查询词典 variation method

In this paper, by using iteration and variation method, the perturbation problem in quantum mechanics will be sloved.

如果满足用微扰方法求解问题的条件，似乎问题已经解决了(见文献[1])。

The equations of a high-speed rotating plate are obtained using Jourdain＇s velocity variation principle and the finite element method and MTA are used for discretization.

基于Jourdain速度变分原理，先推导出做高速旋转薄板的动力学连续变分方程，再用有限元法对柔性薄板进行离散。

This research concentrates on the optimal factor selection of this modification with Kolmogorov test. The factor is a constant for all tolerance. This optimization method can bring a significant reduction of the difference between variation analysis and tolerance analysis. The thesis presents a framework to model and evaluate assemblies and their assembly process for autobody structure concept design. This framework makes the autobody structure concept design more science-based than experience based, and will significantly enhance the dimensional quality of autobody assemblies.

本文的研究以理论推导、数值模拟为主，结合生产实际数据的对比分析，在前人研究的基础上提出了并行车身结构概念设计方法，将依据经验的车身结构概念设计上升为依据严密数学推理和运算的过程，为进一步提高车身的尺寸质量提供了新的思路，同时对飞机、家电等薄板装配机械产品的设计和质量控制也具有重要的借鉴意义。

It can solve seismic velocity problem in the area with lateral strong velocity variation. A new method is developed to improve the precision of velocity model building.

从射线理论的程函方程出发，提出了一种没有过多理论条件约束的基于模型全局优化剩余曲率分析速度建模方法，理论和实际资料的计算证明了该方法的有效性。

The effect and variation of major gene are estimated by the maximum likelihood method implemented via expectation-maximization algorithm. Major gene is tested with the likelihood ratio test statistic.

该方法以EM算法实现的极大似然估计方法进行主基因的效应估计，以似然比统计量进行主基因的各种遗传假设检验。

In order to obtain more general solution of second order linear differential equation with constant coefficients, which is important in theory and practice, on the basis of knowing a special of the second order linear differential equation with constant coefficients and by using the method of variation of constant, the second order linear differential equation with constant coefficients is transferred to the reduced differential equation and a general formula of the second order linear differential equation with constant coefficients is derived.

为了更多地得到理论上和应用上占有重要地位的二阶常系数线性非齐次微分方程的通解，这里使用常数变易法，在先求得二阶常系数线性齐次微分方程一个特解的情况下，将二阶常系数线性非齐次微分方程转化为可降阶的微分方程，从而给出了一种运算量较小的二阶常系数线性非齐次微分方程通解的一般公式，并且将通解公式进行了推广，实例证明该方法是可行的。

The method uses pulse expansion for the spatial variation and a linear interpolation in time.

该方法采用适合于空间变化和时域插值的脉冲扩展。

When the deformation modulus of soil is logarithmic normal distribution, even if the variation is large, reasonable precision can be obtained by center point method, in which the deformation modulus of soil is normalized equivalently.

对于土的变形模量服从对数正态分布的情况，采用将其当量正态化后的中心点法即使在参数大变异的情况下也可以获得理想的计算精度。

The RLS method exhibits lower variation in response signal for the same weight of BSA, human serum albumin and γ-globulin and has been successfully applied to the determination of the total protein in human serum samples.

用共振光散射方法对相同量的牛血清蛋白，人血清蛋白和γ—球蛋白进行测定，其相应的信号变化不大。

Using numerical simulation method, the variation of magnetic field-strength along the axis of helical current with the helical pitch and position is analysed in detail.

应用数值模拟的方法，细致地分析了螺旋线电流轴线上磁场随螺距和位置的变化关系。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。