查询词典 spontaneous emission

The major work is as follows: I make the comparing test to check up the two acoustic emission theory's fundamental hypothesis and get that merit and limit of two method, which is help to find the best applying area for two acoustic emission method.

主要完成的工作如下：通过对比试验来验证参数式声发射技术和模态式声发射技术的理论，分析两种声发射技术的优缺点，找到各自最佳的应用范围。

According to conventional field emission theory,the emitted electrons mainly follow the field emission mechanism because of their approximately straight Fowler-Nordheimplots.

样品的Fowler-Nordheim曲线基本为一直线，根据经典场发射理论，可以证实其电子发射机制为场发射。

There are still problems such as reaching nation stardard of formaldehyde emission and mechanical properties, high production costs , technology operation and so on since nation standard on limits of formaldehyde emission of wood panels and finishing products is forcibly carnied out .

自国家新出台人造板及其制品甲醛释放限量标准和强制执行以来，人造板产品始终存在甲醛释放和力学性能达标，和生产过程成本高，工艺操作差等诸多技术问题。

The fluorescence spectra of Eu~(3+) may be used to study the structure ofcompounds.The band shift of Nd~(3+) in its absorption spectra,the red-to-orangeintensity ratio of the Eu~(3+) emission(~5D_0→~7F_2)/(~5D_0→~7F_1)and the yellow-to-blue intensity ratio of the Dy~(3+) emission~4F_(9/2→~6H_(13/2)/~4F(9/2→~6H(15/2)intheir fluorescence spectra may be used to study the degree of covalency of theLn-O bond and its relation with the electronegativity of M in Ln-O-M.

本文介绍了利用 Eu~(3+)的荧光光谱研究化合物的结构；利用 Nd~(3+)的吸收光谱的谱带位移和 Eu~(3+)的荧光光谱的红橙发射强度比(~5D_0→~7F_2)/(~5D_0→~7F_1)和 Dy~(3+)的黄兰比~4F_(9/2→~6H_(13/2)/~4F_(9/2→~6H_(15/2)，了解Ln—O—M中 Ln—O 化学键的共价程度以及 M 的电负性对共价程度的关系；利用吸收光谱、荧光光谱和磁化率研究稀土的价态以及利用磁化率研究化合物的组成。

In compared with acceptor emitters, not only can the emission wavelength be tuned (up to 100 nm of red-shift) by H-bonds, but also much higher emission efficiencies of the H-bonded complexes were induced by reduced aggregation and energy transfer from the OXD donor dendrons.

另外，在使高分子形成高分枝结构之研究上、利用不同含量与不同官能基数目之carbazole单体与茀单体进行聚合，可得一系列高分枝状高分子，能使聚茀共轭高分子产生不同之分枝程度结构，这样方式有效改善分子间聚集之现象并且维持高分子主链良好共轭程度，使得产生之高分子具良好的萤光效率。

In monochromatic CL images, the green emission comes from randomly distributed dots and floccules that occupy almost the whole surface. The blue emission comes from the floccules only.

单色的阴极荧光谱发现绿光发射对应的发光区包括絮状区域和发光点，而蓝光发射对应的发光区仅包含絮状区域。

The visible emission and ultraviolet lasing emission of ZnO have been the subject of much research up to now.

目前，有关氧化锌的光学特性研究部分集中在氧化锌的紫外激光发射和可见发光机制方面。

Up to now, the visible emission and ultraviolet lasing emission of ZnO have been the subject of much research.

ZnO的辐射波长具有比GaN的蓝光发射更短，对增加光记录密度具有重要意义。

Up to now, the visible emission and ultraviolet lasing emission of ZnO have been the subject of much research.

目前，有关氧化锌研究部分集中在氧化锌的紫外激光发射和可见发光机制方面。

The sources of pollution are as follows, 1,feces discharged from public washroom emit an unbearable naucious odor; 2、water discharged from factories is black and odorous, covered with floating waste 3、air emission from factories smells pungent and spreads to every corner,4、air emission from fertilizer factories contains dust,lead, and coal ash, and other particles harmful to health 5、grasslands and lawns in parks are covered with litters which are unhygenic and unsightly.

造成环境污染的污染源是：1、公共厕所排出的粪便散发出难闻的气味，让人恶心。2、工厂排出的废水又黑又臭，还浮着一些秽物。3、工厂排出的废气很刺鼻，会散发到小镇的各个角落。4、化肥厂排出的气体中含有粉尘、铅、煤灰等对人体有害的物质。5、公园的草坪上常有游人丢弃的垃圾，既不卫生，又影响市容。

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。