三维

Two basic theorems are given by researching Hamilton's two steps linear differential equations of bender equations which provide widespread application methods of normal differential operator correspond to ladder operators,then the solutions of general equations are obtained by taking advantage of the two above theorems: The energy eigenvalue equation of one-dimensional oscillator; the common state of ; the radial equation of a bondage state of hydrogen atom; the radial equation isotropic three-dimensional harmonic oscillator; the infinity deep potential well of ball

本文通过研究束缚态本征方程里的哈密顿算符的二阶线性常微分形式，给出两个基本定理并证明，提供构造二阶线性常微分算符相应的阶梯算符的普遍实用的方法，然后利用这两个定理构造量子力学中常见力学量的阶梯算符，并用以计算其能量本征值和对应本征函数：一维谐振子的能量本征方程；共同本征态；氢原子束缚态径向方程；三维各向同性谐振子的径向方程；无限深球势阱。

It includes high-level commands for two-dimensional and three-dimensional data visualization, image processing, animation, and presentation graphics.

它包括高级的二维，三维数据可视化，图像处理，模拟，图形表示等图形命令。

Show 3D process, it should not only two-dimensional projection of the plane, but also to ...

显示三维图形的过程中，不仅要将它投影到二维平面上，还要确定一个视见体，在投影之前对物体进行裁剪，只显示我们感兴趣的那部分图形。

When realizing the algorithm, the strategy of projection to 2D plane is utilized.

对不同复杂程度的三维地质模型进行切割实验，发现化繁为简和二维投影策略极大地提高了算法效率。

In this paper, We only analyse the projective transformation in3- Dimension space, explain the geometric significance of its column and row's correlation coefficient and give the method of changing the non-full rank projective transformation of3- Dimension to2- Dimension.

对三维空间中的射影变换加以分析，说明其行、相关系数的几何意义及将三维非满秩射影变换改为二维满秩射影变换的处理方法进行探索，这对计算机辅助设计中的图形处理和建立图形数据库是有利的。

Though vector algebra, the theory of Pythagorean Theorem in Three-dimensional Euclidean Space was generalized with n-dimensional Eudidean space.

以向量代数为工具，将三维欧氏空间上的勾股定理在n维欧氏空间上进行了推广，得到了广义勾股定理。

The core idea of the method is to reduce the Hough cumulative dimension of the circle detection based on classical Hough transform, and convert the threedimensional statistical parameter based on the traditional circle Hough transform to two-dimensional parametric statistics about the center of a circle and one-dimensional statistical parameter about the radius of a circle.

给出了一种基于Hough变换的同心圆检测方法，其核心思想是降低经典Hough变换圆检测中的Hough累积维数，将经典Hough变换圆检测时的三维参量统计，转变成基于弦中点的圆心和半径的参量统计。

A successful strategy leading to one-, two-, and three-dimensional (1D, 2D, 3D) systems is the using of metal cations of link reactively stable coordination compounds containing potential bridging blocks, i.e.

一种成功的设计具有孤立异金属多核结构、一维、二维和三维超分子结构的方法就是以"配合物为配体"的策略。

Compared to 2D ultrasonography, 3D TVS can directly get the spacial data of hydrosalpinx, the inner reecho of hydrosalpinx and its neighbor are more clear. 3D TVS is of great importance in the determination of the disease.Key words］3D transevaginal ultrasonography; hydrosalpinx

较二维超声，阴道三维超声的适当应用能更全面立体的提供输卵管积水空间结构，更清晰的显示的内部回声信息及周围脏器的比邻关系，对输卵管积水的定性帮助较大，其不仅降低了扫差难度，而且降低了诊断难度。

In order to resolve this problem,an effective conversion of fitted-body coordinate has been used in numerical simulations of flow field within a facture of layered medium ,resulting in a successful transformation of 2D flow-field calculation within a fracture from a complex physics domain to a regular calculation domain.

为了有效地攻克这一技术难关，在层状介质缝内流场数值模拟中，采用了有效的贴体坐标变换，成功地将二维缝内流场计算从复杂的物理域转换到规则的计算域，从而为我国全三维水力压裂数值模拟软件的开发和应用提供了良好的理论基础和新的思路。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。