微分的

Then, based on Malthus population prediction model, some new population models are brought in considering more kinds of factors....

再在马尔萨斯人口模型的基础上，引入了考虑众多因素的人口模型，分别基于常微分方程和偏微分方程进行了研究。

In addition, in this paper, some applications of matrix direct product and straightening operator to solve matrix differential equations are discussed.

本文还讨论了矩阵直积和拉直算子在解矩阵微分方程中的1点应用，同时给出了矩阵微分方程解的形式。

Based on the existence of the " mean point s"in Differential mean value Theorem,This paper futher studies the problem of the number of the " mean point s" in Differential mean value Theorem.

在微分中值定理"中值点"存在的基础上，进一步研究微分中值定理"中值点"的个数问题。

There are many problems can be described by the partial differential equation in the natural science and engineering technology field, studying the numeric solution of these partial differential equations is a strong tool for solving these problems.

在自然科学与工程技术领域中有许多问题都可以用偏微分方程来描述，研究偏微分方程的数值解是解决上述问题的有力工具。

By using the classical or nonclassical Lie symmetry method we can get amount of exact solutions of the nonlinear differential equations.

李群方法是研究非线性微分方程的有力工具，应用经典或非经典李群方法，可得到大量非线性微分方程的精确解。

But most of these papers only considered the nonsingular case...

本章主要内容包括：在§1.1中，我们考虑了如下奇异四阶微分边值问题到目前为止，有关四阶微分边值问题已有不少文献，但大多数文献中作者只讨论了非线性项是非奇异的情形，很少有文献讨论奇异的情形。

IDFwas proposed recently to solve the problem in control.In this paper,we study the frequency characteristics of IDF,and then compare it with that of numerical differentiation and typical differentiator.

研究了IDF的频率特性，并与数值微分频率特性、典型微分环节的频率特性进行了比较，然后对其进行了误差分析。

Therefore, numerical analysis has been duly noted and come up with a variety of numerical integration, numerical differentiation, as well as the numerical solution of differential equations, the calculation of the volume comes down to basic computing, which laid the foundation of modern computer based on the numerical algorithm.

于是，数值分析受到了重视，研究出各种数值积分，数值微分，以及微分方程数值解法，把计算过程归结为巨量的基本运算，从而奠定了现代计算机的数值算法基础。

By adapting the existed numerical methods for ordinary and delay differential equations, and matching certain suitable numerical quadrature formulas, Rosenbrock methods are constructed for delay integro-differential equations, the stability criteria of the methods are derived.

通过改造现有常及离散型延迟微分方程的数值方法，并匹配以适当数值求积公式，构造了求解时滞积分微分方程的Rosenbrock方法，导出了其稳定性准则。

A class of systems of impulsive delay parabolic partial differential equations with nonlinear diffusion coefficient is considered.

考虑一类具非线性扩散系数的脉冲时滞抛物型偏微分方程组，利用Green公式、垂直相加法和脉冲时滞微分不等式，获得了该类方程组在Robin边值条件下所有解振动的充分判据。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。