查询词典 electron tube

The conversion of the cyclobutanes to the corresponding annulation products was achieved by a reaction sequence of [elimination of HCl in the cyclobutanes-4 electron electrocyclic ring opening-6 electron electrocyclic ring closure-elimination of another HCl molecule] .

这些环丁烷产物向增环产物的转化是经一个[脱除－分子HCl得环丁烯－环丁烯电环开环为丁二烯－6电子电环闭环－脱除另一分子HCl]这一连续反应进行的。

Therefore there exist the so called vacuum fluctuations. In the QED, for example, there exist the effects of zero-point oscillations of photons, the effects of vacuum polarization of electron-positron paris, and so on. They all could result in observable consequences , such as the anomalous magnetic moment of the electron, the spontaneous emission of atoms in excited states, the Lamb shift and the Casimir effect, which have been verfied in experiments.

例如，在量子电动力学中真空中存在着光子的真空零点振动效应，正负电子对的真空极化效应等等，它们都导致可观测的物理效果，如磁矩反常、激发态原子自发辐射、兰姆移动、卡西米尔效应等。

So, the antiparticle of the normal electron is called the positron, as it has a positive charge, but the same mass as the electron.

这样，正常电子的反粒子叫做正电子，如同它有一个阳电荷一样，但是与电子的质量一样。

2 The result of electron microscope cytochemistry stain: The positive production of ACPase was present black lead phosphate deposit with high electron-dense under light microscope, located in cytoplasm or apophysis mainly. Lysosome was located in cytoplasm in the earlier of differentiation, then was present in apophysis with it grew.

4.2 电镜酶细胞化学染色结果：电镜下ACPase阳性产物为电子致密度高的黑色磷酸铅沉淀，主要分布于神经元的胞浆中或突起内，神经元分化的初期，溶酶体集中分布于胞质内，随突起的长出，可见在突起内出现。

The valence electron structure of Fe_2B phase was studied on the basis of Yu's empirical electron theory of solids and molecules.The values of valence electrons on every bond in an atomic coordinate cluster were calculated by the method of bond length difference.

根据固体与分子经验电子理论对Fe_2B相的价电子结构进行了定量分析，通过键距差方法计算了Fe_2B晶体配位团各键上的共价电子数。

To study the effects of factors such as electromagnetic field and electron temperature on the ion extraction characteristics (extraction time, collision loss ratio) in atomic vapor laser isotope separation, 2-D electron-equilibrium model was used to analyze and simulate the ion extraction process.

为研究各因素对原子蒸气激光同位素分离中离子引出特性的影响，采用二维流体理论电子平衡模型分析计算了引出过程中外加恒定电磁场和电子温度等因素对离子引出特性的影响。

ABSTRACT The technique of melting refractory metal with electron beam is widely used in many fields, for example, vacuum coating, electron beam machine and AVLIS (atomic vapor laser isotope separation), etc.

电子枪加热熔化难熔金属技术在众多的领域中得到广泛的应用，例如真空镀膜、金属切割加工和激光原子法分离同位素（Atomic Vapor Laser IsotopeSeparation，缩写为AVLIS）等。

Auger electron spectroscopy, scanning electron microscopy and atomic force microscopy are used to analyze component and surface morphology of the films.

用俄歇电子能谱、扫描电镜和原子力显微镜对薄膜的组成成分和表面形貌进行了分析。

Effect of carbon and nitrogen on microstructure and properties of austenite weld metal were studied by scanning electron microscope, transmission electron microscope and other methods.

采用扫描电镜和透射电镜等分析研究了碳、氮元素对奥氏体焊条熔敷金属组织和性能的影响。

The morphogenesis and some important characteristics in the course of reproduction of two kinds of pathogenic virus of Hemorrhage of Grass Carp, Reovirus and Picornavirus.in fish cell culture were studied by means of electron microscope and electron microscopic autoradiography.

应用电子显微镜和放射自显影术，观察草鱼出血病两种病原病毒——草鱼呼肠孤病毒和草鱼小RNA病毒在鱼类细胞中的形态及增殖过程的一些重要特征。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"