In the ultra high frequency system, the frequency compounder section of the transmitting frequency is operated with DDS/PLL technology.

在甚高频系统中，射频的的频率合成器部分采用DDS/PLL技术。

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MUOS will augment and replace the legacy Ultra High Frequency (UHF) Follow-On system (UFO) providing assured communications, including simultaneous voice, video and data, for mobile warfighters.

MUOS将扩展和取代传统的超高频(UHF)后续通信卫星(ufo)，为移动士兵提供通信保障，包括同步语音、视频和数据。

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Researching the high performance transporting, metering and dropping system to boost the drop frequency has been a hotspot of farming machine.

研究开发性能良好的输送、分苗、落苗系统，提高投钵频率已成为农业机械领域一个热点问题。

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The SEC has already proposed a number of changes designed to address their growing influence, including extra restrictions on broker-dealers that provide direct market access to high frequency traders, a trader tracking system for large traders, circuit breakers that would slow trading in individual stocks if they fall more than 10%, and new rules for off-exchange trading venues.

FORBES: SEC Wants Real Time Trading Data

S. (Global Vibration System) technology, allowing for the high-frequency vibrations from the motors to be felt not only on the wheel itself, but also throughout the cockpit's entire steering column and pedal set.

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And Project SHIELD provides fidelity and dynamic range never before available on a portable device, through its custom, bass reflex, tuned port audio system -- with twice the low-frequency output of high-end laptops.

ENGADGET: NVIDIA unveils Project Shield, a Tegra 4-powered Android gaming handheld