正四面体

一种递归构造的互连网络&正四面体递归网络

A Recursively Configured Interconnection Network ── Regular Tetrahedron Recursive Network

正四面体的几何性质决定它不能致密充填空间。

The geometric properties of regular tetrahedron decide that it can not fill space with compact .

H5~-的正四面体中心和正方形中心构型能量的理论计算

The energy calculations for the body - centred regular tetrahedral and the centred square structures of H - 5

结果表明2为氧桥联双核结构Cr（Ⅱ）配合物，Cr中心处于正四面体扭曲的平面四配位构型。

The X-ray result indicates that 2 is dinuclear oxygen-bridged Cr ( II ) complex in a tetrahedrally distorted square-planar coordination geometry .

关于正四面体生成的Sierpinski块的Hausdorff维数

Hausdorff Dimension of Sierpinski Block Generated by Normal Tetrahedron

Fe原子和Si原子按照这种方式在空间交替排列时，位于中心的Si原子仍保持为正四面体结构，这与硅晶体的实际结构是相吻合的。

When they arrange alternatively in space , the central Si atoms can keep the tetrahedron structure , which is in a good agreement with the real structure of silicon crystal .

利用球面和多面角的几何性质，采取逐步覆盖的方法，讨论了球内接正四面体、正n棱柱算法，在这个基础上，提出菠萝形算法和球冠逐步覆盖法。

In this paper , the regular tetrahedron algorithm and the n-side regular prism algorithm were discussed , according to the geometric properties of spheres and polyhedral angles and by using the method of stepwise covering .

DNA序列与正四面体（RT）中的映象点（D格点）具有对应关系。

There is a corresponding relation between a mapping point ( D lattice point ) in the RT ( regular tetrahedron ) and a DNA sequence ( Zhang , 1991 ) .

Ni2+对ETS活性的特殊激活作用可能与其能形成正四面体结构的络合物有关。

The particularly active effect of Ni ~ ( 2 + ) was probably due to the capability of Ni ~ ( 2 + ) to form regular tetrahedron chelate compounds .

首先利用群论，将Td点群中以五个d轨道为基函数的五维可约表示向不可约表示约化，得到d轨道在正四面体场中的能级分裂；

First of all , when the five-dimension reduction representation with the five d orbits wave-functions as the base functions is converted to an un-reduction representation , the energy splitting in tetrahedron crystal field can be obtained .

建立在van'tHoff碳正四面体构型学说基础上的中心手性的概念未涉及非共价相互作用对分子中心手性的影响。

The concept central chirality , which is founded on the van 't Hoff 's hypothesis of tetrahedral configuration of carbon atom , has been widely used until now .

与氧原子、普通氧分子O2和臭氧分子O3的计算结果比较，显示O4分子可以以正方形结构或正四面体结构形式存在，其中正方形结构更有可能是O4分子的真实空间结构。

Compared with the calculated results of oxygen atom , molecules O_2 and O_3 , it is found that both geometric structures of O_4 are possible , but the structure of square is more favorable .

代数方法计算正四面体分子伸缩振动能谱

Algebraic approach to stretching vibrational spectra of tetrahedral molecules

微型正四面体扬声器研制及性能测试

Design and Characteristics Test for Micro Tetrahedral Loudspeaker

放在碳正四面体，的四个角上。

And so now I have hydrogens at the four corners of a tetrahedron .

基于正四面体的八叉树法生成三维有限元网格

Tetrahedron-based octree encoding generate 3D FEM

本文提出了一种递归构造的、适用于基于消息传递（分布存储）的多计算机系统的互连网络&正四面体速归网络。

This paper presents a recursively configured interconnection network-regular tetrahedron recursive network , which is applied to message-passing , memory-distributed multicomputers .

计算结果表明，碱催化过程是一个放热过程，硅原子可从原先的4配位的正四面体结构向6配位的八面体结构转变。

The calculated results suggested that coordination number of Si atom can change from 4 to 6 during alkaline hydrolysis process of TEOS .

其中，边界引力有效解决了流场边界恢复和内嵌边界问题，弹簧振子和正四面体趋进技术有效调整网格结构并提高网格质量。

By boundary attraction the mesh boundary approached the domain boundary and inner-domain boundary , the spring and equilateral tetrahedron approach method optimized the mesh structure effectually .

以自行研制的水下机器人控制系统实验研究平台为实验载体，以4个按正四面体分布的小球构成的合作目标为观察目标，在室内实验水池中实现了水下机器人悬停与定位演示实验。

Accurate station keeping is demonstrated in experiments with our four-DOF underwater vehicle and the observed target which is a regular tetrahedron with four ball-like culminations in our indoor water tank .

在蒲丰投针问题的基础上，把投掷物由一维的针推广到二维的凸曲线，三维的正四面体、正六面体；

This paper tries to generalize the throwing objects from the one dimension pin to the convex curve in two dimension , and even the three dimensional regular tetrahedron and regular hexahedron .

以四组分为主，探讨了多组分体系两类相图的基本特征与制作方法，第一为伪三组分相图，第二为正四面体相图。

The essential characteristic and determination method of two types of phase diagrams for the multicomponent systems were studied . One is pseudo ternary phase diagram , and the other is n-tetrahedroid quaternary phase diagram .

基于声传播的平面波模型，采用向量分析方法导出了十字阵和正四面体阵的测向公式，分析了两者在有效声速变化条件下不同的定位性能；

Based on the plane wave model of sound propagation , the direction finding formulas for a cross array and regular tetrahedron array are derived in a vector analysis method . And their various locating properties under the condition of the effective sound velocity variation are analyzed .

H3正三角形和H4正四面体结构的变分计算

A Variational Calculation of Equilateral Triangle H-3 and Tetrahedron H-4

文中导出了正方排列和正三角梭锥（正四面体）排列两种型式的三维（立体）声系统作为这组公式应用之例。

At last , the cases of three dimensional surrounding sound systems with cube array and triangular pyramid array models by using these formulas are illustrated for example in this paper .