查询词典 hexagonal system

The hexagonal structure as well as the icosahedral chain in it has been determined by the electron crystallographic analysis.

用电子晶体学方法测定υ-AlCrFe的六角结构及其中的二十面体链。

Under these coordinate systems, the algorithms that translate hexagonal grid cells from an unfolded icosahedron to a sphere were put forward.

球面离散网格模型是管理海量数据的有效途径，如何构建球面网格是这类模型的基础问题。

On the basis of on the analysis of current spherical spatial data structure, the clew of the spherical spatial basal subdivision mode which uses Snyder equal area projection on the truncated icosahedron DGG is discussed, and then global multi-resolution overlay is obtained by subdividing hierarchically on the initial projection plane according to the hexagonal grid.

在分析当前球面空间数据结构的基础上，讨论了利用Snyder等积投影在二十面体上建立球面空间基础剖分方式的思路，然后在初始投影面上采用六边形格网进行层次细分，获得多分辨率的全球铺盖。

By means of X-ray diffraction, nitrogen adsorption, UV-Vis diffuse reflectance, a successful isomorphous substitution of titanium in the silica framework of SBA-15 samples with Si/Ti = 50, 25, 20 has been proved, the substitution of Ti for Si does not change the highly ordered two-dimensional hexagonal mesostructure of SBA-15. Titanium is totally tetrahedral and highly dispersed.

通过X射线衍射、N2气吸附脱附、紫外—可见漫反射等表征手段，证明在Si/Ti＝50，25，20时，钛原子成功地取代了SBA-15中的硅原子而没有改变SBA-15高度有序的介孔二维六角结构，其中钛全部以四配位状态存在，而且高度分散。

The electrostatic potential distribution for square lattice and hexagonal lattice was calculated.

作为算例，计算了在圆柱体排列为正方结构和六角密堆结构时电势分布。

The low-current STM image showed that polyaniline molecular wires on Au(111) clearly exhibited a hexagonal-lattice ordered arrays, and the nearest neighbor distance in all molecular direction was 〓 The easy and feasible route (supramolecular self-assembly with CD-electropolymerization) promises to prepare an insulated polyaniline molecular wire.

低电流STM图像表明在Au(111)表面的聚苯胺分子线为六角的二维有序，分子与分子之间的最相邻距离为〓这种先进行CD超分子自组装后电聚合的方法可能会成为一类制备导电聚合物绝缘分子导线的新方法。

This powerful identity is further reinforced by the hexagonal shape echoing that of the lozenge.

这个强有力的身分被六角形状加强进一步echoing 那锭剂。

Results: Before surgery, the mean corneal endothelial cell density was （2 828±400） mm－2, and the percentage of hexagonal cells was （62±6）% in central cornea.

结果：术前中央角膜内皮细胞密度平均为(2 828±400) mm－2，六边形细胞百分率为（62±6）％。

At the same time, the United States distribution Gates GATES, Italy Michael Gaudi MEGADYNE, Germany obi OPTIBELT, Japan Samsung MITSUBOSHI, Bando BANDO, such as world-renowned brand of industrial belts, product line includes single-sided tooth / double-sided tooth rubber timing belt, poly resin ammonium folder Wire / KEVELER core timing belt, V-belt, ribbed belts, PU opening three / five / hexagonal belt, PU round belt.

同时经销美国盖茨GATES、意大利麦高迪MEGADYNE、德国奥比OPTIBELT、日本三星MITSUBOSHI、阪东BANDO等世界知名品牌工业皮带，产品系列包括单面齿/双面齿橡胶同步带、聚铵脂夹钢丝/KEVELER芯同步带、三角带、多楔带、PU开口三/五/六角带、PU圆带等。

The results showed that the catalyst was hexagonal crystalline rod-shaped nanoparticle α-Fe2O3 with major axis of about (300-500) nm and minor axis of about (20-40) nm.

结果表明，制备的光催化剂为六方晶系的纳米棒状α-FeZO3，其长轴约为(300~500) nm，短轴约为(20~40) nm。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。