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We also develope the corresponding spherical harmonic-generalized Laguerre polynomial mixed spectral method and apply them successfully to computation of three dimensional problems, exterior problems and nonlinear problems.

在第二章中，我们提出了一类新的广义Laguerre多项式正交逼近，其特点是适用于更多问题并能更好地拟合微分方程真解在无穷远处的性态，从而提高了计算精度。

The University of Minnesota team, including collaborators Andriana Lehr and Andrew Oxenham, was able to independently manipulate both the harmonic frequency relations of the sounds and another quality known as beating.

明尼苏达大学的团队，包括合作者安德里亚娜莱尔和安德鲁奥克斯纳姆，能够独立操作的声音，另外两个谐振频率的关系质量称为跳动。

To make all of the original order harmonic colors be able to surface now business card printing and membership card making, first of all, the level curve right.

给使草稿上的所有阶和解色彩都不妨很好不天表示在制卡和会员卡制息品上，首先采取不不对的条理弧线。

To make all of the original order harmonic colors work well on the surface now printed matter, first choose the correct level curve.

要使原稿上的所有阶调和色彩都能够很好地表现在印刷品上，首先选用正确的层次曲线。

Transmission line is the most common element of power system and its harmonic model must consider the influences of the skin effect and the earth return path effect.

输电线路是电力系统最基本的电气元件，其谐波模型必须包含集肤效应、大地回流效应的影响。

In this project, we have mainly researched the complex-anlyticity,constancy and stability of pluriharmonic maps to complex grassmannian manifolds;the characterization and isotropicity of pluriharmonic maps with finite uniton number;the regularity, singularty and Liouville theorem of harmonic maps.

本课题着重研究到复Grassmann流形多重调和映照的复分析、常值性及稳定性之间的关系；具有有限uniton数的多重调和映照的特征与迷向性；调和映照的正则性、奇异性及Liouville定理。

In this paper, we discuss the 2-harmonic spacelike submanifolds in a locally symmetric and conformally flat pseudo-riemannian manifold and get two sufficient conditions under which Mn turns into a maximal submanifold,and the results in [2] are improved.

讨论局部对称共形平坦伪黎曼流形的2-调和类空子流形，得到这类子流形成为极大的二个充分条件，推广了文[2]中的结论。

Alternative Title, A Novel Design of the low-pass Filter in the Harmonic Detecting Method ...

Subject/Title，一种瞬时功率理论谐波检测的低通滤波器设计新方法。

Firstly, the function sinx that appears in the simple pendulum equation is replaced with a polynomial of degree 3 using Maclaurin series expansion and Chebyshev polynomial approximation. Subsequently, the resulting equation which is a Duffing type equation is approximately solved with combing Newton's method and the harmonic balance method.

首先，利用Maclaurin展开和Chebyshev多项式加速技术将单摆振动方程中的正弦型恢复力用三次多项式近似代替，得到一个Duffing型方程；然后，将牛顿法与谐波平衡法结合起来建立Duffing方程的解析逼近周期及周期解，从而给出单摆振动的解析逼近解。

Switching power amplifier of magnetic bearing worked in hard switching. To overcome drawbacks of large loss of switching and current harmonic distortion, a parallel resonant DC link soft-switching power amplifier was adopted in this paper.

为克服磁悬浮轴承开关功率放大器工作在硬开关状态时存在的开关损耗和电流纹波干扰严重的缺点，提出一种磁悬浮轴承并联谐振直流环节的软开关功率放大器电路。

Through comparing with the results by simulation to study the effects of theprojectile"s final velocity, the angle of rotation and the ballistic trajectory"s migration withdifferent projectile"s rotating speeds, different target"s moving speeds and differentpenetration angles.

通过比较数值模拟的结果来研究不同弹头转速、目标速度、侵彻角对侵彻过程中弹头最终速度、翻转角度和弹道偏移的影响。

I love stationery and all the accoutrement of writing.

我爱文具以及所有的书写的工具装备。