差分法

The time-dependent Dirichlet boundary condition was used to describe the variation of water head during water level fluctuation.

模型的求解采用效率较高的积分有限差分法进行空间离散，并编制了全隐式联立求解的计算程序，通过变换主要变量，实现了饱和与非饱和的相互转变，采用随时间变化的Dirichlet边界条件精确模拟水位波动时的变水头边界条件。

The analysis of numerical dispersion and stability has been made in this dissertation.

将这种方法应用到时域有限差分法中，建立了一种新的时域算法格式，分析了算法的稳定性条件以及色散关系。

The transmission and dispersive characteristics of slotline are calculated in this paper.

应用时域有限差分法计算了槽线的传输特性和色散特性。

Finite-Difference Time-Domain method is a kind of simple and reliable method which is widely used for solving problems related to electromagnetics.

时域有限差分法(Finite-Difference Time-Domain Method，FDTD)是目前较为成熟的应用于电磁计算的时域方法之一。

The three-dimensional motion equation of the cable-damper system is established and discretized by the finite difference method.

建立斜拉索—阻尼器系统的三维运动方程，并采用有限差分法进行离散化。

The truncation error s in finite differential equation are corrected in solving the model.

在求解过程中，将有限差分法的截断误差进行了修正。

A study was made on the relationship between the stability and convergence when the difference method was used to solve the initial boundary value problem of the autonomous evolution equation.

研究用差分法求解自治的发展方程初边值问题时稳定性和收敛性之间的联系。

Taylor series expansion theorem is a very important method for the construction of finite difference.

时域有限差分法是计算电磁领域中的一类非常重要的研究工具。

Based on the theory of tidal flow and sediment motion, a 2-D depth-integrated mathematical model for the Jiaojiang Estuary is developed by using explicit scheme of finite difference on the triangle elements. The results show that the rotary currents occurring in this area can be simply and effectively simulated by the model. Meanwhile, the suspended sediment concentration simulated is in agreement with the field data.

本文根据椒江口实测水文地形资料，从平面二维水流泥沙基本方程和基本理论出发，采用三角单元有限差分法对水流泥沙方程显示求解，对椒江口潮流泥沙进行了数值模拟，模型简单实用，较好地再现了具有旋转潮波性质的椒江河口水流运动特征，含沙量场也得到了基本正确的反映。

The tether was modeled using finite difference approximation. The balloon was modeled using rigid-body dynamic model including the static derivative, dynamic derivative and added mass.

缆绳采用有限差分法，球体采用经典的六自由度方程，其中气动力导数以静导数、动导数和附加质量表示。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。