查询词典 planetary electron

This protocol could also be used for the selective reduction of the endocyclic double bond of the 3-electron withdrawing group substituted coumarins. This method is clean, mild, and efficient.2 ZrCl_4 / HEH was found to be a selective and efficient reagent combination for the direct reductive amination of electron rich aldehydes and ketones with weakly basic amines after scanning various catalysts such as InCl_3, BiCl_3, CF_3COOH and so on.

图一 1。我们用汉斯酯作为有机还原剂，乙醇为溶剂，实现了4-甲叉基噁嗯唑酮和吡唑酮环外双键的高选择性还原；此外，我们还将这一还原体系用于3-吸电子集团取代-3，4-二氢香豆素环内双键的选择性还原。

Evolvable hardware can improve reliability and usability of electron system especially the electron devices which work chronically in the terrible environment.

演化硬件的实现可大大提高电子系统的可靠性及可用性，对需要在特殊工作环境中长期工作的电路设备具有重大意义。

ABSTRACT In this paper, some problems in harmonic free electron lasers and plasma wave wiggler FELs are investigated. The applications of FEL in material science are discussed in detail. As an example, KrF excimer laser was used to investigate the a-Si: H thin film solar cells instead of the free electron laser.

本论文对适用于应用的谐波自由电子激光和等离子体波泵Wiggler型自由电子激光中的若干问题进行了研究，对自由电子激光在材料科学领域的应用及应用前景进行了详细讨论，并使用KrF准分子激光器代替自由电子激光进行了模拟自由电子激光对α-Si〓H太阳能电池的改性实验。

The structure of spore wall of more than 10 species of the fern Filicales and the structure and development of sporoderm of 7 representative species of Filicales were studied contrastively by Light microscope, scanning electron microscope and transmission electron microscope.

主要采用光镜、扫描电镜和透射电镜对照的方法，对我国产真蕨目10多种真蕨孢子主要类型的壁层结构进行了观察，并对7种典型类型的代表种进行了孢壁结构和发育的研究。

The electron donorability of the electron donor part of the fulgide decreases when cationcomplexes with crown ether, and the intromolecular charge transfereffect reduces.

金属离子较大的电荷密度以及金属离子与冠醚较好的匹配使冠醚俘精酸酐分子内的电荷转移更不易进行，造成了光谱较大的蓝移。

The article simply intrduces the working principle of Scanning Electron Microscope,and dis-cusses the application of Scanning Electron Microscope with EDS in gemmology to the identify gems , synthetic gems and optimizing gems and so on.

本文简要介绍了扫描电子显微镜的工作原理，并结合能谱仪，探讨了扫描电子显微镜在宝石学中鉴定天然宝石与合成宝石及优化宝石等方面的应用。

The products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and thermal gravimetric analysis.

采用X射线衍射仪、傅里叶变换红外光谱仪、扫描电子显微镜、透射电子显微镜和热失重分析仪等对产物的组成、形貌以及热失重情况进行了表征。

Microstructure and ultrastructure of testes of Haliotis diversicolor was studied by light microscope,scanning electron microscope and transmission electron microscope.

通过光镜、扫描与透射电镜技术对杂色鲍精巢的显微及超微结构进行研究。

The comparisons of electron ionization energies, ionic total energies and electron transition energies calculated respectively by More, Faussurier and the relativistic screened hydrogenic models, have been performed and the precisions of these physical quantities verify the preponderance of the relativistic screened model based on the analytical potentials.

与More和Faussurier屏蔽类氢模型比较，在电子电离能、离子总能量和电子跃迁能量的计算结果精度方面，基于解析势的相对论性屏蔽类氢模型占有优势。

In chapter 4, by AREELS, the Generalized Oscillator Strength Density Spectra were measured in the energy region from 56 to 66eV, with the incident energy 2. 5 keV and energy resolution 80 meV, at scattering angles from 0°to 6°, corresponding to the momentum transfer K〓=0.03~2. 01 a. u. The Fano profile parameters f〓 and q for the optically allowed transition 〓(0, 1)〓P°and the optically forbidden transitions 〓(1, 0)〓S〓and 〓(1, 0)〓D〓 were obtained as a function of K〓. With the hyperspherical coordinate wavefunctions, the dynamical correlation are discussed qualitatively. So, a new experimental way to study dynamical electron correlation effect is opened.In chapter 5, the widely used R-matrix theory was introduced. Then, the GOSDS for the optically allowed excitation series (1s〓)〓S〓→〓(0, 1)〓P°(n=2-4) were calculated by this method, and the Fano profile parameters f〓 and q were obtained sequently. So the electron correlation effect can be described by these parameters quantitatively, and the theoretical results were compared with our AREELS experimental results.

在第四章中，实验上，同样使用角分辨的高能量分辨快电子能量损失谱仪，在2.5keV电子入射能量和80meV的能量分辨下，测量了0°到6°散射角下的He原子双电子激发态在56~66eV的广义振子强度密度谱，这种情况，0°~6°对应的动量转移范围K〓=0.03~2.01a.u。，得到了光学允许跃迁的双电子激发态〓（0，1）〓P〓和光学禁戒跃迁的双电子激发态〓（1，0）〓S〓、〓（1，0）〓D〓的Fano线形参数f〓，q等随动量转移变化的曲线；观测到了几个强度很弱、能级很窄的光学允许和禁戒跃迁双电子激发态，用前人准确的理论结果进行了标识；通过比较弱共振〓（1，0）〓S〓和〓（-1，0）〓S〓的强度随动量转移K〓的变化规律，结合超球坐标理论计算的波函数，定性地阐述了在电子碰撞散射过程中它们各自不同的动力学电子关联效应，发展了一套在实验上研究电子关联效应的新方法。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。