查询词典 Bohr

Quantum dots are a kind of semiconductor nanopaticles with the radius equal to or less than the exciton Bohr radius. They have tremendous potential in the field of biology and medicine because of their unique and tunable optical properties (broad excitation spectrum, narrow emission spectrum, precise tunability of their emission peak and negligible bleaching, etc) as new fluoresent probes.

量子点是半径小于或接近于激子玻尔半径的一类半导体纳米晶，作为一种新型的荧光标记物，其独特和可调谐的光学特性（宽的激发光谱、窄的发射光谱、可精确调谐的发射波长以及可忽略的光漂白等）使其在生物和医学方面显示出巨大的应用潜力。

The small band gap and the large Bohr radius of lead chalcogenides enable unique optical, electrical, and chemical properties, presenting this family of materials as a good candidate for potential applications in solar cells, thermoelectric devices, telecommunication, field effect transistors and biological imaging.

IV-VI族铅的硫属化合物半导体纳米材料，由于他们较小的能带间隙和较大的激子波尔半径，这类材料在太阳能电池，热电器件，电子通信，场效应晶体管，生物成像技术上有很广泛的潜在应用价值。

We also studied the resonant Raman-scattering in the ZnCdSe/ZnSe QWs with different well width, and found the Raman signal can be only observed in the QWs with width comparable to the Bohr radius of the excitons in the ZnCdSe QWs, which implies the strong correlation between the electrophonon interaction and the quantum confinement effect.

通过采用不同宽度的量子阱，我们研究了ZnCdSe/ZnSe单量子阱的共振喇曼散射特性，发现共振喇曼散射信号只在阱宽与激子玻尔半径相当的单量子阱中（5nm和2.5nm）才能观察到。

The 1s electron cloud in hydrogen atom has the largest probability density distribution around a spherical shell with Bohr radius a 0. The author thinks the probability density distribution and electron cloud belong in fact,to statistic regularity, and imply a macro-time scale is used, therefore in hydrogen molecule the product of energy and time is far larger than Planck Constant.

氢原子中 1s电子的电子云呈球形，电子的最大几率密度分布出现在玻尔半径a0 的球壳内，认为几率密度分布及电子云属统计规律，意味着已经使用了宏观时标，这样就使氢分子体系中能量和时间的作用量远大于普郎克常数；根据电子云的交叠，用经典力学计算了基态氢分子的结构常数，获得键长、键能及力常数的表达式分别为Re=2a0 ，De=ze/4 2a0 ，k=ze/2 2a30 ，采用原子单位 a 。u 。

The results indicate, the ground state energy increased quickly as the decrease of ZnO QD radius, when the radius decreased to the effective Bohr radius of ZnO exciton (aB=1.8nm), the ground state energy is 488meV higher than the conduction band bottom, about 8 times of binding energy of ZnO free exciton. When the radius is larger, the ground state energy inclined to a constant (under conductor bottom about 65meV), approximate the binding energy of the exciton in bulk crystal ZnO.

计算结果表明，激子的基态能随着粒径的减小而迅速增大，当粒径减小至ZnO的激子玻尔半径时，其基态能高出体相ZnO禁带宽度488meV，约为ZnO自由激子结合能的8倍，而当粒径较大时，其基态能比ZnO导带底低65meV，与ZnO自由激子的结合能基本一致。

Bohr developed his theory using three concepts, all of which were at variance with the classical theories.

玻尔在发展他的学说时用了三个概念，都是与经典理论相矛盾的。

The Bohr theory, with its strong flavor of elementary classical mechanics, formed an important bridge between classical physics and present-day atomic theory.

玻尔理论具有强烈的初等古典力学的气味，这就构成了古典物理和近代原子理论间的一座重要的桥梁。

To understand the atmosphere of the time, one must realize the extraordinary predicament physics found itself in, shortly after Niels Bohr published his theory of Atomic Structure.

要了解当时的气氛，必须知道自从1913年玻尔提出了他的原子模型以后，物理学即进入了一个非常时代：牛顿

The Bohr theory , with its strong flavor of elementary classical mechanics, formed an import bridge between classical physics and present-day atomic theory .

玻尔理论具有强烈的初等古典力学的气味，这就构成了古典物理和近代原子理论间的一座重要的桥梁。

This paper analysis the interaction inside of two-electron atomic system by using Bohr Theory and the method of theoretical analysis, and presents a quantitative analysis, and discusses the feature and characteristic of energy level and spectral about two-electron atomic, based on the experimental data offered by China Basic Science Data Center.

运用玻尔理论，通过理论分析的方法，分析双电子原子体系内部间的相互作用，并根据中国基础科学数据中心提供的实验数据对双电子能级和跃迁的光谱作了定量计算，讨论分析了双电子原子能级和光谱的性质和特点。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。