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To further improve frequency convener s performance,perfect phase-controlled theory and reduce voltage wave-shape s harmonic component,based on cosine interpenetration law the paper presents symmetry cosine law to better trigger points.

为了进一步改善变频器的性能，完善相控理论，减少输出电压波形的谐波成份，在余弦交截法的基础上，提出了用对称余弦法对触发点进行优化。

The other is the difference of the original wind and the harmonic part, which is the solution of Poisson equation with homogeneous boundary condition and can be expanded into double Fourierism cosine series.

第一部分是Laplace方程在给定边界条件下的解，由于Laplace方程的解是调和函数，这个部分可称为调和部分，又因为其与区域内部值无关，也称外部部分。

A counter example of an arbitrary number of independent nucleons in the anisotropic harmonic oscillator potential at the equilibrium deformation has been also given.

也给出了一个相反的例子，即在各向异性谐振子势中处于稳定形变的任意数目的独立核子。

Then, combined with spherical-harmonic spread formula and Tscherning/Rapp experiential covariance function, a new covariance function estimation method is created, whose configuration capability is tested and analyzed.

第七章概括了本文研究的主要内容，结合似大地水准面精化的要求和本文研究内容，介绍了本文力求解决的关键问题，并简要阐述了似大地水准面精化的未来发展趋势。

Based on theory of simple harmonic oscillation in physics,this paper presents a novel model for production decline prediction given by deformation of critical damping oscillation equation which is predigest.

基于物理学中的简谐振动原理，提出了把阻尼振动方程中的临界阻尼振动方程变形得到一种新的产量递减模型，可简化为Arps指数递减形式，经实例计算，可以用来预测油田产量，以此指导油田开发和管理。

Based on theory of simple harmonic oscillation in physics, this paper presents a novel model for production decline prediction given by deformation of critical damping oscillation equation which is predigested to Arps exponential decline form.

基于物理学中的简谐振动原理，提出了把阻尼振动方程中的临界阻尼振动方程变形得到一种新的产量递减模型，可简化为Arps指数递减形式，经实例计算，可以用来预测油田产量，以此指导油田开发和管理。

Based on the method of modal analysis, it can be concluded that ANSYS has directive values to dynamic simulation and structural optimization of crossbeam, and the research has laid a foundation for the harmonic response analysis of the next step.

通过模态分析法，可以看出ANSYS对横梁的动态仿真和结构优化有一定的指导意义，也为下一步的谐响应分析提供依据。

The effect on amplitude of EXAFS from harmonic caused by high order diffraction of crystal monochromator is discussed.

本文讨论了晶体单色器高次衍射形成的谐波对EXAFS振幅的影响。

In order to apply the methods of the harmonic retrieval and the noise filtering based on the cumulant being used widely to the real data processing, these methods should be studied further.

并指出了大量理论研究所广泛采用的累量自身、基于累量的谐波恢复方法和基于累量的滤噪方法在实际应用过程中的缺陷以及进一步研究的意义。

A 2D harmonic model based on the quaternion was constructed,and a special four-order cumulant was defined.

构造了合适的基于四元数的二维谐波模型，根据此模型定义了特殊的四阶累积量切片，分析了加性高斯在有色噪声中的二维三次非线性相位耦合。

This matter overthrew all basises I learned from Sunday school .

这件事把我从周日学校学到的所有道理都颠覆了。

It's one of the cruel ironies of aging: if you want to remember your favorite restaurants, the less you should eat at them.

这是一个老化的残酷讽刺：如果你想记住你最喜欢的餐馆，你应该更少吃到它们。