查询词典 spectral

In the first chapter, we have introduced the research background and someresearch achievements of Laplacian spectral radius, and we also introduce somebasic conceptions on algebraic graph.

在第一章中，我们介绍了图的Laplace谱半径的研究背景以及近年来国内外学者的一些研究成果，也介绍了代数图论中的一些基本概念。

In this paper,two new methods of estimating are given and proved for the upper and lower bounds on the spectral radius of a nonnegative matrix ,which is based on two special matrices.

借助两个新的矩阵得到非负矩阵谱半径的两个新估计及其证明，并通过实例与以往的结论作比较，验证了这些估计的有效性及精确度。

At the same time, the sufficient and necessary conditions for holding the control system robust stability are analyzed, and the stability criterion in terms of the spectral radius is presented.

分析了控制系统保证鲁棒稳定性的充要条件，给出基于谱半径的稳定判据。

Firstly, we present some sharp upper bounds on the adjacency spectral radius of graphs, and show that these bounds are somewhat better than the known ones.

首先，我们给出一些图的邻接谱半径的一些新的可达上界，并说明这些新结果在一定情形下比已有的结果要好。

For the subdivision schemes, a formula spectral radius for subdivision operator has been proved.

子分格式不仅是小波分析中重要的工具，也是计算机辅助几何设计的重要方法。

In chapter 2, for the iterative matrix M~(-1)N in solving linear system, upper bounds of the spectral radius of some iterative matrix are discussed.

第二章针对迭代求解线性方程组中的迭代矩阵M~(-1)N，讨论了其谱半径的上界估计。

Among all the eigenvalues of Laplacian matrix, the most important is thelargest Laplace eigenvalue, which is called the Laplacian spectral radius of a graph.

在图的拉普拉斯特征值中，最重要的一个即是图的最大拉普拉斯特征值，称为图的Laplace谱半径。

By the means of combinatorial matrix, the relation between minimum degree of connected graph and upper bound of spectral radius was carefully depicted.

利用组合矩阵方法，精细地刻画出连通图的最小度与谱半径的上界之间的关系，在一定条件下改进了以前的一个结果。

Puthermore,we make a comparison between its optimum spectral radius and that of SOR method and draw a conclusion that these two methods have their own advantages respectively under different conditions.

除了对迭代方法的研究和改进，对方程组本身做某些处理，如对它进行预条件也是有效改善迭代收敛性，加快迭代收敛速度的方法之一。

The results not only is that problem of estimates of upper bounds of the spectral radius for some iteration matrices is solved but also convenient for apply.

解决了以往讨论迭代矩阵谱半径的估值问题，且使用方便。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。