Using the second order perturbation theory, the formulae of vibrational force constants are derived in part one.
运用二阶微扰理论，本文第一部分首先计算了高阶力常数的表达式。
The frequency stability, amplitude stability and harmonic content can be deduced from the second order perturbation solution of that equation.
方程的二阶近似解显示出非线性效应对振荡频率稳定度、振幅稳定度及波形正弦纯度的影响。
The second order perturbation solution for the flow of power-law fluid in stillness a helical pipe is obtained with curvature and torsion as small parameter.
以曲率和挠率为小参数得到螺旋管道内幂律流体流动的二阶摄动解。
The relationship between physically observable quantities and perturbed wave vector is explored on the basis of BBGKY hierarchy equations and the second order perturbation theory.
基于BBGKY方程，采用二阶扰动理论探索了可观物理量与扰动波矢的相互关系。
Thickness effect on the shallow donor in parabolic quantum dots within magnetic fields is investigated by using the second-order perturbation method.
本文采用二级微扰方法研究厚度对抛物量子点内浅施主杂质处于磁场中极化子效应的影响。
Finally, under suitable assumptions, we obtain the upper semicontinuity and the lower semicontinuity of second-order adjacent derivatives for the weak perturbation maps.
最后，在恰当的假设条件下，获得了弱扰动映射的二阶邻接导数的上半连续和下半连续性。
This study calculated the statistical moments of settlement for shallow foundation by using second-order perturbation stochastic finite element method.
笔者探讨了这一方法，考虑土性分布参数和荷载变异性，用二阶摄动随机有限元法进行了浅地基沉降的概率分析。
The results show that the effect of second-order perturbation results on the natural frequency of arch bridge can be ignored.
结果表明二阶摄动结果对拱桥固有频率的影响可以忽略；
In this paper we consider second order nonlinear terms, set up more precise dynamic system's model and derive the computation formula of terminal perturbation deviation by state variation.
本文考虑到二阶非线性项，建立起更加精密的系统模型，推导出利用状态变分计算终端干扰偏差的公式。
This paper proves the existence, uniqueness and periodic problem of the solution about second order singular perturbation system by using the differential inequality.
本文用微分不等式证明了二阶奇摄动系统解的存在性、唯一性和周期性。
Compared with first-order perturbation, second-order perturbation stochastic finite element has the advantage of higher accuracy.
与一阶摄动随机有限元相比，二阶摄动随机有限元具有较高的计算精度。
Taking a proper asymptotic sequence and perturbation technique, the control equations, the continuity, equilibrium and compatibility conditions of the first order and second order are derived.
采用小参数摄动法，导出了系统的一阶和二阶控制方程，边界条件，连续条件，平衡条件及相容条件。
Based on the second-order perturbation technique, the stochastic finite element method (SFEM) of the strength analysis of the turbine blade is introduced in this paper.
本文基于二阶摄动技术研究叶片强度分析的随机有限元方法。
The cross sections for such processes are calculated in second order perturbation theory and expressed in term of the intensity of laser radiation and the nuclearmatrix elements.
用二阶微拢论计算这一截面，结果表示为核矩阵元和激光电场强度的函数。
The cross sections for such processes are calculated in second order perturbation theory and expressed in term of the intensity of laser radiation and the nuclearmatrix elements.
用二阶微拢论计算这一截面，结果表示为核矩阵元和激光电场强度的函数。
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