非线性Hammerstein型积分方程组的固有值

给出有关拓扑度计算的结果,并应用此结果研究非线性Hammerstein型积分方程组的固有元与固有值。     

板模型中一类具反射边界条件的迁移算子的谱

本文研究了板模型中一类具反射边界条件、各向同性、单能、非均匀介质的中子迁移算子的谱，证明了在右半平面中，该算子仅有有限个具有限代数重数的实离散本征值     

Gerschgorin特征值分离性定理的推广

给出了矩阵特征值分布的分离性定理的一般性结果,进而得到了Brualdi型与Brauer型的分离性定理,改进了已有的若干结果.     

临界情形下的一个稳定判别定理

本文考虑时变微分系统X=A(t)X+F(t,X,Y),Y=R(t,X.Y)临界情形下的稳定性问题.当A(t)、F(t,X,Y)、R(t,X,Y)满足一定的条件,获得一个重要的稳定判别定理。     

线性变换对角化问题浅析

对于线性变换对角化与矩阵相似对角化之间的联系,通过对易理解的矩阵的对角化问题来研究相对复杂线性变换的对角化问题,然后通过研究特征值与特征向量的性质,再研究对角化的必要条件与充分条件,从而更轻松的理解并掌握线性变换的对角化问题。     

Between-group analysis with heterogeneous covariance matrices: The common principal component model

Analysis of between-group differences using canonical variates assumes equality of population covariance matrices. Sometimes these matrices are sufficiently different for the null hypothesis of equality to be rejected, but there exist some common features which should be exploited in any analysis. The common principal component model is often suitable in such circumstances, and this model is shown to be appropriate in a practical example. Two methods for between-group analysis are proposed when this model replaces the equal dispersion matrix assumption. One method is by extension of the two-stage approach to canonical variate analysis using sequential principal component analyses as described by Campbell and Atchley (1981). The second method is by definition of a distance function between populations satisfying the common principal component model, followed by metric scaling of the resulting between-populations distance matrix. The two methods are compared with each other and with ordinary canonical variate analysis on the previously introduced data set.     

正矩阵的最大特征值的几何估计

本文给出了正矩阵的最大特征值的一种几何估计。     

迁移理论中一类算子实本征值的代数重数

证明了非均匀有界凸体介质，在散射裂变为各向同性的情况下，与时间有关的单能迁移算子实本征值的代数重数为1。     

线性振子的WKB解

线性振子是用量子力学能够精确解决的几个问题之一．本文用ＷＫＢ方法从另一个角度来求得线性振子的波函数和本征值