查询词典 icosahedron

The atomic structure model of phase Zr2Ni containing icosahedron cluster in Zr-based amorphous alloys were constructed by computer programming.

用计算机编程构造了Zr基非晶合金包含二十面体原子团簇的Zr2Ni晶体相。

The products were mainly in icosahedron and decahedron shape, which exhibited fivefold symmetry and were in high crystallinity.

产物主要呈二十面体形和十面体形，结晶很好并具五次对称性。

Grains link close. Regular decahedron and regular icosahedron are fivefold twin structures.

而本研究沉积的金刚石膜颗粒以八面体为主，颗粒结合良好。

The structural evolution properties of transition metal clusters containing from 13 to 60000 atoms are investigated by means of the Gupta potential combined with the steepest descent method. Four typical structural motifs are considered: icosahedron, decahedron, face centered cubic octahedron, and hexagonal close-packed.

采用Gupta原子间相互作用势结合最速下降法，对四种典型几何结构：Ih、Dh、Fcc-oct及Hcp，研究了尺寸介于13到60000个原子之间的同族元素Co、Rh与Ir团簇的结构演化特性。

The morphologies of diamond include cube, cuboid, octahedron, cuboctahedron, twinned cuboctahedron, decahedron and icosahedron and ball-like diamond using SEM observation. The formation condition of the grains is discussed.

用SEM观察CVD金刚石晶粒形态主要有立方体、长方体、八面体、立方八面体、李晶八面体、十面体和二十面体颗粒以及球形金刚石，讨论了晶粒的形成条件。

The several shapes of diamond grains have been observed in SEM: truncated cube, octahedron, truncated cubo-octahedron, twinned cubo-octahedron, twinned regular decahedron and twinned regular icosahedron. Most of diamond grains are octahedron.

用扫描电子显微镜观察到多种外形的金刚石颗粒：截顶立方体、未截顶正八面体、截顶立方八面体、孪晶立方八面体、正十面体和正二十面体的金刚石颗粒。

Regular icosahedron ; regular dodecahedron ; quasicrystal ; conjugate fractal structural model ; conjugate fractal structural model of quasicrystal ; Penrose pattern ; high resolution structural image by electron microscopy.

正十二面体；正二十面体；准晶体；共轭分数维模型；准晶共轭结构模型； Penrose拼图；高分辨电子显微结构图

Zuni Icosahedron, founded in 1982, is a Hong Kong based non-profit charity arts organization in Hong Kong.

进念二十面体，成立於1982年，为香港注册的非营利慈善文化团体，以香港为基础，向面视界的实验艺术团体。

The structures and stabilities of the ground-states for Cu13-nAgn clusters have been studied by Gupta model potential based on tight binding second moment approximation in combination with a genetic algorithm. It is found that the lowest energy structures of the pure clusters (n=0,13) are perfect icosahedron, and the structures for the bimetallic clusters (n=1～10) have stable structure which are slightly deformed with respect to the perfect icosahedron, The Cu atom prefers to occupy the center of the clusters with higher coordination numbers.

在混合团簇基态结构优化的遗传算法方案中增加了交换算子，结合Gupta紧束缚模型势研究了Cu13-nAgn团簇的最低能量结构，选择合适的交换和杂交概率，可有效地提高优化效率，优化结果表明，Cu13和Ag13是全对称的二十面体，n=1～10的混合团簇能形成稳定结构，其构型是在二十面体基础上发生畸变，Cu原子趋于处在团簇中心，随着Ag原子数目的增加，原子间的平均距离单调增加，团簇的结合能单调减小，Cu2Ag12和CuAg12只存在亚稳结构。

High yield,well-defined gold nanocrystals with shape of icosahedron were synthesized by the rapid reduction of gold precursors with ethylene glycolin presence of polyunder hydrothermal condition for 1 h.Au icosahedron is one of multiple twinned particleswhich has 20 faces,each were enclosed by {111} facet.

采用水热法在乙二醇体系中成功的制备出了形状规则、尺寸为200-300nm的二十面体金纳米粒子，研究结果表明，所合成的纳米颗粒是面心立方晶型，每个晶面都是{111}面。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。