数值微分

After introducing the line tension contribution to the total Helfrich curvature energy, the axisymmetrical shape equation and the corresponding boundary conditions are obtained in the case of vesicle with one hole.

在得到关于开口泡的形状方程与相应的边界条件之后，本文进一步用数值方法求解了该微分方程。

This method uses the generator model of constant transient voltage and the saliency of generator is included.

本文提出了一种基于特殊二阶微分方程数值积分的电力系统动态安全评价方法。

Then discuss whether the trivial solution will bring the Hopf bifurcation problems or not, at last model the equation using Matlab.

最后，本文利用Matlab对这一类时滞微分方程做出了相应的数值模拟，对所求的数据准确性进行了验证。

The two- and three- dimensional cases are discussed in this paper.

于是对分数阶微分方程进行数值求解变得尤其重要。

In the field of nature and engineering, inverse problems of undetermined parameter are often met.

最近20年来有关偏微分方程反问题的研究，从理论到方法上虽然取得了重大进展，提出了不少有效的数值方法。

In order to improve accuracy and intelligibility of error prediction for one novel target system based on six-intersected-screen, which was used to measure bullet flight vector, a method based on Taguchi and Monte Carlo simulation approach other than traditional differential approach was introduced.

为了解决多光幕交汇立靶测量精度分析过程中运用传统微分误差分析法所得结果偏大，且直观性差的问题，介绍了一种采用数值分析和田口试验方法相结合的改进方案。

Numerical and vectorial analysis Differential calculus: multivariable functions.

数值和矢量分析微分：多变量函数。

Asymptotical and numerical solutions are obtained. The total number of the patients in Beijing is simulated.

得出了该时滞微分方程的渐近解和数值解，并对北京市SARS 疫情中的累计患病人数进行了模拟。

The existence of positive periodic solution is obtained by the help of Mawhin continuation coincidence degree theory and the global attractivity of positive periodic solution is presented by Lyapunove method.

推广和改进了已有的相应的非脉冲微分方程的结论；利用Lyapunov泛函，得到了该系统正周期解是全局渐近稳定的，从而得到了周期解的存在唯一性，通过数值模拟来验证了所得到的结果。

A time domain differential equation model is established by using the axisymmetrical form of the Maxwell's equations,and the finite element time domain method is applied to solve the model.

使用麦克斯韦方程组的轴对称形式建立时域微分方程数学模型，应用时域有限元法求解，给出了数值算例，模拟了在不同缺陷参数下涂有电介质的导体对入射脉冲太赫兹波的响应，并归纳了响应在空间上和时间上的变化规律。

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。