查询词典 tetrahedron

The main structure unit of clay minerals contains silicon-oxygen tetrahedron and aluminium-oxygen octahedron.

其主要结构单元是硅—氧四面体和铝—氧八面体。

This paper analyzes the cause of distortion of octahedron complexes and tetrahedron complexes and states the general methods to judge the distortion .

分析了八面体配合物和四面体配合物畸变的原因，给出了判断八面体配合物和四面体配合物畸变的一般方法：配合物是否发生畸变要看中心离子电子云是否对称分布，若对称分布，就具有规则的八面体或四面体构型，否则，将会发生变形。

The author presents the auto-generation mesh super-elements models of pentahedron and tetrahedron. The computer program for auto-generation of FEM mesh developed by the author can be used to mesh generation of every kind of block structure.

由于作者提出了五面体和四面体超单元自动生成网格的模式，使得所编制的自动剖分程序适用于各种块体结构的网格离散。

As we all know,there is one Simson line at any point on the circumference of triangles,but in this paper, LHP theorem shows that the above conclusion is not correct for any quadrilateral pyramid in three-dimensional space and also during proving LHP theorem,fixed value theorem is proved,at the same time,one guess about the point H and point P on circumscribed sphere of tetrahedron has been concluded.

众所周知，三角形的外接圆周上任一点存在一条 simson 线，而 LHP 定理则指出对于正四面体该结论是不能推广到三维空间上的，并且在论证 LHP 定理的过程中得出了定值定理，同时作为一般四面体的外接球球面上的 H 点、P 点的分布，给出了一个猜想。

The equations of two classes of 3D polynomial maps that are equivariant with respect to the rotational symmetries of either a regular tetrahedron group or a regular octahedron group are strictly given, on the basis of which the properties of the general Julia sets created by these 3D polynomial maps are discussed and proved.

从理论上分析并证明了三维多项式映射满足等变的条件，精确地给出了关于正四面体群和正八面体群具有旋转不变对称性的两类三维等变映射的具体公式，在此基础上讨论并证明了三维多项式映射的广义Julia集所具有的性质。

A series of convenient methods for the preparation of the paper-folded regular octahedron, regular tetrahedron, and regular cubic cone are presented here.

介绍纸折正四面体、正八面体和正方锥形的简易制作方法，并推广应用于制作天然硅盐的多种复杂阴离子结构及某些多酸阴离子结构的模型

OpengL use of light, materials, a list of technologies, the realization of a simple regular tetrahedron, the reference for beginners.

详细说明：利用OpengL的光照、材质、列表技术，实现一个简单的正四面体，适合初学者参考。

Note: The surfaces of the regular tetrahedron (including the edges and the vertices) are considered within the volume.

注：正四面体的表面都可以用来取点。

The result of numeric computation demonstrates that the approximate directional algorithm is robust, the result of Monte Carlo simulation shows that the performance of the optimum four-element array structure is better than the common one or the regular tetrahedron one.

数值计算结果表明，提出的近似定向算法是可靠的；计算机蒙特卡罗仿真结果表明，导出的最佳四元阵列性能优于普通的四元阵和正四面体阵。

The results show that the most stable P5 is the doublet state of b isomer evolved from regular tetrahedron P4 while the most stable P(superscript + subscript 5) and P(superscript - subscript 5) are the singlet state of e, j isomers evolved from square P4, respectively.

结果表明，最稳定的P5为由正四面体的P4演变来的b结构的二重态，P(上标+下标 5)和P(上标-下标 5)则为由正方形P4演变来的e结构和j结构的单重态。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。