查询词典 planar graph

Application of 1, 1'-Planar chiral P, N -ligands into palladium-catalyzed allylic substitution

1， 1'-平面手性二茂铁膦氮配体在钯催化烯丙基取代反应中的应用

When ligands with only planar chirality were used in the two model reactions (allylic alkylation and amination), comparatively high enantioselectivities were obtained.

令人鼓舞的是设计合成的只具有平面手性的膦氮配体，也可以取得中等到良好的对映选择性。

This thesis focused mainly on studying the role of planar chirality in asymmetric catalysis, synthesizing novel ferrocene ligands and applying them to palladium-catalyzed allylic substitution reactions.

本论文主要是研究二茂铁平面手性在不对称催化反应中的作用，设计合成新型二茂铁配体及其在钯催化烯丙基取代反应中的应用。

The results showed that high-energy ball milling led to a drop in the crystallinity of the CMs and a decrease in the size of graphite planar micro-crystals,implying a higher structural amorphism caused by the high energy ball milling.

结果表明，高能球磨处理导致中间相的结晶有序度下降，微晶石墨平面尺寸减小，层间间距增加，说明高能球磨处理促使中间相向无定形结构转变。

Anaglyph space can be three-dimensional structure of the three-dimensional shape, can be both a planar shape; can be attached to a carrier, but also relatively independent existence.

浮雕的空间构造可以是三维的立体形态，也可以兼备某种平面形态；既可以依附于某种载体，又可相对独立地存在。

Mathematics A planar unit of angular measure equal in magnitude to !

度，度数：在量值上等于旋转一周的！

This is mainly due to that pyrene ligand has better planar and aromatic character than anthracene.

这主要是由于配体芘比蒽具有更好的芳香性和平面型，可以使探针Ru-2更好的与DNA结合，使荧光增强。

Moreover, the synchronization of EAN is studied; the result shows that the stochastic networks are more poorly synchronized than their deterministic counterparts. These models can well mimic some real systems. Firstly, two dimensional random Apollonian networks and two dimensional EAN are maximal planar graphs, which may be helpful for designing printed circuits. Secondly, V-HDRAN can be mapped into the Yule process, which was inspired by observations of the statistics of biological taxa. From this perspective, V-HDRAN can find some applications in biological systems. Thirdly, all networks of this type consist of complete graphs; this particularity of the composing units can provide a comprehensive aspect to understand some real-life systems making up of complete graphs, such as movie actor collaboration networks, scientific collaboration networks and networks of company directors.

这些模型可以很好地描述现实系统，其中二维随机阿波罗网络与二维演化的阿波罗网络为最大平面图，这对印刷电路板等现实系统的设计有重要的借鉴作用；变体模型V-HDRAN的构建过程与Nature上发表的关于生物物种的形成过程之间存在一个一一对应的关系，这对生物系统的建模有重要的价值；另外，这类网络均由完全图组成，它们对由完全图组成的电影演员合作网、科学家合作网、公司董事网等由完全图构成的现实网络的建模有重要的理论意义和应用价值。

He began to zoom out the close shots, such as in the artworks about airports and flyovers, the unexpected "inserting" of arcs of upper sides of the plane, the car and the flyover in the close shots is not only a fruit of "accidental gain of daydreams", but also the result of the intentional arrangement of the artist, it disturbs the horizontal composition formed by the existence of the "apparent horizon" and compresses the depth of field in great extent so that the picture turns to be more planar

在一些作品中，尹朝宇有意识地打破"地平线"的固化结构，他开始放大近景，譬如那些有关机场、立交桥等的作品，飞机、汽车、立交桥上沿的弧形等在近景中出人意料地"插入"，不仅是一种"迁想妙得"的成果，也是画家有意味地刻意摆放，它们打乱了画面因为"地平线"的存在而形成的横向平行的构成，并在很大程度上压缩了景深以至于画面变得更为平面化

Planar Archimedean antenna has some advantages as wideband,small volume and good performance in circularly polarizing ,so it has broad appliance prosperity.

平面螺旋宽带天线具有频带较宽、体积较小、圆极化性能较好等特点，应用范围很广。

Continuously improve the production mechanism, to provide customers with better quality products and services.

不断的完善生产机制，给客户提供更优质的产品及服务。

B:Yes, he was the very prize-winner in the court tennis ten years ago?

是的，他是十年前的世界网球冠军。