隐式差分格式

After determining the control equation and defined problems for infiltration, redistribution and evaporation, implicit finite difference method was used for ponded infiltration, semi-infinite soil redistribution and semi-infinite evaporation. The calculated results agreed well with measured data.

9在确定了入渗、再分布及蒸发的控制方程及定解问题基础上，采用隐式差分格式对垂直一维积水入渗、半无限土体再分布及半无限土体蒸发进行了数值模拟，与计算结果对比表明，计算值与实测值比较符合。

The method uses an implicit iterative scheme with a hyperbolic sine transformation for the matrix potential, takes the advancing front self-adaptive grid, and resolves problem of too much account in calculation to dry earth's surface by fixed grid method. Results indicate that calculation speed is increased greatly and errors are less than by fixed grid method.

该方法使用了水土势双曲正弦变换的隐式差分格式，并采取了自动向下搜索的空间网格形式，解决了干燥地表固定网格计算量过大的问题，同时计算速度大大提高，计算误差小于固定网格法的误差值。

Through error analysis, we prove implicit difference scheme is steady and convergent.

通过误差分析，证明了所建立的隐式差分格式是稳定的。

And then,we propose an implicit finite difference scheme for the similar problems.

接着，本文提出一个隐式差分格式求解上述类似问题。

This paper gives a 45 degree up-going wave equation with an absorbing layer and constructs its implicit difference scheme.

给出了附加吸收层的三维45°上行波方程，构造了该方程的一种隐式差分格式。

Finite element discretization was carried out on the mathematical model to get a fully coupled finite element equation with the parameters of element nodal displacement and element nodal pore pressure as unknown variables. Finally, the transient nonlinear finite element equation in incremental form for reservoir fluid-solid coupling is obtained by means of time discretization in implicit difference scheme.

基于与微分方程等价的加权余量公式，在空间域采用有限元离散，对时间域进行隐式差分格式离散，导出了以单元节点位移和单元节点孔隙压力为未知量的储层流固耦合的非线性有限元增量方程。

In the paper, river and the downstream area of dike are regarded as a whole system, and hydraulic model of coupling 1-D river and gradual dike-break is established, therein the Preissmann implicit difference scheme is applied to Main River, and the FVM is applied to the breach and polder. On the basis of FVM and unstructured grids, TVD ?

本文将河道与堤坝下游区域视为一个整体，对于单一河道采用Preissmann四点隐式差分格式计算，对于溃口及圩区采用有限体积法，建立了一维河道与堤坝渐溃耦联的水力模型，也是一维、二维耦合的水流模型。

Starting with the basic concept about particle transport and the universal form of transport equation, the discuss is concentrated upon the transport equation and the implicit difference scheme under 3-D Cartesian coordinate, as well as the transport equation and the discontinuous finite element scheme under 2-D cylindrical geometry.

从粒子输运的基本概念和输运方程的一般形式入手，重点讨论了三维直角坐标中子输运方程和隐式差分格式，以及二维柱坐标中子输运方程和间断有限元格式。

To avoid time step limitation resulting from the Courant conditions, experience indicates the desirability of using implicit methods.

为了减小计算收敛对时间步长的限制，以便于计算较薄的实验模型我们采用了隐式差分格式。

This part analyzed and compared many kinds of solvement of dam-break , then the adopted traditional one-direction B. Saint. Venant equation and conceal format to calculate the proceeding of dam-break flood, then according to calculation result analyzed influence of villages located beside Fabiela river from dam-break flood.

这一部分首先分析比较了溃坝波的各种求解方法，然后采用传统的一维圣维南方程组和隐式差分格式进行了溃坝洪水演进计算，然后根据计算结果分析了各种溃坝情况下洪水对河道两岸村屯的影响。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。