exact differential

Starting from the exact differential equations of the circular cylindrical thin shells set by W · Flugge, this paper makes a study of the characteristic equation of the open circular cylindrical thin shells deduced by F · Dischinger.

本文直接从弗留盖（W.Flügge）建立的圆柱形薄壳的位移的精确微分方程出发，分析研究了由迪辛盖尔（F.Dischinger）导出的开口圆柱形薄壳的特征方程。

Exact Multiplicity of Semi-linear Differential Equations' Solutions Involving Concave-convex Functions

含凹凸函数的半线性微分方程解的确切个数

Exact differential forms and quantum mechanics equation

恰微分形式与量子力学方程

A High Convergent Precision Exact Analytic Method for Differential Equation with Variable Coefficients

一个高精度收敛的变系数微分方程精确解析法

In order to avoid finding the exact solution of linear differential equations with variable coefficients, the standard Newton method is modified.

为避免寻找变系数线性微分方程的精确解，文中对原标准牛顿法作了修改。

In this paper, a approximate exact differential penalty function for optimization with inequality constraint is introduced and its properties are studied. As a result, two new penalty methods are proposed and the global convergence of the two methods is obtained.

为不等式约束最优化问题提出一个连续可微近似罚函数并研究它的性质.在此基础上，提出了两个罚函数方法并证明这两个方法是全局收敛的。

As everyone knows, the structure of exact solutions of partial differential equations is an important part of differential equations research.

众所周知，偏微分方程精确解的构造是微分方程研究的重要组成部分。