查询词典 atom

In this thesis, the contribution of electric quadrupole (E2) and higher pole transitions to the opacity of hot and dense plasmas of element aurum is taken into account by using an average-atom model.

因此本文在有心力场单电子近似下，利用平均原子模型研究了电四极及更高阶跃迁对金元素的高温稠密等离子体辐射不透明度的贡献。

In the end, we obtain an explicit expression of the spin atom autocorrelation function using flow equation theory.

此外，利用流方程方法得到了原子自旋算符在流中的变化规律及它的自关联函数。

For any substance, the number of atom s or molecules in a mole is Avogadro's number (6.02 ′ 1023) of particles.

对于任何物质，一个莫耳里的原子或分子数是粒子的亚佛加厥数(6.0221367×1023)。

In chapter 5,we introduce the De Morgan algebra of metric and investigate the pseudo-metric Uniformity and the pseudo-metric topology and the separation axioms in De Morganalgebra of metric.We establish the Baire category theorem and the Banach contraction theo-rem,the Edelstein contraction theorem and other fixed quasi-atom theorems in De Morganalgebra of metric.In final,we give a sufficient condition for the metrization of a De Morganalgebra of topology.

在第五章里，我们地德摩根代数中引进了伪度量，探讨了伪度量一致和伪度量拓扑以及德摩根度量代数的分离公理，得到了Baire范畴定理、Banach收缩定理、Edelstein收缩定理以及其它不动拟原子定理，最后给出一个德摩根拓扑代数可度量化的充分条件。

The spatiotemporal spectral line intensities of the first three atomic lines in Hydrogen Balmer series (λ=656. 28, 486. 13, 434. 05nm) of RF ion source plasma, are measured with calibrated Optical Multichannel Analyzer . Some plasma parameters, including electron temperature, hydrogen atom density and hydrogen ion density, are calculated and analyzed Using Partial Local Thermodynamic Equilibrium theory and Abel transform.

实验采用绝对定标后的光学多道分析系统测定了离子源等离子体不同时间和空间位置的氢原子巴耳末谱线系中前三条谱线（λ=656.28，486.13，434.05nm）的强度，并采用PLTE的理论和Abel变换方法，计算出了高频离子源等离子体的电子温度、氢原子浓度、氢离子浓度等参数在放电的不同阶段和径向分布情况，并进行了简要分析。

No matter what substance it may be, it is made up of atom.

不管这是什么物质，都由原子构成。

Such a method can replace traditional reaction with phosgene as the carbonylation reagent, involving the toxic reagent and drastic reaction conditions, the new herein studied method is environmentally benignancy and has atom economical selectivity.

它可代替以往的利用光气来给化合物引进一个羰基的方法，具有原子经济反应的高选择性和对环境的友好性，从而越来越受到人们的关注，已成为C〓化学中羰基合成领域的一个重要的研究热点。

Because they have one nitrogen atom with lone pair electrons, benzimidazole compounds are endowed with capability of complex and molecular recognition and they can analogue biological molecule.

苯并咪唑具有一个含孤对电子的氮原子，从而使苯并咪唑类化合物具有很强的配位能力及分子识别能力，可以用于生物分子的模拟。

In order to improve the catalytic activity, A series of bident ligands containing nitrogen atom were prepared by design, such as bipyridine derivatives, phenantroline derivatives, Schiff base of bipyridine etc.

为了提高催化活性，设计合成一系列含氮双齿配体，如联吡啶衍生物、邻菲罗啉衍生物、含吡啶席夫碱等。

A nucleus is about one thousand billionth the size of an atom.

原子核的体积大约是原子的一千兆分之一。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。