查询词典 difference boundary value problem

The suit upper and lower solution were constructed, and existence and unique of solutions of linear three-point boundary value problem for third order nonlinear differential equation were obtained.

同时，构造适当的上下解，得到了三阶非线性微分方程的三点线性边值问题的解的存在性与惟一性。

In section 2, we study the existence of sign-changing solutions of some three-point boundary value problem by the cone theory and the fixed-point index theory.

本文利用不动点指数定理研究了如下两种二阶微分方程多点边值问题变号解的存在性，同时分别得到了一个正解和一个负解。

Firstly in§2.1, by applying the fixed point theorem the existence of positive solutions for second-order three-point boundary value problem is discussed.

第二节，运用不动点定理研究四阶两点边值问题正解的存在性。

A three-point boundary value problem for a semi-positone second-order differential equation is investigated.

研究了一类半正二阶非线性常微分方程的三点边值问题u +λf =0 ，u′(0 )=0 ，u(1 )=αu ，利用Krasnosel'skii不动点定理得到了正解存在的一个充分条

Existence Result for Semipositone Second-Order Three-Point Boundary Value Problem

利用不动点指数结合平移变换的方法，研究了一类四阶奇异半正边值问题，得到了其C~2[0，1]∩C~4(0，1)正解存在的一个新结果。

three-point boundary value problem,positive solution,cone

本文主要讨论四阶三点边值向题{U&'&'一f'，&('&+g'，&('&，'eo，''，Lu(0=au，u=0，aull一月u，，，(0)=0，7ull(1)+叙邢(1)~0，其中。0，在了，g同超线性，或一超线

This paper study some third-order three-point generalized right focal boundary value problem.

本文研究一类三阶三点广义右焦点边值问题。

And from this variational principle,it can derive the corresponding boundary value problem governing nonlinearly static analysis of Timoshenko beams.

在假定梁不可伸长的基础上，给出了描述几何非线性、物理线性的大挠度Timoshenko梁的变分原理，由此导出了大挠度Timoshenko梁平面静动力学分析的边值问题。

By means of analyzing the noise error, it is proposed to use an algorithm of singular value decomposition total least squares to conduct the interharmonics estimation, namely taking the noise interference at both sides of the matrix equation into account simultaneously and solving the minimum norm problem by least square method under such condition. In the proposed algorithm by means of singular value decomposition of a new augmented matrix and by use of a simple and practical method to determine the number of principal singular value related to signal to noise ratio, the storage calculation of right singular matrix is performed, thus a more accurate frequency estimation of interharmonics can be obtained.

通过分析噪声误差，提出采用奇异值总体最小二乘(singular value decomposition total least squares，SVDTLS)算法进行间谐波频率估计，即同时考虑矩阵方程两边的噪声干扰，采用SVDTLS算法求解该情况下的最小范数解，通过对增广矩阵进行奇异值分解(singular value decomposition，SVD)，采用简单实用的与信噪比相关的主奇异值个数确定方法对分解的右奇异矩阵进行存储计算，得到了较精确的间谐波频率估计结果。

In this article, we discuss the problem of extreme value for Brownian motion with nonlinear drift and study the distribution of the maximum value and minimum value and the first passage time.

本文研究了从x出发的非线性漂移布朗运动的极大值、极小值和首达时问题。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。