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三四面体

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Each carbon atom is arranged in tetrahedrons in three-dimensional giant structure.

好吧,我承认, BAIDU 是这么翻译的:每个碳原子排列在四面体三维公司结构。

Inventor and early National Geographic Society President Alexander Graham Bell created this tetrahedral truss kite, designed with three-dimensional triangles that could support considerable weight, in order to study aerodynamic design before attempting to build airplanes.

意译:一位发明家又是国家地理学会的总裁贝尔·阿历山大·格雷厄姆创造有四面体的构架风筝,设计出三维的三角形那能够支持相当可观的重量,为了在努力制造飞机之前先研究空气动力学的构思。

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。

The ESR data of 3f suggest that Cu〓 is in a distorted tetrahedral field, that is to say, Cu〓 is coordinated to three tertiaty nitrogen atoms and one chloride anion.

为了探测模型化合物中Cu〓的配位情况和几何构型,采用相同的方法合成和表征了杂双核化合物3f,ESR信号结合质谱信息表明杂双核化合物3f中,Cu〓是四配位的,即它与一个C1〓和三个叔铵氮原子配位而处于变形的四面体场中。

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。

Chapter three explains every step to establish four-dimension reseau specifically, including demonstration and flow chart.

在第三章里面,详细的说明了建立四面体网格的每一个步骤,其中附有说明图和流程图。

Delaunay method for generation of 3D unstructured grids is analyzed and the tetrahedrization approaches are presented.

对生成三维非结构化网格的D e launay方法进行了分析,给出四面体网格生成的基本步骤。

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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

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