objects are predicted.

预测结果与外场试验分析得到的目标特性之间的一致性表明本文所建立的电磁模型是正确合理的。

The numerical algorithms of the direct acoustic scattering problem with the Dirichlet boundary condition is studied,which is the foundation of the inverse acoustic scattering problem.

数值求解Dirichlet边界条件下的声波障碍散射正问题，这是声波散射反问题的研究基础。

In this dissertation, the author discusses the numerical solution for the direct acoustic scattering problem with the Neumann boundary condition, and pays more attentions to discuss numerical recovering the shape of the obstacle region, which is the inverse problem of the direct acoustic scattering problem with the Dirichlet or impedance boundary condition.

本文重点研究了Neumann边界条价下的声波障碍散射正问题和Dirichlet、Impedance边界条件下的声波障碍散射区域反问题的数值计算方法，得到很好的理论结果和数值结果。

In this paper,regularization method is introduced. The author pays more attentions to investigate the numerical solution for the direct acoustic scattering problem with the Dirichlet boundary condition, and the numerical recovering the shape of the obstacle region which is the inverse problem of the direct acoustic scattering problem with the Dirichlet boundary condition.

本文主要引入正则化方法，研究了针对Dirichlet边界条件的声波障碍正散射问题和声波障碍散射反问题的数值计算方法，并得到了很好的数值结果。

Some factors are introduced,including the effects of temperature on transverse effective electric field and surface roughness scattering,the dependence of the saturation drift velocity of the electron on transverse effective electric field and temperature,and an improved interface trapped charge and fixed oxide charge coulomb scattering model.

在新模型中，引入了横向有效电场和表面粗糙散射的温度依赖性，电子饱和漂移速度与横向有效电场和温度的关系，以及改进的界面陷阱电荷和固定氧化物电荷库仑散射模型等因素。

But this is impossible, as long as it is engaging in a market economy, there are risks in any operation.

但是，这是不可能的，只要是搞市场经济，是有风险的任何行动。

We're on the same wavelength.

我们是同道中人。