查询词典 initial approximation

So the absolute differential cross sections of e-Ar scattering are calculated with some different potential models by applying the Second-order Born approximation theory, respectively.

接下来，利用二阶玻恩近似方法，计算了不同原子势模型下激光场中电子被氩原子散射的散射截面并与相关实验进行了比较。

On the basis of the frequency domain Born approximation theory of the scattering of two dimentional elastic waves, the time domain Born approximate solution to the scattering of elastic wave s with arbitrary frequencies is derived.

在二维弹性波散射频域Bron近似解的基础上，通过Fourier变换，推导了任意频率平面P波组合的脉冲波入射二维散射系统时，散射场的时域Born近似解。

Adiabatic surfaces are defined within the Born–Oppenheimer approximation by the energy of a given solution to the electronic Schrodinger equation at each geometry.

绝热势能面是在波恩-奥本海默近似的框架内定义的，指的是在每个几何构型下，电子薛定谔方程的本征值，即能量。

In chapter 5 a 2D inverse technique is presented, in which the distorted Born approximation is used to speed up the convergence and the preceding INMM is employed to achieve a high speed.

第五章介绍二维低频电磁问题反演方法。为了加速收敛，采用了变形Born近似。

Developed in 1990's, the distorted wave Born approximation methodwhich deal with the problem of three bodies of interaction in the collision betweenelectron and atom provide the theoretical criterion to calculate the tripledifferential cross section of the (e,2e) reaction.

二十世纪九十年代发展起来的处理电子—原子碰撞三体相互作用问题的畸变波玻恩近似方法，为计算原子的(e，2e)反应的三重微分截面提供了理论标准。

According to the theory of first-order Born approximation,a Fourier Domain Optical Coherence Tomography model of single scattering infinite narrow beam is established,and the reason why it is hard to obtain the exact solution of integrated scattering equation is analyzed.

选择多层介质作为样品，根据波恩一阶近似理论建立了单次散射的无限细直光束频域OCT模型，并分析了散射积分方程很难得到精确解的原因。

Fortunately, the problem of a weakly scattering object can be linearized by Born or Rytov approximation and thus resolved in Fourier domain with methods similar to those in X-CT.

利用Born或Rytov近似，可以将问题线性化，然后应用与X-CT类似的算法利用傅立叶变换对被测物体成象。

The stable wave-field propagators of one-way wave equation for Born and Rytov approximations are derived by using the local Born and local Rytov approximation methods in the scatter theory of wave-field propagation, and their application effects in prestack depth migration imaging of wave equation are compared theor...

利用波场传播散射理论中的局部Born近似和局部Rytov近似，分别导出了单程波方程的稳定的Born近似波场传播算子和稳定的Rytov近似波场传播算子，然后从理论和实践上比较了它们在地震数据波动方程叠前深度偏移成像中的应用效果。

Technical parameters and characters of sampling system determine that seismic wave amplitude recorded by seismograph is approximate relative amplitude. Using these data necessarily leads to serious distortion of inverse parameters. So using Born approximation can only obtain the location of interface even if the earth medium is little disturbance.

采集系统特性和技术指标决定了所记录的地震波振幅值为近似的相对振幅，用这样的相对振幅作为地震波参数反演的振幅真值依据，必然导致反演参数值的严重失真。

Three kinds of mass attenuation coefficient have been used, which are the monoenergetic MAC at the mean energy of the MC simulated spectrum, the effective MAC of the Born approximation formula spectrum and the effective MAC of the MC simulated spectrum.

在密度提取中使用了3种不同的吸收系数－MC谱光子平均能量对应的单能质量吸收系数、波恩近似公式谱有效质量吸收系数和MC谱有效质量吸收系数。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。