查询词典 periodic element

Based on the asymptotic homogenization,the periodic boundary conditions for the unit cell are established by using the ANSYS Parametric Design Language,the problem of the unit cell is solved by finite element method and the effective elasto-plastic properties of the composite is obtained,which is compared with other results.

在渐近均匀化方法的基础上，用ANSYS参数设计语言建立周期性边界条件，用ANSYS有限元程序对单胞进行求解，得到材料的有效弹塑性性能。

Based on the asymptotic homogenization theory, the periodic boundary conditions for the unit cell were established by using the ANSYS parametric design language. The problem of the unit cell was solved by finite element method and the effective elasto-plastic properties of dual phase steels were obtained.

在渐近均匀化方法基础上，假设双相钢的结构为周期排列，通过ANSYS参数设计语言建立周期性边界条件，用ANSYS有限元程序对3种平面应变模型的单胞进行求解，得到双相钢的有效弹塑性性能，并与其他计算结果进行比较。

Lanthanides belong to the sixth cycle of the periodic table Ⅲ B family, are all solid metal, they are La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, holmium, erbium, thulium, ytterbium, and lutetium were 15 kinds of metals and their periphery are two layers of electronic 5d16s2, while the peripheral third layer f orbital but never zero to 14, so the external electronic structure of 4f0-145d16s2, and therefore these elements in oxidation number are to 3, very close chemical properties, extraction, when it is difficult to separate them they are mostly multi-element mineral mix, more difficult to increase refining, and their atomic number of 57-71, one by one to increase the number of protons the nucleus, and thus extranuclear electron of gravity is also growing, so that atomic radius decreases with increasing atomic number Z, which makes lanthanides contraction, ionic radius is also reduced, which also makes Zr, Hf, Nb and Ta, Mo and W, the atom and ionic radius very close to each other they also determine a similar nature, resulting in difficult separation, also the tribe Ⅷ of the fifth cycle, ruthenium, rhodium, palladium, and the sixth cycle, osmium, iridium, platinum is very similar in nature, thus The six elements, said platinum group elements.

镧系元素属于周期表第六周期中ⅢB族，全部是固体金属，它们是镧、铈、镨、钕、钷、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥共十五种金属元素，它们的外围两层的电子均是5d16s2，而外围第三层的f轨道电子却从零增加到14个，所以外围电子结构为4f0－145d16s2，而使这些元素氧化数均为＋3，化学性质极为接近，提炼时很难分开，它们的矿石又大多是多种元素混在一起的，更增加提纯难度，它们的原子序数为57－71，核内质子数逐个增加，因而对核外电子引力也不断增强，使原子半径随原子序数Z增加而减小，这就使镧系元素收缩、离子半径也缩小，这也使得Zr和Hf，Nb和Ta、Mo和W等原子和离子半径都很接近、也决定了它们彼此性质类似，以致难以分离、也使第Ⅷ族中第五周期的钌、铑、钯和第六周期的锇、铱、铂在性质上极为相似，因而称这六个元素为铂系元素。

These compounds pair one or more elements from the third column of the periodic table( such as aluminum, gallium or indium) with an element from the fifth column( typically phosphate, arsenic or antimony).

这些化合物将周期表第三栏里的一种或多种元素第五栏里的一种元素在一起。

The second element in the periodic table, a lighter than air, inert gas often used to fill balloons.

在周期的桌子中的第二种元素，一个点火者超过空气，惰性的瓦斯时常过去一直填充气球。

Based on the Green function technique,the authors have analyzed the effect of the decoupling approximation on treating the interelectronic correlations and then calculated the local moment,hybridization matrix element,and ground state energy of the one dimensional,symmetric,periodic Anderson model.

基于Green函数技术，作者首先分析了切断近似对处理一维对称周期Anderson模型中电子间关联的影响，然后计算了该模型的局域磁矩、杂化能量元和基态能量。

"It is difficult to separate from niobium, the element above it in the periodic table , with which it shares many properties."

计算金属结合能的尝试几乎没有超过周期表上的第一行的范围。

Consider symmetry of periodic area we get the symmetry transform group, act the eigenvector of self-cognation operator on the node bases element function, a series of orthogonal function is constructed.

找出一般周期空间的对称变换群，并将已知的有限元的单元基函数转化为节点基函数，将变换群的特征子空间作用有限元的节点基函数得出一系列的正交有限元函数。

Aluminum is said to be the thirteenth element in the periodic table.

铝是周期表上的第13号元素。

Aluminium is said to be the thirteenth element in the periodic table.

铝是周期表上的第13号元素。

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