查询词典 perturbation function

The thesis then demonstrates from four aspects the decline of the big families reflected in the two works—the Compson\'s family and the Grierson\'s family, namely the financial decline of their plantation, the collapse of Puritanism, the perturbation of the white superiority concepts and the fall of traditional matrimonial concepts.

南方黑人奴仆不再信奉白人优越论及贵族世家高人一等的思想，即便白人本身也对白人至上的理念产生动摇。旧南方核心价值标志之一的南方淑女道德观也随着社会的变革而崩溃。来源：64d464ABC论文网www.abclunwen.com

The first half of this thesis reviews the heavy quark effective field the-ory and the heavy hadron chiral perturbation theory.

本文前半部分综述了重夸克有效场论以及重强子的手征微扰论。

In Chapter 2, an autonomous perturbation of a class of planar Hamiltonian systems with homoclinic orbits is discussed.

第二章讨论了一类含有同宿轨的平面Hamilton系统的自治扰动。

In many physical situations, the Hamiltonian of the system is composed of an unperturbed Hamiltonian and a perturbation.

在很多物理情况下，系统的哈密顿量由未扰动哈密顿量与扰动势两部分所组成。

In chapter 3, concentrating on the perturbation of Hamiltonian systems with parameters.

在第二章中，分析了系统E的奇点性态，研究了系统E中奇闭轨的存在条件，考虑了鞍点间的轨线连结，绘出了系统E的拓扑相图的分枝图和相应的全局相图。

Compared to perturbation method, the influences of many factors on voltage stability margin are considered and Hessian matrix of control parameters is not necessarily calculated. The method has high calculation speed and accuracy.

相对于摄动方法而言，该方法将各种因素对于电压稳定域的影响考虑在内，且不需要求取控制参数的海森矩阵，具有计算速度快、精度高的特点。

Axisymmetric nonlinear free vibrations of bimetallic shallow shells of revolution with uniformly distributed stationary temperature changes are investigated using the energy variational method and the homotopic perturbation method.

数值结果表明，变温对双层扁壳非线性振动的频率有明显的影响，而扁壳矢高可以改变振动的弹簧特性。

However, the solutions of the Cauchy problem of the nonlinear hyperbolic system generally develop singularities in finite time even if the initial data are small and smooth.For this reason, solutions must be found in the space of discontinuous functions. Therefore, one can not directly use the classical analytic techniques that predominate in the theory of partial differential equations of other types. Instead, we construct approximate solutions via the singular perturbation methods. By using the compactness of the approximate solutions, we can obtain the existence of the solutions of original system.

然而一般而言，即使是在初值很小且光滑的情况下，非线性双曲型守恒律的Cauchy问题的解在有限时间内也会出现奇异性，为此，我们必须在不连续函数空间中寻找上述问题的解，因此对这类问题的研究，我们也不可能直接利用在其它类型的偏微分方程中占主导地位的解析方法来解决问题，而是通过奇异扰动法构造近似解，由近似解的紧性得到原问题解的存在性。

Research suggests that the primary hypothalamic perturbation in the HPA axis in depression might consist of increased numbers of CRF-containing neurons and CRF mRNA in the paraventricular nucleus, which leads to hypersecretion of hypothalamic CRF.

一些研究提示，抑郁症患者HPA轴中下丘脑的原发性功能紊乱包括室旁核中CRF神经元和CRF mRNA数量的增加，这将导致下丘脑CRF的过度分泌。

In this paper, a high order accuracy difference method is presented for solving unsteady convection diffusion equation by using Implicit Perturbation Finite Difference scheme.

本文利用摄动差分思想，对定常对流扩散方程中的空间微商系数进行摄动展开，展开幂级数系数通过消去摄动格式修正微分方程的截断误差项求出，由此获得方程的隐式摄动差分格式，将此方法应用于非定常对流扩散方程，并加以修正，得到该方程的修正隐式摄动差分格式。

He has to relate with three women in the movie, and yet remain implicitly faithful to the unseen Lucinda.

让克劳德布里亚里成功地饰演试验了一个难度很大的角色：和三个女人打交道，但还要底下对观众未曾谋面的卢馨达保持忠诚。

The experiment was conducted to study effects of inulin on the growth performance, indices of immune organs and serum immunoglobulin of laying chicklings as well as the performance of inulin which replaced the antibiotics in diets by adding 0.2%, 0.4% and 0.8% of inulin, respectively.

试验旨在通过在蛋用雏鸡日粮中添加0.2%、0.4%和0.8%的菊粉，研究菊粉对蛋雏鸡生长性能、免疫器官指数和血清免疫球蛋白的影响，以及菊粉替代抗生素对蛋雏鸡的应用效果。