查询词典 difference equation

Based on the series expansion technology in complex potential theory established by Muskhelishvili the complex stress functions can be estabished. By utilizing the continuity principle of the boundary condition and the characteristics of far field and according to the comparison of the coefficients of the terms on both sides of the equation with the same exponent the present problem can be transformed into solving of linear equation set.

根据Muskhelishvili复势理论的级数展开技术，构造了合适的各区复应力函数；然后，利用边界上位移、力的连续性条件和远场的性态，通过等式两边同次幂指数的系数比较，将问题转化为线性方程组的求解；结合叠加原理，获得混凝土在此情况下环向应力的解析解答。

They are theory base of physical model and mathematical model.Secondly, we should start with Navier-Stokes equation and equation of continuity.

首先，通过丁坝回流理论和回流计算公式的探讨，分析丁坝回流产生的原因以及回流强度的影响因素，为物理模型和数学模型的建立提供理论基础。

The calculation was based on the continuity equation and Reynolds-averaged Navier-Stokes equation.

计算基于连续方程和雷诺时均N-S方程，采用标准的κ-ε湍流模型和SIMPLEC算法。

In specific, the continuity equation and momentum equation are determined.

该模型已被广泛应用于研究湍流、两相流、反应扩散系统、颗粒流和悬浮流等系统。

The paper presents a new method,based on the essence of continuity equation,to specify the BCs for pressure correction equation.

提出从连续性方程本质出发确定压力修正方程边界条件的新方法。

From continuity equation and Navier-Stokes equation, non-dimensionalized stream function-vorticity equations is derived.

这是能否用有限元方法正确描述流场的关键。

Methods From Newton's equation and the continuity equation, an equivalent analogue circuit model can be derived for each small segment of the coronary arteries.

根据牛顿定律和连续性方程，用电路分析模型来表示冠状动脉的每一小部分。

Firstly, N-S equation and continuity equation in the gap of rotating dynamic membrane separator are founded.

首先，首次通过理论分析，建立起旋转动态膜环隙间的N-S方程及连续性方程，根据动态过滤的特点，描述了环隙间流场的速度分布，并得出膜面压力计算式：〓，通过实验测试，验证了膜面压力解的准确性。

The velocity field was established by introducing the continuity equation into momentum equation.

采用罚有限元法将连续性方程引入到动量方程，获得了速度场分布。

In calculation, the discretization of continuity equation is performed in accordance with semi-implicit Scharfetter-Gummel scheme and the electric field is solved by the current conservation instead of the Poisson's equation, so it saves plenty of time for calculation.

在计算中，对于粒子的连续性方程我们采用Scharferter和Gummel提出的有限差分方法，并用电流守恒方程代替泊松方程来求解电场，从而节省了大量的计算时间。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。