查询词典 atom

An atom or group of atoms with at least one unpaired electron.

至少含有一个不成对电子的原子或原子团。

Symbol R An atom or a group of atoms with at least one unpaired electron.

符号 R 原子因，基团：至少有一个游离电子的原子或一组原子

In order to give a clear description of the Stark effect of Ba atom, a theoretical study based on the perturbation theory have been carried out, results of which are satisfactory in the weak-electric-field region but unsatisfactory in the strong-electric-field region,indicating the unsuitability of the perturbation theory in this region.

为了更好的解释所观察到的光谱现象，并对Ba原子Stark效应的物理内含进行深入的了解，我们用量子微扰理论对Ba原子在电场下的Stark能级分裂情况进行了理论分析。

In this paper, urushiol-Titanium chelate polymer was synthesized through tetrabutyl titanate reacting with the product which is from polymerization between urushiol and formaldehyde, which endows urushiol and Titanium atom with macromolecular performance and functional performance, respectively.

根据其结构特点，本研究利用漆酚先后与甲醛和钛酸丁酯聚合形成高聚物，使得漆酚高分子功能化、钛原子高分子化。

The valence electron structures of above cells were calculated based on the average atom model.

运用平均原子模型计算了这些晶胞的价电子结构。

When it is in this condition, the atom is said to be in a valence state.

当它处于这种状态时，这个原子就可说是处于价态。

Methods: Using X-ray spectrum and the atom spectrum analysis technique in medicine research's method.

运用X射线谱分析和原子光谱分析技术在中药研究中的方法。

The state of being composed of atoms.Of or relating to an atom or atoms.A city of southeast Washington on the Columbia River near its confluence with the Snake and Yakima rivers. It grew during World War II as a supply center for the nearby Hanford Atomic Works.

帕斯科美国华盛顿州东南部一座城市，位于哥伦比亚河与斯内克河和亚基马河的汇合点附近，在第二次世界大战中作为汉福德原子工事的供应中心而发展起来。

The results show that the angular distribution of the total differential cross section at zero degree increases and the position of oscillation minimum of the same order gradually shift towards small scattering angle along with the increase of the incident isotope He atom mass at identical collision energy. And crossing angle between the elastic and total inelastic DCS gradually decreases and the total inelastic DCS gradually increases.

结果表明：在相同碰撞能量时，随着同位素氦原子质量的增加，总微分截面在0°时的角分布逐渐增大，同一级衍射振荡极小值位置逐渐向小散射角方向移动；弹性与总非弹性截面交界角逐渐减小，总非弹性截面逐渐增加。

Using the one-atom theory, the electronic structures of Pt-electrocatalyst with fcc structure was determined as follows:(5dn)6.48 (5dc)2.02 (6sc)1.48(6sf)0.02. Compared to the result obtained by the first-principle method such as FP-LMTO, CASTEP, their results are in good agreement with each other. Comparing the calculations of physical properties such as lattice constants, cohesive energy and bulk modulus by OA method and first-principle method, the result obtained by OA method is in excellent agreement with experimental value, but the result obtained by first-principle method is not accordable. The relationship between the electronic structures and catalytic performance was explained qualitatively by OA method and first principle method according to its electronic structures. Because the d-orbital vacancies increases and static density is high around Fermi energy band, Pt has good catalytic performance.

摘 要：依据纯金属单原子理论确定面心立方结构电催化剂Pt的电子结构为(5dn)6.48(5dc)2.02-(6sc)1.48(6sf)0.02，与采用第一原理的FP-LMTO和CASTEP等方法所计算的电子结构相比较，其结果非常相近；由OA理论和第一原理方法计算的晶格常数、结合能、体弹性模量等物理参数进行比较，OA理论计算的结果与实验值较符合，而第一原理方法计算的结果与实验值相差较大；在此基础上用OA理论和第一原理方法研究了Pt的电子结构与催化性能的关系，由于d带空穴增多和费米能级附近态密度较高，导致金属Pt的催化性能很好。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。