数值计算

In this paper, the squeezing effects of the radiation field in the two- photon process with twolevel atomic mixed- state are studied by means of the time - evolution operator method and numerical calculation.

该文采用时间演化算符方法和数值计算，研究了相干光场与混合态二能级原子相互作用双光子过程中辐射场的压缩效应。

Finally, by means of time evolution operator and numerical calculations, the time evolution of the atomic population, the atomic dipole squeezing, the time evolution of the squeezing and coherence properties of the light in the system of the two identical two-level entangled atoms interacting with the coherent optical field have been studied.

论文的第三部分工作是采用时间演化算符和数值计算方法，研究了两全同二能级纠缠原子与相干态光场相互作用过程中，原子布居、原子偶极压缩、光场的二阶相干和光场压缩性质的时间演化特性。

In the paper,the atom"s occupancy and squeezing effects with atom transition are studied by meansof the time-evolution operator method and numerical calculation. The dependence ofthese properties on atom"s initial state phase and optical fields average photonnumber is also discussed.

本文采用时间演化算符方法和数值计算研究原子在经历跃变前后原子布居数和压缩的变化行为，并讨论它们对原子初态和光场初态参量的依赖关系。

We did so by representing the results of a series of numerical experiments on a one-dimensional model hydrogen atom.

本文将采用数值计算法来求解含时Schrodinger方程，研究在一维氢原子模型中，外加的平行静电场，不同形状的激光脉冲以及原子处于不同初始态对谐波谱线和电离率的影响。

With the same parameters, the numerical solution is in good agreement with the finite-element simulation.

在同样的参数情况下，用ANSYS模拟的结果和数值计算的结果吻合的较好。

In the dissertation, shaking table tests and numerical calculation method were adopted to study the rules of dynamic soil-structure interaction under seismic loads.

本文采用振动台模型试验和数值计算方法研究了地震荷载下高层建筑结构—地基动力相互作用的有关规律，并探讨了地基土液化对桩基高层建筑地震反应的影响。

It gets the numerical value of every point one by one.

它的特点是逐点进行完整的数值计算。

It is difficult to solve it by traditional mathematic and mechanical methods, so the numerical value analysis is used.

经典的数学方法和力学方法对大多数接触问题都难以解决，需用数值计算方法来进行分析。

Stability is one of the most important conditions in which we numerically solve the wave equations.

稳定性是数值计算波动方程的最重要条件之一。

It is concluded that the oscillation of the solutions predicted numerically is physical oscillation.

本课题的研究还表明，数值计算预测出来的解的振荡是物理上的振荡。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新