结构函数

The study of morphisms and of the structures over which they are defined, is central to category theory.

最常见的这种过程的例子是在某种意义上保持结构的函数或映射。

Refraction index of semiconductor material is a function of optical frequency, called dispersion relation.

半导体材料的折射率是光频率的函数，所以在计算光子晶体的能带结构时毖须考虑到色散关系。

The implementation of the cross section function of the beam is a difficult poi- nt in the optimum design of structures consisting of bar, membrane and beam elem- ents.

梁截面函数的处理是杆、膜、梁组合结构优化设计的一个难点。

This paper is mainly focused on data segmentation and model reconstruction problems in Reverse Engineering fields,The main contents include Sharp Featurebased quadrilateral domain extraction from a mesh model,connectivity between multiple B-spline surfaces,fast algorithm for fitting multiple B-spline surfaces on model with arbitrary topology,setting up a hierarchically structured constraintbased data model and binary cubic interpolation of splines with C~2 connectivity for type-Ⅱtriangulations on rectangular domain.

主要内容包括：网格数据的数据分割及矩形片的提取、多个B样条曲面间光滑拼接、任意模型的多个B样条曲面拟合的分块快速算法、基于二元三次样条函数在TYPE-Ⅱ分割下的曲面重建方法、基于约束和层次结构的模型表示及一个小型逆向工程软件系统的建立等。

In the second chapter, during the study of compound x-ray refractive lenses, diffraction function of compound lens is derived in the light of refraction and absorption effect and the design theory of X-ray is deduced using diffraction theory in connection with the characteristic of X-ray band.

在第二章X射线聚焦组合透镜的研究中，针对X射线波段的特性，综合考虑折射和吸收效应得出组合透镜的衍射屏函数，利用衍射理论推导出X射线聚焦组合透镜的设计理论并进行结构设计与微细加工制作技术研究。

In the present work, usingFCPC method, we have performed systematically the theoretical investigationsfor the electronic charge density, high-order Zeeman effect and hyperfinestructure.

本文通过研究这些物理量的收敛性质发现，波函数第二项对这些物理量的合理描述起着重要的作用，特别是对高阶Zeeman效应和超精细结构参数的影响。

They also pointed that the existence of an affine atlas is soley determined by the topology of the Riemann Surfaces.

同时也指出了样条函数的存在性与黎曼面的结构有着深刻的关系。

The second-order Godunov method based on adaptive unstructured grids is applied to solve two-dimensional Euler equations. Methods for the calculation of numerical conservative fluxes passing through the triangle edge are given.

2建立了基于非结构网格的高阶Godunov格式，给出了一种确定通过三角形网格单元边界通量函数的方法，并对单调约束条件进行了改进。

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。