查询词典 radius

As their sizes are smaller than the bulk exciton Bohr radius, theyexhibit many unique optical, electrical and chemical properties, giving rise tonumerous potential applications in physics, chemistry, biology and medicine.

由于粒子的尺寸比体相材料激子的波恩半径还小，因此表现出非常独特的光、电和化学性质，在物理，化学，生物，医药等许多方面有着巨大的应用价值。

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。

A variatioual calculation of the energy of the-2s2 is state of helium has been carried out with the use of a wave function of the Hylleraasian typo. The wave function is where s,t u are in units of 4 times the first Bohr radius of hydrogen.

本文以变分法计算2s~21~S态氦原子之能量，所用之波函式，即：=e~(-0.2278s){1-0.17079s-0.063155u-0.013869t~2 +0.010044u~2+0.0064785s~2}上式中之s，t，u均以4倍於氢原子之第一Bohr半径为单位。

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 article respectively gives the radius of bomblet dispersion s equivalent eirtle and determmation and evaluation methods on dispersion homogeneity quotas based on the assumption condition of homogeneous dispersion by means of normal distribution.

基于均匀分布的假定前提并利用正态分布的特性，分别给出了火箭子母弹单发母弹的子弹散布等效圆半径以及散布均匀性的指标确定和评定方法。

The Monte Carlo method is firstly used to simulate random burst of bomblet, the damage radius, amount of bomblet, then draw damaged areas, statistics damage effect, calculate damage efficiency. Lastly calculate the expectation of final damage efficiency of shrapnel through mass random simulation experiments.

文章首先用Monte Carlo法仿真子母弹中子弹的随机落点、于弹毁伤半径和子弹数并绘出子弹毁伤幅员，尔后统计毁伤效果、计算毁伤效能；最后通过大量的随机模拟实验，计算出最终的子母弹的毁伤效能期望。

The inverse radius vector transform is applied in this paper to change the boundless space into a bounded domain,so that the finite element method can be used in computing electromagnetic fields with open boundaries.

目前，在电磁场数值分析中，有限元法得到了广泛的应用，但一般都认为有限元法适用于有界空间中的电磁场问题，这是因为对于无界空间中的电磁场问题，方法的直接应用存在着一定的困难。

Keywords : finite element method; notch root radius; Bridgman equation; stress triaxiality

中文关键词：有限元法；缺口根半径；Bridgman公式；应力三维度

BZZ heavy cantilever crane is scheduled column cantilever crane extension products, the aircraft using the rotary bearing structure with variable cross-section arm, from the kind of up to 2.5-16 meters radius of gyration of 7-12 meters.

BZZ重型悬臂起重机是定柱式悬臂起重机的延伸产品，该机采用了回转支承与变截面臂结构，起种高达2.5-16米，回转半径达7-12米。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷