查询词典 perturbation parameter

In this paper,We use the singular perturbation theory and method to study the two types of singular perturbation problems with fractional derivative.

本文应用奇异摄动理论和方法研究了含有分数阶导数的两类奇异摄动问题。

As special cases, the perturbation Ritz method and perturbation Galerkin method have been structured for s...

作为本方法的特例，提出摄动里兹法及摄动伽辽金法，并用它们处理了两个实例。

The effect of upper tropospheric perturbation PV on the development of the South-West Meso-cyclogenesis is discussed on Hoskins PV Principle in terms of conservation of PV on isobaric surface and humid isentropic PV.Upper tropospheric perturbation PV,which dilates slantwise downward and southward,is found to be an important factor to influence the low-level South-West Mesocyclone.

基于Hoskins位涡理论思想从等压面位涡守恒和湿等熵位涡守恒的角度来研究对流层高层位涡扰动对低层西南涡的发生发展影响，发现对流层高层位涡扰动是影响西南涡发生发展的重要因素，它对西南涡的影响表现出它有向南向下倾斜伸展的特点。

In this paper, a high order accuracy difference method is presented for solving unsteady convection diffusion equation by using Implicit Perturbation Finite Difference scheme. Firstly, we use the steady convection diffusion equation, the constant coefficients of this equation are expanded to power series of grid-spacings, then the high-order Perturbation Finite Difference scheme is obtained by determining the coefficients of the power series. Put this scheme on unsteady convection diffusion equations and modified it, the IPFD scheme is constructed.

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。

Specifically, there are three kinds:(1) constant variation method to track two-body problem the root number of variables to establish perturbed equation;(2) coordinate perturbation method in order to track objects in real position and the location of an intermediate orbit perturbation differential equation as a variable to establish;(3) transformation theory, through a series of canonical transformation to reduce the order of the equations of motion to make it a more simple form.

具体做法有三种：（1）常数变异法，以二体问题轨道根数为变量建立摄动方程；（2）坐标摄动法，以天体在实际轨道上的位置与某一中间轨道上的位置差作为变量建立摄动方程；（3）变换理论，通过一系列正则变换，降低运动方程的阶数，使其具有更简单的形式。

The optimization problem with linear inequalities can be solved by Quadratic Programming. The simulation results show that the design improves the dynamic performance and suppress torsional vibration causing by rolling perturbation. The model predictive control suppresses rolling perturbation.

仿真结果表明，采用具有约束条件的预测控制策略的控制系统对轧机传动系统的控制效果在动态性能和抑制扭振效果上明显优于传统PI控制，可以较好的抑制轧制扰动对传动系统产生的影响，对解决轧制扰动鲁棒性控制问题是一种有效的解决办法。

This paper details the basic idea and main point of perturbation method in slo-ving complex mathematical problem, in which the characteristics of perturbation method are put stress on.

本文简要说明了摄动法在求解复杂数学问题中的基本思想和要点，着重分析摄动法在求解泡沫塑料气泡膨胀数学模型中的应用。

In this chapter the model of minimal perturbation constraints nonlinear programming is established, and the concept of the minimal perturbation efficient solution is introduced.

在研究模型中的较多约束集的结构表示的基础上，给出了较多约束最优解要满足的Fritz John条件和Kuhn-Tucker条件。

This paper introduces the concept of minimal perturbation efficient solution in minimal perturbation constraints programming.

文中引进了极小扰动约束规划的极小扰动有效解概念。

Secondly, the effectiveness and limitation of the classical perturbation, such as the method of multiple scales and the Poincare-Lindstedt method, are discussed in detail through a Duffing oscillator with delayed velocity feedback. It is shown that the two perturbation methods are effective only in solving the approximate solution of the first two orders. An ambiguity or paradox will be encountered when they are used to seeking for the third or higher order approximation of solution.

其次，以一具有时滞速度反馈的Duffing系统为例，研究了经典摄动法如多尺度法，Poincaré-Lindstedt法等在求解时滞微分方程级数解时的适用性和局限性问题，指出利用这些方法只能有效求得系统的前两阶近似解，而在求系统的三次以上近似解时会出现矛盾或二义性。

It was just a normal day of school

那只是上学的普通一天

Which is a very good reference in this issue.

这是一个在这个问题上很好的参考。