查询词典 planetary electron

In theory, firstly, the numerical simulation methods, such as the boundary element method, the finite difference method and the finite element method, were utilized to calculate the distribution of electric field intensity and potential of the electron-gun system, the focusing system and the whole equipment, respectively. Then, the trajectories of the electron-beam were traced by using of the Runge-Kutta method and the Monte-Carlo method associatively. The point spread function was also calculated.

在理论分析中，先后采用边界元方法、差分方法、有限元方法等科学数值计算方法，编制程序，对X射线源的电子枪发射系统、聚焦系统以及发射系统与聚焦系统的组合系统等的电场分布进行了严格的计算，在准确求得各系统电场内各个剖分点的电场场强、偏导数等参量的基础上，采用蒙特-卡罗模拟方法和不等距龙格-库塔方法相结合，追踪由LaB_6单晶阴极表面发射出的大量电子束在电场内的运动轨迹，求出点扩展函数，并根据点扩展函数的优劣，反复调节、大量计算对比，挑选出X射线源最佳的电极结构及其组合。

The main task of this project is to design a bus adapter, which will be one part of the aviation electron system, to connect the embedded aviate route controller to the aviation electron bus.

该项目的主要任务是通过设计一总线适配器将嵌入式航路控制器接入航电总线，使之成为航空电子系统的一部分。

In the Presence of uncoupling reagents water stress had little effect on the photosynthetic electron transport in mesophyll cells of Iwpoea batatas, but in the absence of uncoupling reagents it promoted the electron transport and displayed pronounced uncoupling effect.

在有解偶联剂存在时，水分胁迫对叶肉细胞的光合电子传递没有影响，但在无解偶联剂存在下，水分胁迫促进了甘薯叶肉细胞的光合电子传递，表现出明显的解偶联效应。

The results have indicated that the introduction of electron-donating methoxy or electron-withdrawing cyano-group at the 7-position of 3-phenylcoumarins caused a bathochromic shift for both absorption and fluorescence spectra. The phenyl group at the 4-position derivative has a hypsochromic shift for both absorption and fluorescence spectra.

结果发现，在3-苯基香豆素的7-位引入给电子基团甲氧基或吸电子基团氰基均使它们的吸收光谱和荧光光谱产生红移，4-苯基香豆素的衍生物的吸收光谱和荧光光谱均产生蓝移。3-苯基香豆素衍生物与4-苯基香豆素的衍生物的基态和激发态的电子转移方向相反。

Owing to the inclusion complexation, the benzoquinone as the electron acceptor of reduced GOD in the enzyme-containing polymer membrane has higher concentration, thereby faciliating the electron transfer of the immobilized enzyme.

由于分子包合作用，作为电子受体的苯醌在含酶的环糊精聚合物膜中具有较高的浓度，从而加速了固定化酶的电子传递。

The bimolecular electron transfer rate constants demonstrate a marked dependence on ionic strength. This indicates that the electrostatic interaction plays significant role in the electron transfer.

电子传递速率常数的对数与离子强度符合指数关系，表明静电作用在电子传递过程中起着较重要的作用。

In order to solve the backward electron transfer problem, 9 kinds of rhenium bipyridyl photosensitive dyes with different electron donating groups on the p or m-position of the pyridine rings, 2 kinds of rhenium bipyridyl and 2 kinds of ruthenium tris-bipyridyl photosensitive dyes with two tyrosine ethyl ester groups on the bipyridyl rings were designed and synthesized.

本文针对该类太阳能电池中存在的电子回传问题，设计合成了在吡啶配体的间位和对位带有不同供电基团的9种铼联吡啶光敏染料，在联吡啶配体上带有两个酪氨酸基团的2种铼联吡啶和2种钌三联吡啶光敏染料。

The speed of electrophilic addition reaction of Alkene is inferenced greatly by the electron-withdrawing group or electron-releasing group on C=C of Alkene And the main addition product is decided by stability of carbonium ion.

烯烃C=C上连有供电子基和吸电子基时，对于烯烃亲电加成反应速度的影响是很大的。加成产物是由碳正离子中间体的稳定性来决定。

The central carbonium ion is an important center of interaction between the dye and GaP. The oxygen atom with one lone pair of electron on the GaP surface acts as the electron donor.

碱性品红分子的中央碳正离子与GaP表面具有孤对电子的氧原子形成配位键。

For usual acid"s leaching out efficiency is low for Gallium in fly ash, we did some analysis on fly ash which drew out or not through X-ray, electron probe, and scan electron microscopy chlorhydric acid .And those analysis gave us rational explain that the low leaching out efficiency for Gallium from fly ash with chlorhydric acid"s draw out juice.

针对常规酸对粉煤灰中镓浸出率偏低这一现象，我们通过X-射线、电子探针和扫描电镜对盐酸浸出反应前后粉煤灰的分析，对盐酸浸出粉煤灰中镓的浸出率低作出了合理的解释。

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。