查询词典 atomic clock

With the development of science and technology, sensitive, rapid, reproducible, simple and accurate analytical methods are required for the determination of trace elements in geological, biological and environmental samples. The direct determination of extremely low concentration of trace element with modern atomic spectroscopic method, such as atomic absorption spectrometry is so difficult. On one hand, the limitations are associated not only with the insufficient sensitivity of these techniques but also with matrix interference.

随着科学技术技术的发展，在进行地质、环境、生物等样品中痕量金属元素的测定时，常常要求达到ppb级的水平，虽然火焰原子吸收分光光度法具有很高的灵敏度，但是要直接测定这些样品中的痕量组分却很难，这是因为，一方面，样品本身的物理化学状态有的不适合直接测定，或组分的含量低于分析方法的灵敏度；另一方面是存在基体干扰。

The filled skutterudite compound possesses bcc structure as evidenced by electron diffraction analysis. Powder X-ray diffraction data of filled skutterudite samples were characterized by Rietveld method for some crystallographic parameters such as lattice constant, atomic occupation, atomic position, etc.

另外，通过对化合物电子衍射的分析证实了〓化合物是一种具有bcc结构的化合物；运用Rietveld方法对填充skutterudite化合物X衍射谱线进行了分析，对化合物的晶格常数、原子位置的占有率以及原子位置坐标等晶体学参数进行了表征。

Any of two or more kinds of atoms having the same atomic mass but different atomic numbers.

原子数 ：每种化学元素的固有数字，等于原子中的质子数。

The study of HCI is interested in astrophysics, quantumchromo dynamics, hyperfine atomic structure and measurement of atomic mass.

高电荷态离子的研究对天体物理、量子色动力学、原子的精细结构和原子质量测量等研究领域都有着重要的意义。

At present,the sample pre-processing methods mainly include wet digestion,dry digestion and microwave digestion and so on;and the determination methods mainly include inductively coupled plasma mass spectrometry,atomic absorption spectrometry and atomic fluorescence spectrometry,etc..

目前常用的样品前处理方法主要有湿法消解、干法消解和微波消解法等；常用的测定方法主要有电感耦合等离子体质谱法、原子吸收光谱法、原子荧光光谱法等。

What is represented by the symbol AZX is an atomic species called a nuclide of the element X, having an atomic number Z and a mass number A.

符号AZX代表的是元素X的一种核素，其原子序数是Z，质量数为A。

The method is called as simulated atomic transition algorithm, which uses the simulated mathematic model of atomic transition.

与非线性的蒙特卡洛和模拟退火算法等相比较，模拟原子跃迁反演法算法收敛速度快，搜索效率高。

At the mean time, drawing on the concept of e-commerce atomic model, article proposed the atomic ASP model concept.

基于理论分析之后，文章对北京二商集团和上海宇威轴承公司的ASP平台案例进行了研究，进一步说明了对ASP商业模式的构成进行了分析。

The main results in this chapter are as follows:Theorem 2.1.2Let〓be a countable atomic model.If〓is infinite,then〓is a countable atomic model.

本章的主要结果有：定理2.1.2若〓是可数的原子模型，〓不是〓的代数公式，则〓也是可数的原子模型。

On the basis of the improved averaged atomic model,the distribution of the free electrons is dealt with by the partial-wave method to improve the precision of determination of the energy level,electron populations and atomic inner energy.

在改进的平均原子模型的基础上，在中心场近似下用分波法处理自由电子密度分布函数，提高了电子波函数、电子占据数等原子参数的计算精度。

After explaining total design of automated test system for microcircuit , the thesis introduces GPIB standard .

文章在说明了微电路模块自动测试系统的总体设计后，对GPIB标准进行了介绍。

He interceded in my behalf.

他替我说情。