查询词典 spontaneous emission

Under an appropriate condition, the squeezed vacuum field can trap the two atoms inri.An analytical expression of emission spectrum for three-level atom interacted with two-mode cavity field is given. The effects of the initial state of system on the emission spectrum for three-level atom are explored.

我们给出了好腔中与双模腔场相互作用的三能级原子发射谱的一般表达式，探讨了系统初态对三能级原子发射谱的影响，阐明了只有原子和双模驱动场初始时刻均处于相干叠加态，原子不同跃迁通道间的量子干涉才使得原子发射谱呈现相位敏感性。

The basic components of the cost of SO2 emission, such as coal mix, desulphurization, discharge fee, emission allowance trade, and equivalent price with externality of electricity generation have been discussed and analyzed in detail.

本文系统地提出了燃煤发电厂SO2排放成本和控制方案的计算方法，包括换煤、脱硫、排污缴费、排污交易、环保折价等基本要素，较为全面的反映了电厂SO2排放成本的构成，使SO2控制政策对燃煤发电厂造成的经济影响得到定量体现，实用性好。

Results show that ammonia emission occurred within the first 6 days after fertilizer application, and it was less after the basal dressing and the first top-dressing than after the second top-dressing-N loss through ammonia emission accounted for 0.4%~12% of the total nitrogen applied for the basal and the first top dressings. However for the second top-dressing the percentage was 5.8%, 9.7%, 25.6%, 15.6%, 11.6% during the 2002 rice season, and 27.4%, 26.2%, 30.0%, 35.1%, 27.6% during the 2003 rice season for Treatments LN, OPT, LP, HP and HN, respectively.

结果表明，稻田氨挥发损失主要发生在施肥后6d内，基肥和第一次追肥后各处理氨挥发量占施氮量的0.4%~11.5%，而第二次追肥后氨挥发损失比例较大，对照、低氮、优化、低磷、高磷和高氮处理的氨挥发在2002年稻季分别占施氮量的5.8%、9.7%、25.6%、15.6%和11.6%，在2003年稻季则分别为27.4%、26.2%、30.0%、35.1%和27.6%。

The influence factors of SO2 in tail gas emission are analyzed and adjusted; the effective methods to reduce the content of SO2 in tail gas emission arc summarized from the aspects such as how to improve the conversion rate of sulfur, enhance tail gas hydrogenation effects and ensure the normal operation of the tail gas absorption unit.

通过从如何提高硫磺回收率、增加尾气加氢效果以及保证尾气吸收单元的正常运行等方面入手，对影响尾气SO2排放的各个因素进行分析调整，总结出了降低尾气排烟SO2含量的有效方法。

Based on exchange principle, by using self-developed software,the compensation sound wave logging can be realized with the results from single-emission and double-receiving logging equipment the same as that from double-emission and double-receiving.

对老式的单发双收煤田测井仪，利用互换原理，通过自行开发编制的软件，以实现与双发双收效果相同，结果一致的补偿声波测井，并通过几个孔的资料对比，达到满意效果。

Fluorescence emission spectra and UV absorb spectra analysis have been undertaken to test the influence of solvent polarity on the lowest excited singlet state of the tertiary amines. The absorption maxima were red-shafted slightly, and the emission maxima were red-shafted strongly, which showed all of the three compounds were found to be essentiallyππ* in character, which makes for the formation of triplet-exciplex state and the subsequent reactions,?known as photo-reduction and hydrogen-abstraction.

本文借助光谱检测的手段测试了新合成的增感剂的光物理化学性能，利用荧光发射光谱和紫外吸收光谱测试了溶剂极性对叔胺的最低激发单重态的影响，实验结果表明叔胺的紫外最大吸收波长随溶剂极性的增强产生轻微的红移，荧光最大发射波长随溶剂极性的增强产生明显的红移，表明三种叔胺的最低激发单重态具有ππ*跃迁的特性，这对于激态复合物的生成以及其后的光致还原反应和提氢反应的发生都非常有利。

Erbium-doped glass showing the wider 1.5-μm emission band is reported in a novel oxide system TeO2-WOa-Nb2O5 and their thermal stability and optical properties such as absorption, emission spectra, crosssections and fluorescence lifetime were investigated.

[1]绍兴托普信息职业技术学院基础学部，浙江绍兴312000 [2]杭州师范学院理学院物理系，浙江杭州310036 [3]宁波大学信息科学与工程学院，浙江宁波315211制备了一系列碲铌酸盐玻璃85TeO2-（15 -x）Nb2O5-xB2O3-1%Er2O3（TNBx=0， 3， 6， 9， 12， 15）。根据Judd-Ofelt和McCumber理论，讨论和分析了B2O3含量对掺铒碲铌酸盐玻璃热稳定性及光谱性质影响。

It indicates that the theory of monoatomic layer can't explain perfectly emission mechanism of La2O3-Mo cathode;the excess active lanthanum is crucial element to the improvement of thermionic emission.

标 签 激光技术热电子发射发射机制脉冲激光沉积薄膜 laser technique thermionic emission emission mechanism pulse laser deposition thin film

Based on the wavelet transformation and the theory of modal acoustic emission,the dispersion of guided wave propagated in thin plate was investigated by acoustic emission experiment.

基于小波变换和模态声发射理论，通过模态声发射试验的方法确定了管道中导波传播的频散特性。

Especially in the NIR region,the luminescent properties are special:the emission spectra have difference from the theoretical values and some reported complexes,that is,the characteristic f-f emission bands of Ln~(3+) ions present obvious shifts,broad and splittings.

特别是在近红外区的发光具有特殊性；得到了一些与理论值及文献报道相比较有明显差异的发射光谱，即Ln~(3+)的特征f-f发射带产生了明显的位移、加宽或劈裂。

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。