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- Asymptotic expansion method 渐近展开法
- The existence and stability of periodic solution are studied by using the bifurcation theory, linear stability theory and the method of asymptotic expansion. 运用分歧理论、固有值的解析摄动理论和渐近展开的方法,获得了共存时间周期解的存在性和稳定性。
- The existence and stability of co-exist periodic solutions are investigated by using the bifurcation theory, the implicit function theorem and the method of asymptotic expansion. 运用分歧理论、隐函数定理以及渐近展开的方法,获得了共存周期解的存在性与稳定性的结果。
- To discuss a type of reaction diffusion system with functional reaction and periodic coefficients.The existence and stability of periodic solution are studied by using the bifurcation theory,linear stability theory and the method of asymptotic expansion. 讨论具有功能反应的一类捕食者-食饵系统的反应扩散方程组.;运用分歧理论、固有值的解析摄动理论和渐近展开的方法;获得了共存时间周期解的存在性和稳定性
- This kind of model could be written in ODE systems with small parameter.With singular perturbed method,the asymptotic expansion solution which is valid for the model was constructed. 采用了奇异摄动的方法,构造了关于小参数的幂级数展开,作为模型的形式渐近解,并用逐次逼近法证明了该解的一致有效性,从而可以将构造的解作为模型的近似解。
- You can select auto Hydraulic expansion Method to obtaining higher efficiency. 可选用自动油压扩张方式,增加工作效率。
- A class of nonlinear singularly perturbed elliptical problems with boundary perturbation are considered. The uniform valid of the constructed asymptotic expansion is proved. 摘要研究了一类具有边界摄动的非线性奇摄动椭圆型问题。并证明了边值问题解的渐近展开的一致有效性。
- In chapter two, the asymptotic expansion and superconvergence result of a class of second order quasilinear equation in generalized finite element space is presented. 第二章中,给出了一类二阶拟线性方程广义有限元解的渐近展式和超收敛结果。
- Energy Level analysisUsing the Taylor series expansion method, the energy Levels of Nd and Er chelates were analyzed. 利用泰勒展开法,对Nd和Er配合物能级进行了分析。
- The variational-cumulant expansion method has been extended to the case of lattice SU(3) Wilson model. 变分-累积量展开方法推广到研究SU(3)格点Wilson模型.
- By using the so called renormalization group method, we give a uniformly valid asymptotic expansions of the boundary value problems under consideration. 利用重正化群方法,构造了该边值问题解的一致有效渐近展开式。
- Using the matching condition, a class of nonlinear singularly perturbed problems for two boundary layers are discussed. asymptotic expansion of solution for boundary value problem are obtain. 摘要利用匹配条件,讨论了一类三阶非线性奇摄动问题,得出了奇摄动边值问题的渐近展开式。
- Using the modified Jacobi elliptic function expansion method,the periodic wave solutions for the coupled nonlinear Klein-Gordon equations are obtained. 利用修正的Jacobi椭圆函数展开方法;获得了一类耦合非线性Klein-Gordon方程组的周期解.
- By introducing proper stretchy variable and constructing boundary layer function, it concludes N-order approximate solution, and using theory of differential inequality, uniformly validity of asymptotic expansion is proved. 通过引进适当的伸长变量,构造边界层函数,得到了解的N阶近似值,并利用微分不等式理论证明了解的渐近展开式的一致有效性。
- The plane-wave expansion method (PWE) and the time-domain finite difference method (FDTD) are used to analyse the different structures'PBG . 本文分别运用平面波传输法和时域有限差分法对不同结构的光子禁带进行了分析,分析两种算法结果存在的差异。
- This paper considers kinetic undercooling of the crystal growth on the liquid-solid interface,and makes the asymptotic expansion for the perturbed solution of the governing equations. 在晶体液固界面上考虑动力过冷,对凝固系统控制方程的扰动解进行渐近展开,分别求其零级、一级近似解。
- The plane wave expansion method is introduced to calculate the band gap for two-dimensional solid phononic crystals with square lattices. 介绍了用平面波展开法计算二维正方点阵的固态声子晶体带隙的方法,研究不同截面形状的散射物对晶体带隙的影响。
- Under appropriate assumptions, the existence of solution is proved by means of the theory of differential inequalities and the uniformly valid asymptotic expansion for arbitrary nthorder is obtained. 在适当的条件下,利用微分不等式理论证明?解的存在性,得到?解的任意阶近似的一致有效渐近展开式。
- The methodology of the nonlinear iteration nodal method is based on the nodal expansion method (NEM) and nonlinear iteration strategy. 它是以节块展开法(NEM)和非线性迭代策略为基础发展起来的先进节块方法。
- Vectorial eigenmodes supported by the buried rectangular and rib optical waveguides are obtained using variable transformed series expansion method. 基于变量变换级数展开法,获得了掩埋矩形光波导及脊形光波导的矢量本征模及其传播常数。