二次近似解达到薄壳理论所具有的精度，一次近似解也具有足够精度。
The second approximation of the solution is of the same accuracy as theory of thin shells, and the first approximation is also sufficiently precise for engineering computation.
为了克服这些困难，提出了一种基于序列二次近似算法精确的对偶映射。
In order to overcome the difficulties, a sequential quadratic approximate algorithm is proposed based on exact dual mapping.
本文把缩减弯曲刚度法推广应用于具有不同拉压模数的层板，并且提出了一种求解具有不同拉压模数的层板问题的新的近似方法——二次近似法。
The reduced bending stiffness method is extended to laminates with different moduli in tension and compression, and a new approximate method-twice-approximate method is presented in this paper.
引进一个随机线性二次最优控制问题作为原问题的近似问题。
A stochastic linear_quadratic control problem is introduced as auxiliary problem of the initial problem.
成形压力沿半径方向呈不均匀分布，可用线性或二次函数曲线进行近似表示。
The pressure distributing law is non-uniform along radius direction, which could be expressed approximately as the linear or quadratic function curve.
研究证实，二次缺陷形成的初始温度，可近似代表辐照绿柱石的最佳热固色温度点。
The research also indicates that the temperature resulting from the secondary defects may represent approximately the optimum temperature for the thermal color concentration.
用MLP方法求解一类同时具有二次和三次项的强非线性系统的自由振动问题，得到其二级近似解。
The Solutions of a kind of strongly nonlinear system with quadratic and cubic nonlinearities are derived by means of the MLP method, and its second order approximate solutions are obtained.
夏鸾翔是晚清较早研究微积分的中算家，据其《致曲术》、《万象一原》，可知他在二次曲线求积问题上得到了比较全面的成果，有的已超过《代微积拾级》，某些成果近似近代的椭圆积分。
This paper discusses Xia's achievements on the integral problem about quadratic curve, some of which were similar to modern elliptic integral and surpassed the level of Dai-wei-ji.
推导出高能原电子斜入射时的金属的有效真二次电子发射系数的表达式，它与入射角的余弦近似成反比。
This paper derived the formulation for the real efficient emission coefficient of secondary electron under the condition that high energy primary electron incident on metal obliquely.
常数，线性，二次的和立方近似。
由于该模型比二次模型更近似目标函数，故新算法优于传统的信赖域算法。
Since the homogeneous model can approximate the objective function better than the quadratic model, the new algorithm is superior to the classical trust region algorithm.
特殊裂纹尖端单节点二次单元包括近裂纹尖端位移近似级数展开第二项。
Special crack-tip SNQE includes the second term of the asymptotic series expansion of the displacement fields near the crack-tip.
由此，通过在一个临近SVSR边界的系统运行点处的运算，可以直接得到SVSR边界的近似二次解析表达式。
Thus the approximate quadratic expression of SVSR boundary can be obtained by the calculation on a given operating point close to the boundary.
本文提出了高层抗震结构设计的一个近似计算方法，以及对高层抗震结构分二次设计的设想。
An approximate calculating method and a concept of two-level aseismic design for high-rise structures are proposed in this paper.
首次选取泰勒级数的部分二次项，用一个距原点最近点处拟合的超低维曲面近似极限状态面。
Firstly part of quadratic term of Taylor series is chosen; a low-dimension surface is used to approximate limit state surface; and the modified reliability formula is derived.
应用微分法作近似计算，推导出了齿轮加工中计算第二次径向进刀量的简易公式。
Makes the approximate calculation by the use of differentiation, and puts forward the simple and easy formula of second feeding in processing gear.
然后通过调节同伦参数，对每个不同的参数用复制子等式进行求解，从而得到原二次规划模型近似解。
The approximation of the primal quadratic optimization model can be obtained by solving the regularized one and adjusting the homotopy parameter.
给出了二次网络规化基解的一个优化方向；并获得地次网络规化的一个近似算法和有效算法。
An optimal direction of bases for quadratic network programming is given. There-by, an approximate and an effective algorithm are obtained.
给出了二次网络规划基解的一个优化方向；并获得二次网络规划的一个近似算法和有效算法。
An optimal direction of bases for quadratic network programming is given. There by, an approximate and an effective algorithms are obtained.
基于主蒸汽压力降阶近似模型和二次型最优控制原理，给出了主蒸汽压力的LQ次优调节策略。
Based on degraded and approximate model of main steam pressure and linear quadratic optimal control theory, the LQ sub-optimal regulation strategy is presented.
给出了用切比雪夫多项式方法，求时滞系统的无穷时间线性二次型反鐀控制律的近似解析解的新方法。
A new algorithm derived from Chebyshev polynomials is presented for the approximate analytic solution of infinite-time linear-quadratic optimal feedback control law for time-delay systems.
从空域与时域的相似性出发，把克尔介质近似为时域二次折射率介质，从而得到了脉冲在该介质中的解析形式，并给出了相应的时域传输矩。
From the analogy between pulses propagation in time and the paraxial optics, the nonlinear Kerr media is approached by a time quadratic index media.
螺旋输送器的最大应力强度和最大径向位移均与转速近似地成二次方关系；
The max stress and the max radial displacement of conveyor is also proportional to the square of rotational speed.
减量重复给药后发现，随着第二次给药剂量减少，脑组织中药物浓度与血清药物浓度的比值下降至0.7，近似可接近单次给药后的比值。
In repeated dose decreasing group, the CZP concentration ratio in both brain and serum declined to 0.7 with the dose decrease, almost the same as that of single-dose group.
通过对变形曲线的分析，提出用二次多项式曲线来近似工件的变形曲线。
By analysis of the deformation curves, it is proposed that the deformation curve of the work piece can be expressed approximately by a 2-order polynomial curve.
离散化采用二次等参插值，对应力计算结果作了取近似平均值处理，精度显著提高。
The quadratic isoparametric interpolation is adopted in discretization. An approximate averaging method is proposed to smooth out the boundary stresses and more accurate results are thereby obtained.
进一步的数值分析表明在讨论入射点附近的偏振特性时单次散射和二次散射近似模型具有很高的有效性。
Further quantitative analyses show that single scattering approximation and double scattering approximation are quite accurate when discussing the polarization patterns near the incident point.
由于目的层反射弱、多次波发育，地震资料品质差，为此二次三维采集时选择了近似全三维的观测系统；
The quality of seismic data was poor because complex and special geological conditions make the reflectivity of the objective formations weak and multiples strong.
由于目的层反射弱、多次波发育，地震资料品质差，为此二次三维采集时选择了近似全三维的观测系统；
The quality of seismic data was poor because complex and special geological conditions make the reflectivity of the objective formations weak and multiples strong.
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