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A new structure of the coaxial vibrator is proposed and studied numerically in this paper.

提出了一种双同轴虚阴极振荡器，并对其进行了理论分析和数值模拟。

The extended Poincare map in this paper needs twosurfaces of sections transversal to the flow in phase space,i.e.,relates the crossing of a plane containing one of the collinear libration points back to the periapsis passage.Meanwhile,the map is calculated numerically using the Total-Variation-Diminishing Runge-Kutta integration method to get a good description of the Poincare sections.

文中的推广的Poincare映射需要在相空间中选取两个与流相截的面，即将包含某个天平动点的截面通过轨道来映射到近拱点的通道面上的，在数值上通过总变差减小的Runge-Kutta方法来实现两个相面之间的映射。

Raised panels above the free surface produce less numerical dispersion error, need less CPU consumption and are helpful, combined with collocation point shifting upstream, for satisfying the radiation condition numerically.

该方法对自由面源强分布采用上置，一方面可减少数值计算色散误差及节省CPU时间，另一方面它与配置点前移相互配合能更好地保证辐射条件的满足。

The compressible and oscillating fluid flow velocity, temperature and other major parameters in the orifice PTR have been numerically investigated.

5建立了小孔型脉管制冷机的物理和数学模型，开发了描述小孔型脉管制冷机内可压缩交变流动的二维数值模拟程序，对小孔型脉管制冷机内的流场和温度场特性及其他一些重要的热力参数进行了详细的分析。

The confidence limit has to be numerically obtained,however, the computation is simple and strightforward.

广义置信下限需要通过数值方法得到，但是计算方法是简单直接的。

Electromagnetic fields, caused by high frequency loop current on layer earth, are computed numerically by direct integral of Gauss quadrature, continued fraction expansion and Padé approximation using Matlab language.

在层状介质情况下，本文提出采用直接积分方法——高斯改进型积分、连分式展开法，对高频谐变回线电流产生的电磁场进行正演计算，采用MATLAB语言实现算法。

Take the method of "subarea" and "conjunction" to segment the whole request model to three parts. Making use of boundary continuousness between medium and lining structure at stress and displacement, construct a wave function that can satisfy the stress boundary condition at horizontal surface by the scattering of SH-waves in circular part. And then, availing of the wave function, conjoin the circular part into the semi-circular hollow space at common boundary. The problem can be reduced to solve the question that can only meet the condition of "conjunction". Finally, the solution of the problem can be summarized to a series of algebraic equations and solved numerically by truncating the finite terms of the infinite algebraic equations.

采用"分区"与"契合"的方法，将整个求解区域分割成三部分，利用介质与衬砌结构在边界上的应力、位移的连续性，构造一个可以自动满足水平界面上应力边界条件的圆域对SH波散射的波函数；再利用这一波函数将圆域与半圆形凹陷半空间的"公共边界"进行"契合"，将问题简化成对一个只需满足'契合'边界条件的散射问题的求解；最终归结为对一组无穷代数方程组的求解问题，利用截断有限项的方法对其进行计算。

By finite element analysis method, the temperature field of medium steel plate subject to multiple impinging jet s was numerically simulated and the transverse cooling curve was obtained, which provides theoretical basis for the process design of header pipes of a non restraint quencher.

采用有限元分析方法，对钢板在多股集管冲击射流作用下的温度场分布进行了数值模拟，得到钢板横向冷却曲线，为无约束淬火机上集管的工艺设计提供了理论依据。

The application of Karhunen-Loeve expansion to simulating the soil parameters random field is researched;and the characteristics of the KL decomposition are analyzed;and the Galerkin finite element method is adopted to solve the integral equation numerically in the irregular region and for arbitrary covariance function and to simulate the anisotropic conductivity field.

研究了Karhunen-Loeve展开在土性参数随机场模拟中的应用，分析了KL展开的特点，针对不规则区域和任意类型协方差函数提出了积分方程的Galerkin数值解法，模拟了土壤渗透系数各向异性随机场。

The aim of the subject is to design and check the strength of the gears of crown gear coupling from the Beijing subway and to analyse the teeth by means of 3D FE elastic contact method. The result can numerically and theoretical support the design and manufacture of crown gear coupling.

本课题研究的目的是通过对北京地铁联轴器齿轮副进行强度设计和校核，并且对其进行三维弹性接触有限元分析，得出鼓形齿联轴器齿轮副的弹性接触状况，为鼓形齿联轴器的设计及制造提供数据和理论支持。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。