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Based on the nonlinear dynamical equation of product packaging system,the shock spectra and the damage boundary curve of tangent nonlinear packaging system under the action of half-sinusoid pulse are obtained using a numerical method,and the influence of various factors on shock response is discussed.

采用数值求解单自由度产品包装系统的非线性动力学方程，得到了半正弦波冲击下正切型非线性包装系统的冲击谱曲线和边界破损曲线，讨论了相关参数对它们的影响

This thesis uses the boundary element numerical simulation method do some research.

本文应用边界元这种数值模拟方法作了以下研究。

The boundary element method is applied to find a numerical model on 2-D orifice in this paper.

本文利用边界元法建立了一个求解二维孔口的数学模型。

In this paper,Numerical calculation study was based on the boundary element method.

以边界元方法为基础，对腐蚀电场仿真模型进行了推导和计算。

The deflection and moment wavelet parameters for common boundary conditions of beams were obtained from numerical features of interval boundary of BSWI functions.

根据BSWI函数区间边界的数值特征，得到了梁常见边界条件下的挠度和弯矩小波系数值。

A new kind of numerical method, the boundary point method , is used to calculate the magnetic field.

第五章将新型计算方法——边界点方法引入电磁场的计算。

In performing the numerical analysis of unsteady seepage problem, it is necessary to calculate the integral on free surface boundary.

在三维非恒定渗流有限元计算中，不可避免地需计算自由面上的边界积分项。

A new efficient method of numerical iteration solution to the boundary value problem was put forward.

结合航天飞机和飞马火箭的制导律，进行了制导技术的开发，提出了一种新的基于该控制律的火箭真空段运动的多变量边值问题的有效数值迭代解法。

The numerical results of second- and third-order boundary value problems are presented to demonstrate the effectiveness and accuracy of proposed method.

二阶和三阶间断边值问题的数值算例验证了本文方法的有效性和计算精度。

A "time-dependent relaxation" method is proposed to accurately implement given photospheric footpoint displacements and force-free conditions. The method is applied to analyzing the energy buildup of coronal magnetic fields, and the numerical results confirm the Aly conjecture (the magnetic energy of the force-free field is bounded above by the fully-open field energy), and extends it from fully-open to partially-open force-free fields.

提出计算无力磁场的"时变松弛"方法，能精确实现光球足点位移和无力条件；采用该方法分析日冕磁场的剪切储能，验证了Aly猜想（无力场磁能以全开放场磁能为上限），并将该猜想由全开放无力场推广至部分开放无力场。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。