查询词典 finite difference approximation

And many finite difference schemes have been widely used to solve hyperbolic conservation laws.

有限差分格式已经被广泛应用于守恒律方程的求解。

Using two-dimensional finite-difference time-domain method, the optical fields of solid immersion lens are studied when illuminated by focusing gauss beam.

采用二维时域有限差分(2D-FDTD)方法研究了高斯光束通过固体浸没透镜的光场分布特性。

This paper is concerned with finite difference solutions of a reaction-diffusion model in the transmission of human immunodeficiency virus.

中文摘要：本文针对一个艾滋病病毒传播过程中的反应扩散模型的有限差分解给出一些数值分析。

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。

The Preissman's 4 points implicit finite difference scheme is applied to develop 1-D river flow model which is provided with the capacity of managing of weirs, bridges and cross regulators.

同时，系统地展示了模型在清河水环境治理研究中的应用，提出了解决清河水环境污染治理的方案。

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。

CO_2 Miscible Flooding ; Multicomponent ; Multiphase ; Unu-isothermal ; Numerical Simulation ; Implicit difference scheme ; Finite element method ; Optimal design ; Economic Evaluation

吉林大学；计有权 CO_2混相驱；多组分；多相；非等温状态；数学模拟；隐格式差分；有限元；优化设计；经济评价

In this paper, the finite difference method for the homogenous initial boundary value problem of symmetric regularized long-wave equation is considered.

本文考虑了具有齐次边界条件的对称正则长波方程的有限差分方法。

It implies that the calculation of movements of mobile cells is not accurate enough, that must affects the mass exchange between the mobile cells and immobile cells. Furthermore, because the value of concentration be calculated is always at center of an element and the finite difference grid is fixed, which may gives rise to numerical dispersion, especially when the steps of space are injudiciously selected.

另一方面，颗粒的位置直接影响到其所含各种成分的质量变化，这将在一定程度上影响最终各种成分的浓度计算精度，而且，该算法最终统计各种成分的浓度时，所用的窗口也是已有的固定的有限差分网格，当网格选择不合适时，有可能产生人工数值弥散。

A finite difference method was derived for the analysis of time domain electric field integral equation of thin wire structures.

提出一种求解基于细线结构的时域电场积分方程的方法-有限差分方法。

We have something to do in the new stage.

在这段崭新的时期中，我们有一些要做的。

The difference between tourism decision-making under uncertainty and risky tourism decision-making is indistinctive.

其中不确定性旅游决策和风险旅游决策的界线比较模糊，两者的区分是相对的。