查询词典 numerical method

The following are main contents studied: A finite element method for Navier-Stokes equation with ALE formulation is considered and by combined with theNewmark method of numerical intergration a pressure correction scheme is obtained for the solution of the FE formulation of N-S equation. Because the incompressibility condition can be satisfied approximately in this scheme, the interpolation functions of elements can be equalorder for the velocity field and pressure field. In the ALE formulation the fluid-solid interaction analysis became a three-field coupling problem of the fluid field, the solid field and the fluid dynamic mesh. The properties and charactiristices of this three-field coupling problem are deeply discussed.

研究的主要内容有：主容器中流体大晃动是一种强非线性问题，文中研究了求解ALE描述的粘性流体N-S方程的有限元方法，以有利于大晃动自由液面的跟踪和流体大晃动中非线性现象的描述；并结合Newmark数值积分法推出了求解ALE型N-S方程的压力修正解法，由于这种解法可以近似满足不可压条件，因此可以采用速度场和压力场等阶插值的有限元离散格式，从而较好地解决了普遍采用的不等阶插值解法中，速度场和压力场数值精度不一致、程序编制不便等的不足。

The process calculation of the shell and tube steam heater was carried out with the method of numerical analysis method.

将数值分析方法应用于管壳式蒸汽加热器的工艺计算，很好地解决了试凑法的盲目性和计算工作繁重的问题，并在此基础上用VisualBasic语言开发了管壳式蒸汽加热器工艺CAD软件。

In order to forecast and simulate reasonably the behavior of oil spill, the thesis presents a progressive simulation method based on"oil particle"method, namely, dividing the oil spill behavior into self-expansion and turbulent current expansion, then using different numerical methods to simulate and forecast.

为合理地预测模拟溢油的行为动态，本文在&油粒子&模式的基础上提出了溢油运动的分阶段模拟法，即将溢油运动过程分为自身扩展和湍流扩散两个阶段，分别用不同的数值方法进行模拟预测。

Finally the numerical results are presented to confirm the effectiveness of Gauss-Seidel parallelized with alternate tiling method,specifically compared with owner-computing and red-black Gauss-Seidel methods,and show that the new parallel iterative method has better parallel efficiency as well as scalability.

许多物理应用问题的求解都归结为求微分方程数值解，其核心是高效地求解线性方程组，GS(Gauss一Seidel)和SOR迭代算法以其高效性和实现简单的特性成为大型线性方程组求解的重要算法，并且常用作非定常迭代算法的高效预条件子，是许多应用软件的核心算法之一。在并行处理系统

Taking an old gas field in the Sichuan Basin as an example, this paper selected the wells with complete logging suite, and took the core analysis data as the research understructure. On the basis of accurate lithology identification, the log data numerical processing with high precision was completed by applying optimal log interpretation method. The comprehensive reservoir log interpretation was carried Out and a good result was obtained for the fine log processing and interpretation of reservoirs at 10 wells in this old gas field in the Sichuan Basin by use of such a method.

为此，以四川盆地的某老气田为例，提出了利用测井曲线相对齐全的关键井来构建其他老井测井曲线的新方法，并以岩心分析资料为研究基础，应用最优化测井解释方法，在准确识别岩性的基础上对该气田10口井完成较高精度的测井资料进行了数字处理。

Formulations of the method as well as the numerical example to validate the method are given.

通过该方法和其它方法的数值算例结果对比证明了该方法的有效性。

Numerical results show that THMD s et can achieve an effect close to that of an ordinary TMD,while out performing TLD and TLCD,that the control-ling performance of THMD set b y the optimum dynamic method is much better than that set by the ge neral methods,and that the design of THMD dimension set by the opti mum dynamic method is more reasonable for using the structural inner s pace.

算例分析表明，THMD可取得与TMD相当，优于TLD、TLCD的控制效果；而运用最优动力方法设置的THMD的控制性能明显优于普通方法，并为适应结构物内部使用空间要求提供了更为宽松的条件。

Since RKPM is a kind of Galerkin meshfree methods, in this thesis, penaltyfunction method is employed to enforce the essential boundary conditions,trapezoidal rule is used for the approximation of displacement field function, Gaussand Hammer quadratures are applied for the numerical integration of systemequation,self-adapting method is applied for confirming the support of the pointinterpolated.

针对 RKPM 是一种伽辽金型的无网格方法，本论文采用罚函数法引入位移边界条件，用梯形积分法则近似位移场函数，对系统方程进行积分时分别使用了 Gauss 积分和 Hammer 积分，采用自适应的方法确定计算点的定义域。

The results of this method agree well with the theory data. On the same time, the present method costs much less than numerical methods. In a whole, it is applicable to the parametric design for the heat shield of projectile.

采用这种方法计算出的表面热流、温度与理论值吻合较好，而计算效率又远远高于纯数值方法，适合于弹头防热方案的初步设计阶段。

A novel numerical boundary condition is presented in the paper, which is compared with the method of measured equation of invariance on computational time and memory requirement. It is demonstrated that the new boundary condition is of benefit both on the time and memory, therefore is an efficient method for computation of electrically large dimension objects.

本文给出了一种新的吸收边界条件，并与不变性测试方程法、矩量法在计算时间、存贮空间方面进行比较，结果表明运用这个条件在计算时间和存贮空间上都具有优点，是计算电大尺寸媒质柱体电磁散射特性的一种有效手段。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新