十二面体

黄铁矿是主要载金矿物，呈细脉状、侵染状、条带状分布，以立方体、五角十二面体为主。

Pyrite is the main Au carrier mine , distributed in the form of small vein , infection and ribbon-like , and is mainly cube , pentagon-based dodecahedron .

计算混凝土中平均最邻近集料表面间距的正十二面体模型

Regular dodecahedron model to calculate the average surface spacing between the nearest neighboring aggregate grains in concrete

该金刚石晶体呈菱形十二面体，其同步辐射X射线劳埃图上大部分斑点分别分布在5条主晶带上。

The diamond is dodecahedron , and most of its diffraction spots on the Laue X-ray pattern are distributed on five main crystal zones respectively .

直接找矿标志为含五角十二面体黄铁矿铁方解石钾长石脉。

The ore-hunting indicator is of calcite-potassium feldspar veins containing pyritohedron pyrite .

纳米十二面体磷酸锌铵的热化学性质及分解动力学

Thermochemical Properties and Decomposition Kinetics of Nanoparticle NH_4 ZnPO_4 with Dodecahedron Morphology

十二面体变几何桁架位置正解的病毒传播算法

Virus Spreading Algorithm for Direct Displacement Solution of Dodecahedron Variable Geometry Truss Manipulator

基于正十二面体模型的视景显示系统

Visual Display System Based on Dodecahedral Model

三头季铵盐阳离子表面活性剂合成菱形十二面体介孔二氧化硅单晶

Synthesis of Mesoporous Silica Single Crystal of Rhombic Dodecahedron Using Tri-head Group Quarternary Ammonium Cationic Surfactant

提出一种十二面体变几何桁架机器人机构正位置分析的代数求解方法。

An algebraic method is proposed for the forward displacement analysis of the dodecahedral variable geometry truss manipulators .

铁铝榴石呈红褐色，菱形十二面体晶形，化学成分以铁、铝、硅为主，含钙、镁等微量元素。

Almandine being red-brown rhombododecahedron consists of iron , aluminium and silicon , containing trace elements of calcium and magnesium .

本文在阐述了重复技术的优点及捷联制导的重复方法（十二面体方法及非正交系方法）后，提出了自己的重复方法。

This article covers the advantages of the repeated method and the applications of the repeated method in strap-down inertial system .

结果表明以五角十二面体晶形为特征的半自形细粒状黄铁矿含金性较高；

The results show that the fine-grained hypidiomorphic pyrite , with a crystal form of pentagonal dodecahedron , contains more Au than others .

这种不盈利和资源过剩不能说是一个硬币的两面，而更像是一个十二面体的两个不同侧面，反映的都是这样一个事实：中国政府一意孤行地拒绝相信任何东西的市场价格。

Rather , they are both facets of the same dodecahedron , as it were : Beijing 's near-pathological refusal to trust market prices for anything .

最后根据晶体滑移本构模型给出了十二面体滑移系和六面体滑移系蠕变参数。

Finally , the creep parameters of 112 { 111 } and 110 { 100 } slip system were given according to the crystallographic constitutive model .

前言：假设吸附过程始终处于平衡态、气泡大小均一以及每一个气泡均为正十二面体，构建了泡沫分离过程的数学模型。

A mathematic model of foam fractionation was set up based on the following assumptions : adsorption equilibrium , same bubble size and regular dodecahedron model of real bubbles .

结果显示，四面体链环是自对偶结构，六面体链环和八面体链环，十二面体和二十面体链环互为对偶。

Our results show that the duality of self-dual tetrahedral link is trivial , and the duality of hexahedral and octahedral link as well as dodecahedral and icosahedral link are nontrivial .

我们在十二面体框架的基础上，利用球面拉伸的方法，得到新的具有二十面体对称性，72个五边形构造的的多面体结构。

On the basis of the frame of dodecahedron , we apply the method of spherical stretching to the frame , we can obtain a novel polyhedron with I_h symmetry , which contains 72 pentagons .

有十二个正五角形面的十二面体。

A dodecahedron with twelve regular pentagons as faces .