An improvement on numerical integrations for stiff and highly oscillatory differential-equations

The New Advance on the Direct Method of Operational Calculus-On the Solution of nth-Order Linear Ordinary Differential Equations with Variable Coefficients

直接算符演算法的新进展&关于n阶变系数线性常微分方程的解法

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The existence of a nontrivial solution and its dead core problem for a class of nonlinear ordinary differential equations are studied.

研究了一类非线性常微分方程的非平凡解及其死核问题，证明了在参数p的某些取值范围内，该问题存在非平凡解且具有死核；

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Teaching Experiments and Study of Ordinary Differential Equation in MM Education Mode

MM教育方式下常微分方程教学实验研究

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CAI Teaching of a First-Order Ordinary Differential Equation with MATLAB

一阶常微分方程的MATLAB辅助教学

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Existence Interval and Continuation of Solution of Ordinary Differential Equations for Interval Valued Functions and Fuzzy Valued Functions

区间值函数和Fuzzy值函数常微分方程解的存在区间及解的延拓性

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The Stability of First Constant Differential Equation with Variable Coefficient

变系数n次一阶常微分方程解的稳定性

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N-body problem is a system of O. D. E.

N-体问题实际上是一个常微分方程组，它描绘了N个天体的运动规律。

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( 2) The primitive formation of ODE in the process of founding calculus are studied.

深入探究了常微分方程在微积分创立过程中的原始形态和研究状况。

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Ode techniques and applications in Computational Mechanics

常微分方程技术及其在固体力学计算中的应用

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This paper deals with generalized Cauchy-Riemann system in even dimensions, which is transformed to an equation similar to the ones in the plane by using the theory of governing equations.

研究了偶数维空间上的广义Cauchy Riemann方程组，利用有限伸张映射的控制偏微分方程组理论，将偶数维空间上的广义Cauchy Riemann方程组转化为一个类似于平面上的方程的形式。

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The author and his research group have combined the Energy Casimir method with the a prior estimate method innovatively and have attained outstanding achievements.

我们将能量Casimir方法与现代非线性偏微分方程理论中的非线性先验估计方法有创新性地结合起来，在该领域取得了突出的成果。

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On the Necessary and Sufficient Conditions of the Uniqueness of the Solution of the Dirichlet Problem for a Class of Elliptic Partial Differential Systems of Second Order with Constant Coefficients

一类常系数二阶椭圆型偏微分方程组Dirichlet问题解唯一的充分必要条件

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As a direct result a partial differential equation determining the optimal loss-function J ( x) is found and the connection between function J ( x) and optimal vector control function u ( x) is also stated.

导出了求算最优损耗函数J（x）的偏微分方程，以及这一函数与最优控制函数u（x）的关系。

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Boundary and boundary conditions are an important aspect of numerical solutions of partial differential equations where the element free Galerkin method have had to surmount many initial difficulties due to the lack of a finite-element-like Kronecker Delta conditions.

边界和边界条件是偏微分方程求解中的一个重要方面。由于无单元的近似函数不像有限元一样满足可罗内克尔Delta条件，所以基本边界条件的引入是无单元方法中的一个难点。

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In this paper we employ Euler's Transformation to discuss the solvability for a class of LPDOs with varible coefficients. Global solvability for this kind of LPDOs is obtained.

本文应用Euler变换讨论一类变系数线性偏微分方程的可解性，得到了全局可解性。

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Secondly, the differential game proved to have a unique value function, and a partial differential equation is obtained for the value function.

其次，证明了该微分对策模型存在唯一的值函数，并根据微分对策理论推导出了值函数满足的IB偏微分方程；

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Based on regressing the curves of average relative permeability in single well, that the oil saturation distribution, permeability ( K) and average formation pressure have been gotten through seeking numerical solution to this two equations.

在回归出单井平均相对渗透率曲线的基础上，通过求两个偏微分方程的数值解，求出了径向上的含油饱和度分布、地层渗透率K和平均地层压力；

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The key technologies of super-resolution restoration for underground mine surveillance images are researched by using of the theory of partial differential equation, non local means, fuzzy set and Markov random field.

论文利用偏微分方程、非局部均值滤波、模糊集、Markov随机场等理论对煤矿井下监控图像超分辨率复原关键技术进行研究。

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The Galerkin approach is employed to deduce a two-degree-of-freedom nonlinear system under the combination of the parametric and external excitations from the governing partial differential equations.

采用Galerkin法对偏微分方程进行离散，得到包含外激励和参数激励的二自由度控制方程。

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The properties of Quasi shannon wavelet was studied in this paper, and a wavelet collocation method for partial differential equations was conducted.

第一、研究了拟Shannon小波的性质，构造了求解偏微分方程的拟Shannon小波配置法，同时将外推法引入小波配置法，进一步改善了该方法的计算效率和计算精度。

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