一阶向量微分方程的微分不等式技巧

利用上、下解方法,研究一阶向量微分方程初值的解的存在性与解的估计问题;同时,将所得结果应用于n阶微分方程的初值问题,获得了n阶微分方程的初值问题解的存在性及估计．     

太阳耀斑的MHD模型

MHD方程组是来解释耀斑的复杂特性的等离子体流体动力学理论的重要模型.为此,主要通过太阳耀斑初期阶段的MHD模型来讨论耀斑的一些特征.     

Integration of Stochastic Differential Equations Using Structural Equation Modeling: A Method to Facilitate Model Fitting and Pedagogy

Stochastic differential equation (SDE) models are a promising method for modeling intraindividual change and variability. Applications of SDEs in the social sciences are relatively limited, as these models present conceptual and programming challenges. This article presents a novel method for conceptualizing SDEs. This method uses structural equation modeling (SEM) conventions to simplify SDE specification, the flexibility of SEM to expand the range of SDEs that can be fit, and SEM diagram conventions to facilitate the teaching of SDE concepts. This method is a variation of latent difference scores (McArdle, 2009; McArdle & Hamagami, 2001) and the oversampling approach (Singer, 2012), and approximates the advantages of analytic methods such as the exact discrete model (Oud & Jansen, 2000) while retaining the modeling fiexibility of methods such as latent differential equation modeling (Boker, Neale, & Rausch, 2004). A simulation and empirical example are presented to illustrate that this method can be implemented on current computing hardware, produces good approximations of analytic solutions, and can flexibly accommodate novel models.     

三类非线性发展方程解的爆破

本文用能量积分方法结合Ｊｅｎｓｅｎ不等式研究了三类非线性发展方程解的爆破性质。     

准坐标下Poincaré-Chetaev方程的Lie对称性与守恒量

建立准坐标下完整力学系统的Poincare-Chetaev方程.给出准坐标下系统的无限小生成元的定义,利用常微分方程在无限小变换下的不变性质研究它的Lie对称性,得到确定方程、结构方程和守恒量的形式.并举例说明结果的应用.     

Nonlinear Riemann Problem for Nonlinear Elliptic Systems in Sobolev Space W1，p（ D ）

The nonlinear Riemann problems were converted into nonlinear singular integral equations and the existence of the solution for the problem was proved by means of contract principle.     

Lévy市场模型中几何平均亚式期权的定价

主要研究了股票价格过程由几何L啨vy过程驱动的亚式期权的定价问题,利用鞅方法,选择股票作为计价单位及相应的等价鞅测度给出了几何平均亚式期权简单的定价公式.     

一类非线性二阶常微分方程解的有界性

本文推广了文献［1］的一个非线性积分不等式，继而利用此不等式研究了一类非线性二阶常微分方程解的性态，所得的结果包含了文献［1］中的全部结果。     

一类集值拟变分包含的灵敏度分析

在Banach空间中引入一类集值拟变分包含，它包含了最文献中讨论的许多变分包含。利用隐含预解方程技巧，在没有可微性假设下，得到了这类变分包含的灵敏度分析。本文的结果推广和统一了这个领域近年来得到的许多结果。     

关于代数基本定理的注记

从数学史的角度给出关于代数基本定理的注记 ,并介绍了中国数学家如秦九韶、林士锷在求解数字方程的研究。