The sole manufacturer with independent intellectual property rights of four-quadrant high voltage variable frequency technology.

荣信公司是国内最早对四象限中压变频技术有自主知识产权并掌握核心技术厂家。

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It introduces a kind of powerful complementary DC and constant voltage power device by using the independent excitation and high frequency PWM wave clipper.

介绍一种利用它激式高频pwm斩波技术完成的大功率直流稳压电源装置。

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Tranfer function independent of frequency for electron micrograph deconvolution is obtained, which improves the resolution of electron micrograph.

对电子显微解卷，得到与频率无关的传递函数，提高了电子显微像的分辨率。

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Then there was the North Yorkshire community school which had turned the Pi into an RFID (radio-frequency identification) reader to measure lap times in their cross-country races, and the London independent school whose pupils had come up with Teacher's Pet, a way of delivering homework via USB sticks plugged into the tiny computer.

BBC: The life of Pi - clever ideas with a tiny computer

The New York Independent System Operator has defined short-term energy storage devices like flywheels and batteries as frequency regulators, allowing them to participate in regulated markets.

FORBES: Energy Storage Critical to Solar Industry