This paper deals with the problems on the existence and uniqueness of bounded solutions and almost periodic solution for third order nonlinear differential equations with time lag.
研究具时滞的三阶非线性微分方程，利用变量替换和不动点方法，得到了此方程有界解和概周期解的存在性及唯一性结果。
Using topological degree the existence of anti-periodic solutions for third order differential systems is studied.
本文利用拓扑度理论研究三阶微分系统反周期解的存在性。
Som criteria on the asymptotic behavior (such as boundness, tending to zero) of solutions for a kind of third order delay functional differential equation are established.
本文讨论一类三阶时滞泛函微分方程解的渐近性质，给出了若干解的有界性及解趋于零的判定准则。
Use the method of boundary layer functions to study the singularly perturbed boundary value problem for a kind of third order nonlinear differential equations.
利用边界层函数法研究了一类非线性三阶微分方程的奇摄动边值问题。
This approach uses the relative analysis to achieve the comparison of the Virtual Third Harmonic of differential current.
原理是利用相关分析间接实现差动电流虚拟三次谐波比较 。
Chapter 4 mainly solved the problems of tooth flank parameterization and the analysis of differential geometric structure, which is the theoretical basis to implement the third order contact analysis.
第4章主要解决了齿面的参数化和微分几何结构分析问题，它是实现三阶接触分析理论的基础。
The universality of the conclusion can be spread to mathematics and mechanics science also and give a popular method to solving this third-order nonlinear differential equation qualitatively.
结论的普遍性可以推广到数学力学学科，并给出了这一类三阶非线性微分方程求定性解的一般方法。
In the third chapter differential games theory based on Q-learning was designed.
在第三章设计了基于Q -学习的微分对策方法。
Solutions for a class of third order nonlinear differential equations are studied by using the Leray Schauder fixed point theorem and the method of Liapunov function.
运用Leray - Schauder不动点定理和Luapunov函数，研究了一类三阶非线性微分方程概周期解的存在性。
As a special case, the third order differential equation is derived when both the premium and the claim size are exponential distributions.
在理赔量和保费量分别服从指数分布时给出了相关推导，得出了具体的三次微分方程。
This paper approaches with the problem of stable area in ordinary nonlinear third-order differential equations, which appears during the operating process of the series motor.
本文研究串激电机运行中出现的三阶非线性常微分方程的稳定域问题。
The differential equations of coal particle gas diffusion under the third kind boundary condition and its analytical solution have obtained on the basis of theoretical analysis.
基于理论分析建立了第三类边界条件下的煤粒瓦斯扩散方程，并给出了解析解。
Third, the piezoelectric method is sensitive to pipe vibration, whereas the differential-pressure method is hardly affected by this kind of disturbance to some extent.
压电式对于管道振动十分敏感，而在一定范围内差压式的输出信号几乎不受管道振动干扰的影响。
By the discretization of spatial variable in the equation, a third-order differential system of equations containing periodic time-varying coefficient is derived.
采用微分求积法对方程中的空间变量进行离散，得到仅含有时间变量的三阶周期系数微分方程组。
This paper uses the monotone iterative technique to investigate the existence of the solutions of a class of boundary value problem for third-order differential equation.
构造了一对合适的上下解，利用单调迭代方法证明了模型的两个平衡点之间行波解的存在性，进一步丰富了单调方法的内容。
This paper uses the monotone iterative technique to investigate the existence of the solutions of a class of boundary value problem for third-order differential equation.
构造了一对合适的上下解，利用单调迭代方法证明了模型的两个平衡点之间行波解的存在性，进一步丰富了单调方法的内容。
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