查询词典 perturbation method

norm ; consistent perturbation ; linear equations

应用方面主要是讨论线性方程组解的界的估计。

In this paper, the JFO condition, satisfied with global mass continuity, is incorporated into an universal Reynolds equation with micro-polar fluid which is solved for the oil film pressure using OSM and FEM. The bearing load capacity and friction resistance were given, and stiffness/damping coefficients and critical rotor mass were obtained by solving a pressure perturbation equation with micro-polar lubricants.

本文采用满足全流场质量连续的JFO边界条件，采用微极性流体的广义雷诺方程来求解油膜压力分布，进而获得油膜承载力和粘性阻力等轴承动力特性量；采用小参数摄动法得出油膜压强扰动方程，并采用有限元法解出扰动压强，积分扰动压强获得油膜的阻尼系数和刚度系数，进而求得了表示轴承油膜稳定性的临界转子质量。

Chapter 5 concerns the number of limit cycles for a cubic Hamiltonian system under cubic perturbation.

第五章给出了只关于一个轴对称的三次哈密顿系统的分类，研究了三次哈密顿系统在三次扰动下的极限环的个数与分布。

Chapter 4 investigates the number and distributions of limit cycles for a class of Kukles system, which also can be regarded as a class of reduced Kukles system under cubic perturbation.

第四章研究了一类Kukles系统的极限环的个数与分布，这里我们把所研究系统看作是三次扰动下的退化的Kukles系统。

For instance, the perturbation may transform a strong detonation into a weak deflagration followed by a shock wave. This interesting phenomenon also appears in the numerical solutions in [58]. Our results give a reasonable explanation to this phenomenon.

例如，扰动会将一个强爆轰波变为一个波后为激波的弱爆燃波，这种现象亦出现在数值解[58]中，我们的结果为这种现象提供了一个理论的解释。

We also give two other kinds of further general- izations: one is to the case of hyperbolic-type degenerate lower dimensional tori in Hamiltonian systems, and the other one is to the case where the Hamiltonian has time-dependent quasi-periodic perturbation.

在第三章中，我们利用法向双曲不变流形理论和尤建功的一个定理的光滑性表述，给出了一个同时具有法向频率和法向分量的推广的KAM定理。

Because the slidingmode is designable and it is not concerned with the perturbation of theparameters of the structure and the varieties of the disturbance, thesliding mode is absolutely self-adaptive.

由于滑动模态可以设计而且它与控制对象的参数摄动以及外界的扰动无关，这使得滑模控制对外界扰动和系统内部参数的摄动具有完全的自适应性。

The circular polarization at the lower resonant frequency of the dual-frequency antenna can be achieved by setting a perturbation segment at an appropriate location in the patch element, and placing the feed point on the diagonal axis.

在较低的谐振频率处圆极化的获得是通过在天线辐射单元上适当地设置摄动元素，并将馈电点移到辐射单元的对角线上。

In chapter Ⅶ the perturbation theory on the optical ac Stark effect (see chapter Ⅳ) is applied to study the NMR spectroscopy in paramagnetic and diamagnetic systems.

在第七章，我们将第五章中应用于ESR系统的光移动的处理方法推广应用到NMR体系，探索研究了在激光场的作用下，顺磁体系和具有简并激发态的逆磁体系的NMR谱的变化，提出关于激光诱导的NMR频移的理论。

The resonant frequency fr was found to be indepen-dent of Am in the measured amplitude range. We considerthat the variation of fr with Ba is mainly contributed bythe diamagnetism of the specimen, and the motion of fluxlines in the specimen plays only a role of perturbation.

共振频率〓在振幅测量范围内未发现振幅效应，认为〓随磁场的变化主要是由于材料的抗磁性的贡献，内部的磁通线运动只起着一种微扰的作用。

You'll be in trouble it you don't watch out .

如果你不注意，你会有麻烦的。

Shaped like a biconvex lens.Of, relating to, or having the form of a hyperbola.

双曲线的属于双曲线的，与之有关的，或有双曲线形状的