半径

Let be the complement graph of G and let be the spectral radius of .

设G为n阶简单图，ρ为G的谱半径，ρ-为补图 G-的谱半径。

Finally, for the spectral radius of a graph with a cut vertex, we give an inequality concerning the spectral radius of the graph and its subgraphs.

最后，对于有割点的图的谱半径给出一个与子图的谱半径有关的一个不等式。

In this paper,lower bounds on the spectral radius of adjacency matrices of trees and perfect trees are discussed by algebraic method and edge switching of graph,and all trees which reach lower bounds on the spectral radius are obtained.

利用代数方法、图的边变换，以及树的邻接矩阵谱与L ap lacian谱的关系，研究树和完美树的邻接矩阵谱半径和L ap lacian谱半径的下界，给出达到下界的所有极树，得到的新结果改进了文献[2]的结论。

The second chapter studies the spectral radius of unicyclic graphs given order and edge independence number, the spectral radius of bicyclic graphs.

第二章，研究了给定阶和边独立数的单圈图的谱半径，研究了双圈图的谱半径。

Through constructing the function between the radius of a sphere and its auxiliary variables, the radius can be obtained if one of the coordinates of each spherical point is measurable and the other two are constant and unknown.

当球面点的坐标分量之一已知，而另外两个分量固定不变但未知时，通过建立球半径与辅助变量之间的关系，可达到测量球半径的目的。

High-precision spherical components have been widely used in precision machinery and aerospace industry, and spherical curvature is one of determinant to the capability of optical components, and the measure of it is an important matter in the optical component manufacture. So the research of the high precision measurement of spherical curvature has important significance.

中文摘要高精度球面元件在精密机械和航天工业中的应用越来越广泛，在光学生产的加工制造过程中也大量需要对具有球面形状的透镜的曲率半径进行高精密测量的情况，因此，球面元件曲率半径的精密测量对高质量球面样板，光学系统的质量控制等方面具有重要的意义。

The curvature radius of optical sphere is an important parameter to determine the properties of an optical sphere. The measurement result of the spherical curvature radius can be used to assess the quality of an optical component.

光学球面曲率半径是决定光学球面光学特性的重要参量，通过测量光学球面的曲率半径，可以审核光学元件设计制造质量。

The experiments and simulations are performed by using a conical lens whose radius is 15 mm and basic angle is 1°. The experimental results are compared with the theoretical analysis and computer simulation results. The comparison indicates that the influence of eccentricity on the diffraction mode decreases as the radius of curvature of incidental spherical wave and the propagation distance decrease.

使用半径为15mm，底角为1°的圆锥透镜进行计算机仿真和实验，最后将实验结果与理论分析和仿真结果相比较，证明球面波的曲率半径和出射光束的传输距离越小，偏轴对衍射模式的影响越小。

For the axicons with 20 mm radius, 10-2 cone angle, when using incident spherical wave whose radius of curvature varius from 1200 mm to 1400 mm, the focal length increases from 200 mm to 120 mm and the lateral intensity distribution increases only 15μm.

对于半径20 mm，锥角θ=1×10－2的圆锥透镜，采用曲率半径为1200~1400 mm的球面入射波，可扩展焦深200 mm到120 mm，光强的均匀性有明显改善，横向场能量分布形状改变量不超过15 μm，完全达到应用要求。

By the expansion of a function in terms of spherical harmonics, solutions in form of separation about the asymmetry disturbance were studied. At last, by the theory of stability of differential equations, under the no limitation or less than 1 to the symmetry stationary radius, the asymmetry stability of stable and unstable conditions were obtained.

然后利用球调和函数展开，研究了有关扰动的偏微分方程的变量分离形式的解，最后根据微分方程稳定性定理，在肿瘤静止半径没有限制或肿瘤静止半径小于1的情况下，得到了非对称扰动的稳定和不稳定的条件。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。