The existence of periodic solution to nonlinear functional difference equation is considered by using the topological degree, and a periodic solution of this problem is obtained.
利用拓扑度理论对一类非线性泛函差分方程周期解的存在性进行了讨论，得到该问题周期解的一个存在定理。
By using fixed point theorem and constructing almost periodic sequence solution for difference equation, the authors get the sufficient conditions for the existence of the almost periodic solution.
利用不动点方法及对差分方程构造概周期解，获得了概周期解存在的充分条件。
A kind of ordinary difference equation that can be transferred to Euler equation, often appears in polar coordinates solution of elastic problems.
在弹性力学问题的极坐标解答中，经常会遇到一类可转化为欧拉方程的常微分方程。
We adopt two kinds of different mesh refinement process combining extrapolation of difference solution for more accurately solving tokamak plasma equilibrium equation.
利用两种不同的网格精细化方法与差分方程解的外推过程相结合，能更精确地求解等离子体平衡方程。
By use of the time split method, a conservation difference formula is established to find the solution to the shallow water equation based on the finite volume control method from integral equations.
采用二分步法，从积分型方程出发，在有限控制体上建立守恒型差分格式，对二维浅水波方程进行求解。
A finite difference method based on differential-integral equation is presented for the solution of Navier-Stokes equations for incompressible viscous flow.
本文提出了基于微分-积分方程组求解n - S方程的有限差分法求解不可压缩实际粘性流体绕孤立翼型流动。
The instability of Muskingum routing method used in the flood inverse routing in river channel was proved by using difference solution of motion wave equation.
基于河道汇流单位线原理，提出了解决河道洪水反向演算的断面流量相关法。
The instability of Muskingum routing method used in the flood inverse routing in river channel was proved by using difference solution of motion wave equation.
基于河道汇流单位线原理，提出了解决河道洪水反向演算的断面流量相关法。
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