非数值计算

Analyzing the proved experiences of four kinds of end-bend models, and assuming a minor deviation, with the application of the aforementioned total pressure coefficient and deviation calculation model on the undesigning operating condition, numerical estimate is done on the characteristics change at designing rotating speed (n＝1. 0) after applying five various kinds of end-bend models.

总结了国内外有过成功经历的4种端弯模式，并且在小偏离假设下，应用上述非设计工况总压损失系数和落后角计算模型，对74A压气机采用5种不同的端弯模式后，在设计换算转速（n=1.0）下的特性改变情况进行了数值预测。

The changing rule of the deformed zone and non-deformed zone in the process of bending the vee parts is analyzed.

分析了V形件弯曲过程中变形区与非变形区的变化规律，建立了计算凹模最小深度的公式，并通过数值实例，讨论了工件尺寸与凹模圆角半径对弯曲凹模最小深度的影响。

It adopts Reynolds time-average N-S equation and k-s turbulence model to calculate the inner 3-D viscid turbulence flow of hydraulic turbine. In the unstructured grid, the governing equations are discredited with Finite Volume Method based on Finite Element Method. And the pressure correction method is proposed in numerical calculations.

然后采用基于雷诺时均N-S方程与标准k-ε湍流模型来计算水轮机三维粘性湍流场，在非结构化网格中，采用基于有限元的有限体积法对方程进行离散，用压力校正法进行数值求解。

Thequasi-conforming element methods are the exact solutions of generalized compatibilityequation and satisfy the weak continuity requirement naturally.

叙述了弱形式的弹性力学哈密顿正则方程，边界条件作为非齐次项，以便于采用数值、半解析和解析计算方法。

Design Krylov subspace conjugate residual squared algorithm for nonsym-metric linear systems and the improved conjugate residual squared algorithm for distributed parallel computing based on biconjugate residual method algorithm, and give theoretical analysis and comparisons of algorithms for two algorithms.

基于BiCR算法设计了求解非对称线性方程组Krylov子空间平方共轭残差算法和适合分布式并行计算的改进的平方共轭残差算法，并对两种算法进行了理论分析和算法比较，串行和并行数值试验表明所提方法具有较好的收敛速度和并行性能。

Alternating Direction Implicit-Finite Difference Time Domain is unconditionally stable and the maximum time step size is not limited by the Courant stability condition, but rather by numerical error.

摘要基于交替方向隐式技术的时域有限差分法是一种非条件稳定的计算方法，该方法的时间步长不受Courant稳定条件限制，而是由数值色散误差决定。

Based on the Fourierian law and the non-Fourierian thermal wave theory respectively,the distribution and evolvement of the temperature field are obtained.

对每种情况，分别基于经典傅立叶热传导理论和非傅立叶热波理论来计算温度场的分布及变化，并将得到的数值结果进行比较。

To our best knowledge, there exist only micro modeling results on equilibrium solidification process of hypoeutectic gray iron in the open literature.

根据亚共晶灰铸铁非平衡凝固过程的特点，提出了数值模拟其凝固组织的一套方法，其中主要包括奥氏体枝晶生长过程体积分数的计算以及晶粒接触因素的处理。

The multiresolution time-domain algorithm based on the scaling function of the Daubechies wavelet is introduced, and the perfectly matched layer absorbing boundary condition for the algorithm is deduced. In order to overcome the difficulties due to the nonlocalized property of the MRTD basis functions, the pure scattered-field formulation is adopted. The method presented is applied to the scattering analysis of multiple conducting objects, and the numerical results are compared with those by the traditional finite-difference time-domain method. It is shown that the computational resource is reduced drastically without sacrificing much accuracy.

对基于Daubechies小波尺度函数的时域多分辨分析算法进行了详细论述，推导了MRTD算法的完全匹配层吸收边界条件，为克服传统MRTD方法中基函数存在着非局部性的缺点，在源的加入上采用了纯散射场方法；并应用该算法对多目标的电磁散射特性进行了分析，数值结果表明，MRTD算法与传统的时域有限差分法结果相吻合，大大节约了计算资源。

It is shown that using PSE to study nonparallel stability, especially to study nonlinear stability of nonparallel flow is much more effective. The result, which is comparable with Direct Navier-Stokes Simulations , can be obtained, and the time needed is lessened greatly.

采用PSE方法对于研究非平行流稳定性问题，特别是非平行非线性的稳定性问题极为有效，可以获得与直接数值模拟(Direct Numerical Simulations，DNS)精度相当的结果，而所需计算时间则成数量级地减少。

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。