数值分析

Based on the numerical simulation results of airdrop landing, the stress of frame was analyzed.

根据数值仿真结果，分析了该特种车车架的受力情况，提出了一些相应的改进措施，从而为车架的实际优化提供了依据。

Based on the numerical simulation re-sults of airdrop landing, the stress of frame was analyzed. Some defects of design were found and a number ofcorresponding modifications were proposed.

根据数值仿真结果，分析了该特种车车架的受力情况，提出了一些相应的改进措施，从而为车架的实际优化提供了依据。

Three cold airstream snowstorm processes happened in Dec. in 2005 have been analysed and simulated by WRF model.

对2005年12月发生在山东半岛北部威海地区的三次冷流暴雪过程进行了分析研究，用WRF模式进行了数值模拟。

With the algebraic result in form of piecewise function expressions, the excitation and propagation processes of stress waves, including the longitudinal wave, the transverse wave, and Rayleigh-wave, are discussed in detail.

基于该分段函数形式的代数结果，纵波、横波、Rayleigh波等应力波成分在弹性表面的激发和传播过程得到详尽分析，其中很多结论是已有的解析积分结果或者数值计算结果不曾得到的。

To speed up the convergence rate of the iterative algor...

用所提出的耦合算法分析算例，得到的结果与有限元法、边界元法和另一种耦合算法的数值计算结果一致，验证了这种算法的正确性和可行性。

The physical model of polarizing beam coupling and splitting system using altazimuth coude telescope is built up based on Mueller matrix and Stokes vector. The phenomena of the decreasing of the receiving efficiency are successfully explained by this model. Three dynamic phase compensation solutions are proposed: 1 Two quarter-wave plates are rotated to compensate the phase of the laser.

针对这个问题，建立了地平式折轴望远镜的共孔径偏振耦合分光模型，用Stokes矢量和Mueller矩阵分析了在望远镜旋转过程中激光偏振态的变化，数值模拟计算了望远镜处于不同方位角和天顶角时的偏振耦合分光效率，解释了实验中观察到的望远镜旋转导致偏振耦合分光效率退化的现象。

Based on the second- and fourth-order compact difference formulas for second-order derivatives and the idea of weighted average, two classes of the alternating direction implicit method are proposed for solving two-dimensional wave equation. The methods are of accuracy O (T^2+h^4) and O (T^4+h^4) respectively. Stability conditions are obtained by Fourier analysis method.

基于二阶微商的四阶紧致差商逼近公式及加权平均思想，提出了数值求解二维波动方程的2种精度分别为O(т^2+h^4)和O(т^4+h^4)的交替方向隐式格式，以及与其相匹配的第一个时间层的同阶离散格式，并且通过Foulier方法分析了格式的稳定性。

Furthermore, we constructed group explicit method, alternating group explicit method and alternating section explicit-implicit method. The last two methods are unconditionally stable. The numerical results show that our methods have good accuracy.

分析表明，通过格式在不同时间层的交替，如分组显式方法、交替分组显式方法、交替分段显-隐方法，后两种方法是绝对稳定的，而且数值试验表明计算精度较好。

In this paper we proposed a modified filter method for stable analytic continuation.

本文作者给出了一种修正滤子方法，进行了一些理论分析和数值模拟。

Evolvement of plate wave in level was studied by using both analytic geometry and FEM .

用几何分析和数值模拟相结合的方法，研究了具有横向浪形的中厚板在矫直过程中的演化。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。