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Under the background of High Power Microwave technology, a novel family of waveguides for high power microwave transmission is proposed. Some other new types of guided wave structures formed by some classical geometrical curves are also explored in this dissertation.

在高功率微波技术日益得到重视的背景下，本文提出了一种新的大功率导波结构——五边形波导族，并对利用经典几何曲线构成的几种导波结构作了探索。

Furthermore, the geometrical ending-profile of an expansion chamber has an influence on both frequency period and amplitude of TL. The appropriate offset of inlet and outlet of an expansion muffler can increase its working frequency range. The findings presented in this paper can be used as a design guideline for a high performance muffler.

结果表明，扩张室为圆形截面的消声器性能优于椭圆形和矩形截面消声器；扩张室端部形状不仅影响消声器传递损失的大小，还影响到传递损失的变化周期；当进出气管之一与扩张室轴线偏离一定距离时，可有效地提高消声器的消声频率，改善消声性能。

Resorting to the Roberts-Chebyshev theorem,we replace the two cranks of a crank-rocker cognate mechanism with a double bar,which is required to satisfy certain geometrical and motion conditions,and we change the mechanism thus reformed into a geared five-bar mechanism so that one of its links can fully rotate with the link connected with it.

借助于Roberts-Chebyshev定理，将曲柄摇杆轨迹同源机构的两曲柄分别用一双杆组代替，并要求双杆组满足一定的几何尺寸条件和运动条件，使变形后的机构为齿轮五杆机构，且满足机构的一个连架杆以及与其相连的连杆能够整周转动。

Compagnie 111's French choreographer Aurelien Bory traveled all the way to Dalian, China to compose a visual tale in seven boards, a poem made from seven geometrical metaphors based on the tangram game.

舞团的法籍编舞家 Aurelien Bory 远赴中国的大连，目的是要在七块板上谱写一个视觉故事，一首以七巧板为基础，由七个几何学的比喻组成的诗歌。

A man cannot tell whether Apelles, or Albert Durer, were the more trifler; whereof the one, would make a personage by geometrical proportions; the other, by taking the best parts out of divers faces, to make one excellent.

这是一种奇妙的美，曾经有两位画家――阿皮雷斯和丢勒滑稽地认为，可以按照几何比例，或者通过摄取不同人身上最美的特点，加以合成的方法，画出最完美的人像。

A man cannot tell whether Apelles, or Albert Durer, were the more trifler; whereof the one, would make a personage by geometrical proportions; the other, by taking the best parts out of divers faces, to make one excellent.

曾经有两位画家――阿皮雷斯和丢勒滑稽地认为，可以按照几何比例，或者通过摄取不同人身上最美的特点，加以合成的方法，画出最完美的人像。注意，注意力集中

A man cannot tell, whether Apelles, or Albert Durer, were the more trifler: whereof the one would make a personage by geometrical proportions: the other, by taking the best parts out of divers faces, to make one excellent.

再拿教育来说，培根一生从未当过教员，他也没有从事过任何真正的教育实践，然而，西方的一些教育家们却认为&他对教育思想所产生的影响比任何或全部教育家的影响更大&。

A man cannot tell whether Apelles, or Albert Durer, were the more trifler; whereof the one, would make a personage by geometrical proportions; the other, by taking the best parts out of divers faces, to make one excellent.

有些老人显得很可爱，因为他们的作风优雅而美。

The previous researches have been done experiments mostly in the Water tank. In order to simulate turbulence of flow in river and research its characteristics, the characteristics of turbulence are studied by experiments in the water channel with ADV technique. The research results indicate that R.M.S. velocity linearly relates to the oscillating-grid frequency; R.M.S. velocity decays by power exponent relates to the distance from the grid midplane; and the relationship between the geometrical factors and the free movement space of water is direct proportion.

以往研究大都在水箱中对振动格栅紊流特性进行实验研究，为能模拟天然河道中的紊流，研究天然河道中紊流特性，利用ADV技术在水槽中对振动格栅紊流进行了实验研究研究结果表明：均方根速度与格栅振动频率成线性关系；均方根速度与距格栅中平面的距离成幂指数关系衰减；几何系数与水的自由运动空间成正比关系。

What is ironic is that latent underneath this model of the city you still see the major geometrical figures, the attempt at a degree of coherence, strangely Piranesian forms and organization, but without any evidence of the urban condition that Piranesi suggested or imagined.

尽管在这篇文章中，它正好表现为巴黎的新城地带，但它同时也可以是多伦多，东京，汉城或新加坡的一部分。

Some of them were ligated to the plasmid vector pCR 2.1 andsequenced,respectively.

将所获DNA片段克隆到pCR2.1载体进行测序，并与基因组数据库进行同源性比较。

Thinking since Google owns Blogger, I would be able to escalate this issue to the support team.

自谷歌的思考拥有Blogger的，我将能够缓解这一问题的支持团队。