This paper discusses the principle of DBS, and proposes some problems application in airborne radar.

本文论述了DBS技术的原理，并提出了在机载雷达应用中的若干问题。

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The pulsed Doppler radar is widely adopted in modern advanced fighting aircrafts as the fire controlling radar, of which some theoretical problems are still waiting for further researching.

脉冲多普勒雷达是先进战斗机上广泛采用的火控攻击雷达，对这种雷达，有些理论问题仍需进一步研究。

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Some problems such as the optimizations of transmitting power and detection precision of differential absorption laser radar have been also approached in the paper.

还探讨了微分吸收激光雷达的发射功率的优化和探测精度的优化等问题。

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And what makes this all the more worrying is that, below the radar screen, America had employment problems long before the recession, particularly for lesser-skilled men.

ECONOMIST: Angst in the United States

Lasting until officials give the all-clear, the modifications are being made to increase safety should there be problems with navigation systems or if radar screens go dark.

CNN: Page 4

On unveiling the package of measures in the government's response to the Stafford Hospital public inquiry, Health Secretary Jeremy Hunt said he was confident the changes would ensure problems on such a scale would not slip under the radar again.

BBC: Are the patients the problem?