查询词典 atomic element

The fidelities of quantum states of system in Jaynes Cummings model containing atomic motion under action of coherent field are studied. The influence of atomic motion and the field mode structure on the fidelities of quantum states of system in different atomic initial states is discussed.

研究了相干光场作用下的含原子运动的Jaynes Cummings模型中体系量子态保真度，讨论了不同的原子初态条件下，原子的运动和场模结构对体系中的量子态保真度的影响。

It is one of the most important method in chemical research. The course matches Instrument Analysis course. We set up 16 experiments: atomic absorption spectrum, atomic emission spectrum, atomic fluorescent, ultraviolet-visible absorption spectrum, infra-red absorption spectrum, and molecular fluorescent which are for photometric analysis; vottammetric analysis , coulometry analysis ,volt-ampere analysis and polarogarphy for electroanalytical chemistry; Gas chromatography and liquid chromatography for chromatographic analysis.

本实验内容与仪器分析理论课内容相配套，针对光化学分析开设了原子吸收光谱、原子发射光谱、原子荧光、紫外-可见吸收光谱、红外吸收光谱、分子荧光光谱等实验；针对电化学分析开设了电位分析法、库仑分析法、伏安和极谱分析法等实验；针对色谱分析开设了气相色谱和液相色谱分析等实验，共开设了16个实验。

The results show that the atomic population is time-independent provided that the atoms are in |β11〉 state. For the other three Bell states, there will appear the periodical collapse revival of atomic populationif the initial mean photon number reaches some special values. With the increase of the initial mean photon number, the oscillation frequency of the time-evolution of atomic population increases correspondingly, and the amplitude decreases. The degree of the entanglement of the two-mode entangled coherent field has no

结果表明，当双原子体系的初态为|β11〉时，原子布居均不随时间变化；当双原子体系的初态为|β00〉，|β01〉或|β10〉且初始平均光子数达到一定值时，演化特性呈现周期性的崩塌-回复效应，并随初始光子数的增加，其演化曲线的振荡频率增大，振幅减小；双模纠缠相干光场的纠缠程度不影响Rabi振荡频率，但对振幅影响显著； Kerr介质与光场耦合系数达到一定值时，对Rabi振荡频率和幅度及原子布居的崩塌-回复周期产生强烈影响。

This invention relates to a method and device for generating cold atomic beam. Said method includes heating hot atom source in vacuum chamber to form atomic saturated vapor pressure atmosphere, cooling hot atom by three-D MOT to below 200uk and trapped to form cold atomic cloud, by the quarter wave plate reflection mirror in MOT the laser radiation pressure being unbalanced to make cold atom emitting along said direction, four tape arranged straight line set with contrary current direction is set in atom beam emission direction, which makes the atom emitted to forward to obtain cold atom beam with low speed, large flux and small transverse speed, laser beam vertical with atom beam set in the direction of cold atom emitting for atom beam state preparation to realize state concordant emitted cold atom beam.

本发明涉及一种冷原子束产生方法和装置，该方法包括在抽真空的真空室内，加热热原子源，在真空室中形成相应的原子饱和蒸汽压气氛；采用三维MOT对热原子进行冷却，冷却到200μk以下，并被捕获形成冷原子云团；通过三维MOT中开小孔的四分之一波片反射镜，而使得在该方向上激光辐射压力不平衡，使冷原子沿此方向出射；在冷原子束出射方向上，还置有载有彼此电流方向相反的四根成锥形排列的直导线，从而原子出射时将在磁场的作用下，不会沿横向膨胀而向前射出；便得到了出射速度低的、通量较大的、横向速度非常小的连续冷原子束；同时在冷原子束的出射方向上，设置有与原子束垂直的激光束，用于原子束的态制备，实现态一致的出射冷原子束。

The radial distribution function , atomic energy, atomic volume, atomic coordination numbers and hydrostatic stress are analyzed at the relaxation state.

零温弛豫态下，分析了纳米多晶铜的径向分布函数、原子能量、原子体积、原子配位数、以及原子静水压力。

The larger the atomic volume construction,the higher the stability of intermediate phase.There exist 4 eutectic systems with 9 eutectic reactions in Au-RE systems.A criterion exists between the reduced eutectic temperatureand the atomic radiiof RE metals:the Teu/TA values dedine linearly with the increase of rR Value and keep essentially a constant when rRE values are larger than 0.175nm (namely the atomic size differences between RE and Au are larger than 21%).

Au-RE系中存在4个共晶系9种共晶反应，简约共晶温度与RE原子尺寸之间存在一个判据：简约共晶温度随RE原子半径增大呈线性下降，但当RE原子半径达到约0.175nm(即与Au相对尺寸差21％)时，更大原子尺寸差不再影响液相线和共晶温度下降，简约共晶温度保持常数。

Nature, most elements have two or more isotopes, the same kinds of elements in the quality of the various isotopes of different, but the types and proportion constant (except for radioactive elements). In 1961, the carbon content of the most abundant in nature, a kind of isotope, carbon-12 atom of a quantity and quality of C as a 12 mass units to it as "benchmarks" for all isotopes of an element according to the average abundance The ratio of the benchmark is the atomic weight of this non-prime, that is listed in the periodic table of atomic weights.

自然界中大多数元素都有两种或更多的同位素，同种元素的各同位素质量不同，但其种类和比例是恒定的。1961年，把碳在自然界含量最丰富的一种同位素，碳12的一个原子的质C量定为12个质量单位，把它作为"基准"，某种元素的所有同位素按丰度的平均值与基准之比，就是这种无素的原子量，即元素周期表列出的原子量。

Products Introduction: Silicon cycle, the department of the first type IV elements, is a non-metallic element, atomic number 14, atomic weight 28.80; density of 2.33g/m3; melting point of 1410 ℃; boiling point of 2355 ℃; resistively for 2140Ω.M; includes two types of stereotypes and crystal allotrope.

硅周期系第 IV 类元素，是非金属元素，原子序数14，原子量为28.80；密度为2.33g /m3；熔点为1410℃；沸点为2355℃；电阻率为2140Ω。m ；有无定型和晶体两种同素异形体。

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。

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 shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。