查询词典 tetrahedral surface

Kaolin, one of inorganic material, is composed of more parallel crystal layers of octahehedrdal alundum and crystal layers of tetrahedral silica. Rasicals K-O· are formed hydroxyl by initiator. On the surface of octahedral alundum.

高岭土是由许多平行的铝氧八面体晶层和硅氧四面体晶层组成，铝氧八面体的OH在引发剂作用下可形成自由基K-O·，然后可引发丙烯酸-丙烯酸钠进行接枝聚合。

Nutlets dark brown, oblique subulate, trigonous-tetrahedral, 1-1.5 mm, shiny, usually glabrous, adaxial bottom surface prominent, 2 lateral surfaces equal, a longitudinal rib at their juncture; abaxial surface convex, ovate, acutely 3-ribbed; carpophore sharply curved.

小坚果暗褐色，斜的钻形，三棱四面体，1-1.5毫米，发亮，通常无毛，正面的底部表面突出，背面凸，卵形，尖锐3肋；果瓣柄明显地弯曲。

Nutlets dark brown, oblique subulate, trigonous-tetrahedral, 0.8-1 mm, smooth, glabrous, adaxial bottom surface slightly convex, somewhat smaller than 2 equal lateral surfaces; abaxial surfaces convex, ovate, acutely 3-ribbed; carpophore obscure, short.

小坚果暗褐色，斜的钻形，三棱四面体，0.8-1毫米，平滑，无毛，正面的底部表面有点凸，背面凸，卵形，尖锐3肋；果瓣柄阴暗，短。

As hexahedral mesh has more advantages than surface mesh and tetrahedral mesh, a research hotpot is concentrated on hexahedral mesh generation algorithm.

由于六面体网格在很多方面具有其它面网格和四面体网格无法比拟的优越性，所以研究热点都集中在六面体网格算法的研究上。

Firstly, the three-dimension boundary question and its corresponding variation question concerning the point-source electrical field on a 3-D structure are presented. Secondly, the finite element method is used to solve the variational equation. The study area is divided into many tetrahedral elements. Then, we interpolate with a tri-linear function in each element. So, the variational equation is converted into a linear equation system. Finally, taking into account saving of time, we make use of symmetric successive overrelaxation preconditioned conjugate gradient algorithm to solve large linear system, and obtain the potential value of each node, resulting in the calculation of the apparent resistivity values on the ground surface.

首先给出了三维构造中点源电场的边值问题以及相应的变分问题；然后利用有限单元法求解变分问题，采用四面体单元对研究区域进行剖分，在单元中进行三线性函数插值，将变分方程化为线性代数方程组；最后，考虑到节约计算时间，利用对称超松弛预条件共轭梯度迭代算法求解大型线性方程组，得到了各节点的电位值，进而计算出地表的视电阻率。

PO〓 was used as promote for the V〓O〓/SiO〓 or MoO〓/SiO〓 catalysts, which exists in tetrahedral symmetry on surface of catalysts and form to P-O-M bond.

PO〓在催化剂表面以四配位形式存在，通过与金属氧化物形成P-O-M键，可降低催化剂中M〓的Lewis酸强度。

If we used potentiostatic electrosynthesis method, a kind of black polymer film was found on cathodic surface when 〓 was more negative than-1. 40V . XPS analysis demonstrated that the film formed from excited pyruvic acid, tetrahedral intermediate and imino acid.

时，电极表面上吸附的丙酮酸，四面体中间体和亚胺酸受激而生成黑色的聚合膜，通过XPS技术对聚合物进行了定性、定量和结构分析。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了