数值方程

Use the DES method that is based on Spalart-Allmaras equation model, numerical value begs solution Navier-Stokes equation, imitate is circled spread the vortical campaign after producing depart.

采用基于Spalart-Allmaras方程模型的DES方法，数值求解Navier-Stokes方程，模拟绕流发生分离后的旋涡运动。

The numerical techniques developed here, including the high accuracy method of using expansions in orthogonal functions in normal direction and the effective algebraic mapping to deal with the problem of infinite region, can raise the calculation precision and the convergence velocity greatly.

文中所发展的方法，如，在法向上采用高精度的高阶谱方法和对无限区域数值问题的更为有效的代数变换处理等，提高了计算精度和收敛速度；同时，通过预估校正迭代法，使抛物化稳定性方程中重要的正规化条件得到满足，保证了数值计算的稳定。

A numerical model based on nonlinear shallow water equations and finite volume method is developed, which can calculate the overtopping discharge of oblique and multidirectional wave on sloping seawall.

本文以非线性浅水方程为基本公式，有限体积法为数值方法建立了可以计算斜向和多向不规则波在斜坡堤上越浪量的数值模型。

The effects of different plant densities on flag leaves chlorophyll content,SOD activity and MDA content after anthesis in stronggluten wheat interplanted in paddyfield were studied.

本试验在江苏淮北地区设计不同密度试验，研究其对稻田套播强筋小麦花后剑叶叶绿素含量、SOD酶活性和MDA含量的影响，结果表明：随花后生育进程推移，叶绿素含量呈下降趋势，且随密度增加，下降幅度增大；花后单茎干物质积累量和单茎籽粒产量亦随密度增加而下降，二者呈极显著负相关；随花后生育进程推移，剑叶SOD酶活性呈单峰曲线变化，可用二次曲线方程模拟，在花后1416 d达峰值，且随密度增加峰值出现时间提前，峰值数值呈先上升再下降的变化特征；随花后生育进程推移，剑叶MDA含量呈上升的变化特征，且随密度增大，数值变大；花后35 d剑叶SOD酶活性与花后单茎干物质积累量和单茎籽粒产量呈极显著正相关，而MDA含量与花后单茎干物质积累量和单茎籽粒产量则呈显著或极显著负相关。

Based on the fundamental solution of two perfectly bonded elastic halfspaces, the boundary integral equation method is used to reduce the problem to a hypersingular integral equation in which the unknown function is the crack opening displacem...

首先根据双材料空间的弹性力学基本解，使用边界积分方程方法，在有限部积分的意义下导出了以裂纹面位移间断为未知函数的超奇异积分方程，并为其建立了数值法。

The unified discrete iterative map model of peak current and valley current controlled buck, boost, and buck-boost converters is established, and the unified piecewise smooth iterative map and their corresponding characteristics equations are also derived.

本文建立了峰值电流和谷值电流控制Buck，Boost，及Buck-Boost变换器的统一离散迭代映射模型，并导出了统一的分段光滑迭代映射方程及特征值方程，通过数值仿真得到了占空比变化时的正、逆分岔图和Lyapunov指数谱。

In Chapter 7, we present some numerical results of our method for image reconstruction problems. Results of two singular problems related to the Poisson equation are also given.

第七章，主要是给出我们的算法在图象重构中的具体应用的数值结果，同时还给出了两个有关Poisson方程的奇异问题的数值结果。

The application of DRBEM to Poisson equation is discussed.

以Poisson方程为例对双互易边界元法的边界积分方程的推导以及数值实现进行了探讨。

Firstly, based on the method of pressure-velocity coupling introduced by SIMPLE algorithm and a revised method of solving the unsteady equation of stream function and vorticity on uniform grid, a special algorithm called primitive-variable-time-dependent approach is formed in the present study. In this algorithm the Navier-Stokes equation in primitive variable form is solved by using the time-dependent approach on non-uniform staggered grid system. The second-order accuracy finite difference is used for the first and second partial derivatives of all variables of the convective terms and diffusion terms.

首先，本文在SIMPLE算法系列处理速度与压力耦合问题的思路和均匀网格下改进的关于流函数涡量方程的数值求解方法的基础上，将非定常原始变量Navier-Stokes方程的求解推广至非等距交错网格剖分，形成了具有本文特色的原始变量时间推进方法，其中对流项和扩散项中各变量的各阶导数均采用二阶精度公式，包括温度在内的离散方程组采用ADI迭代方法求解。

He also extended quasi-geostrophic non-acceleration theorem to primitive equation non-acceleration theorem.

他在国际上首创湿倾斜涡度发展理论和全型垂直涡度方程，成功地揭示青藏高原西南涡和夏季江淮流域的暴雨发展机理，揭示副热带高压形态变异的成因；证明创新的原始方程中的无加速定理以及大气运动的动力强迫和热力强迫的调配率；开展创新性气候动力研究，揭示中高纬和热带海气相互作用差异的机理及厄尔尼诺影响台风频率的机制，继承和发展了我国学者关于青藏高原对大气环流和天气气候影响的研究；在国际上首次把亚洲季风爆发分为三个阶段，证明由于中高纬度的强地转性和斜压性使其海气相互作用的特征与热带显著不同；首次用数值模式提出厄尔尼诺影响台风的机制，得到国际上的高度评价。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。