查询词典 tetrahedron

In a radio wave absorber (10), four hollow tetrahedrons (20) each of which has one open surface are connected such that a surface (20a) opposed to the open surface of the hollow tetrahedron (20) forms a side of a hollow pyramid (22). The radio wave absorber (10) is composed of a radio wave absorbing member shaped like a thin plate.

该电波吸收体(10)呈按照下述方式连接而形成的形状，该连接方式为将4个一面开口的中空四面体(20)以开口面相对的面(20a)作为中空棱锥(22)的侧面的方式形成。

Inosilicate: Any of a class of inorganic compounds that have structures characterized by silicate tetrahedrons (a central silicon atom surrounded by four oxygen atoms at the corners of a tetrahedron) arranged in chains .

链状硅酸盐：旧称偏硅酸盐。由硅酸盐四面体(四面体角上的四个氧原子围绕着一个中心硅原子)排成链状结构的化合物。

Inosilicate: Any of a class of inorganic compounds that have structures characterize d by silicate tetrahedrons (a central silicon atom surrounded by four oxygen atoms at the corners of a tetrahedron) arranged in chains.

链状硅酸盐：旧称偏硅酸盐。由硅酸盐四面体(四面体角上的四个氧原子围绕着一个中心硅原子)排成链状结构的化合物。

When Tenen broke the first word of Genesis into its 'subatomic particles'(the word is actually comprised of two smaller words, meaning "fire" and "six-edged thorn"), he took the "thorn" to mean a tetrahedron and constructed a model of it, placing the "fire," or torus "vortex" form, inside.

当特纳把创世纪的首个单词拆分成&亚原子粒子&（这个词事实上是由两个较小的单词组成，意思分别是&火&和&六角形&），他用&角&这个词来代表一个四面体，并且为它建立了模型，把&火&，或者是花托状的&旋涡&放在里面。

Its rule of change was obtained. On the basis of other studies, the flocculation kinetics and flocs structure was studied. By making some assumptions, collision frequency were presented. Then the the flocculation kinetics model was established through population balance equation. Comparison of experimental data and modeling results indicate that there are the same trend between the two. So the model can predict flocs number and size during flocculation of Yellow River's loess particles without using empirical parameters. The TEM and SEM were used to obsever flocs in the study of floc structure. The flocculation was divided as flocculi, floc and floc aggregate. The flocs structure model was established by assumption that particles position in floc accords with tetrahedron. The fractal dimension of model and experimental flocs was found to be coincident. So the model can reflect the structure of flocs formed in flocculation of Yellow River's loess particles by macromolecule flocculant at a certain extent.

最后，本文还对絮凝动力学和絮体结构进行了研究，在前人研究的基础上，针对高分子絮凝黄河泥沙，对絮凝过程作了一些符合试验条件的假设，建立了颗粒碰撞频率表达式，应用了颗粒数量平衡方程，从而建立了絮凝过程的动力学生长模型，模型计算结果与试验数据对比表明，二者趋势一致，在没有使用经验参数的情况下基本上能够描述黄河泥沙絮凝过程中絮体数量和尺寸分布的变化过程；对絮体结构的研究中，应用扫描电子显微镜和透射电子显微镜对絮体进行了观察，将絮体分为絮粒、絮团和絮网三个不同的生长阶段，通过假设颗粒结合位置符合正四面体，建立了絮体结构模型，计算得到的模型絮体分形维数基本与试验中的实际絮体相符，在一定程度上能眵反映高分子絮凝黄河泥沙生成的絮体结构。

Its rule of change was obtained.On the basis of other studies,the flocculation kinetics and floes structure was studied. By making some assumptions, collision frequency were presented.Then the the flocculation kinetics model was established through population balance equation. Comparison of experimental data and modeling results indicate that there are the same trend between the two. So the model can predict floes number and size during flocculation of Yellow River's loess particles without using empirical parameters.The TEM and SEM were used to obsever floes in the study of floe structure.The flocculation was divided as flocculi,floc and floe aggregate.The floes structure model was established by assumption that particles position in floe accords with tetrahedron.The fractal dimension of model and experimental floes was found to be coincidentSo the model can reflect the structure of flocs formed in flocculation of Yellow River's loess particles by macromolecule flocculant at a certain extent

最后，本文还对絮凝动力学和絮体结构进行了研究，在前人研究的基础上，针对高分子絮凝黄河泥沙，对絮凝过程作了一些符合试验条件的假设，建立了颗粒碰撞频率表达式，应用了颗粒数量平衡方程，从而建立了絮凝过程的动力学生长模型，模型计算结果与试验数据对比表明，二者趋势一致，在没有使用经验参数的情况下基本上能够描述黄河泥沙絮凝过程中絮体数量和尺寸分布的变化过程；对絮体结构的研究中，应用扫描电子显微镜和透射电子显微镜对絮体进行了观察，将絮体分为絮粒、絮团和絮网三个不同的生长阶段，通过假设颗粒结合位置符西安建筑科技大学博士学位论文合正四面体，建立了絮体结构模型，计算得到的模型絮体分形维数基本与试验中的实际絮体相符，在一定程度上能够反映高分子絮凝黄河泥沙生成的絮体结构。

Each tetrahedron shares two of its oxygens with neighboring tetrahedra.

每个四面体都有两个氧原子是与其相邻的两个四面体共用的。

On the base of 3D CAD software's fast modeling and meshing function, three kinds of radomes is modeled and meshed by tetrahedron firstly. And then the coefficients of electric flux density are received by fast moment method based on VIE.

本文首先借助三维CAD软件几何建模技术及网格离散技术，建立了三种结构的天线罩实体模型并用四面体单元离散，接着利用快速VIE-MoM计算出天线罩罩体区域的体极化电流，最终得到在罩体影响下的天线的远场辐射特性。

It can be observed from cyclic Volt-Ampere curves of LiNiO〓 that the insertion and extraction of Li〓, at the site of interlayer octahedra and tetrahedron of LiNiO〓 take place in two steps.

研究了P〓O〓、H〓BO〓、SiO〓和Al〓O〓对LiNiO〓结构和充放电机理的影响。P〓O〓提高了充放电过程中晶型转变的可逆性。H〓BO〓和SiO〓使LiNiO〓由六方晶系向无定形态转化。

The title complexes both have the well-known α-Keggin structure, based on a central PO_4 (GeO_4) tetrahedron surrounded by 12 MoO_6 octahedra arrayed in four groups of three edge-shared MO_3O_(13) octahedra.

标题化合物具有大家熟悉的α-Keggin结构，中心由PO_4(GeO_4)四面体周围有12个MoO_6八面体分成四组排列，每三个共边组成Mo_3O_(13)簇。

The big eared hedgehog, the little owl, the sand gecko, the three-toed jerboa, and every show needs a villain - saw-scale - the viper!

大耳刺猬，小猫头鹰，沙壁虎，三趾跳鼠，每场戏都需要反派角色：蝰蛇。

Plasmodiophora brassicae ; resting spores ; density gradient centrifugation of sucrose ; ultrasonic disruption

根肿；休眠孢子；蔗糖密度梯度离心；超声波破碎