The sixth chapter of the thesis proposes the Z-source ac-ac converter topology, introduces its operating principle, control method, device stress, design method, etc.

本文第六章提出了Z源交流一交流变流器电路拓扑，介绍了其工作原理、控制方法、器件应力，设计方法等。

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When wearing the device, people on the autism spectrum can monitor, communicate and manage their own stress levels before they reach problematic levels.

佩戴这一装置后，自闭症患者可以在达到极限压力前监测、交流并且设法控制压力水平。

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If you have ever had the unfortunate incident of losing a cell phone - maybe accidentally leaving it in a bar - you probably know the frantic stress that can come with searching for the device.

如果你曾经有过丢失手机的不幸遭遇——也许是不小心把手机落在酒吧里——你可能就知道寻找手机时的焦躁不安的心情。

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The device might also reduce stress because patients will know if their fluids are at the right levels.

VOA: standard.2010.06.04

As you can tell, the device itself is encased in a ShockMount layer of protective armor, and we have to stress the "armor" aspect.

ENGADGET: Ridgid Jobsite iPod Radio takes a beating, survives long enough to go on sale (video)

Mr Obama, by contrast, puts greater stress on Iran taking the final, essentially political, step to acquiring a device by bringing together all its technological components.

ECONOMIST: Iran��s nuclear programme