It provides a theoretical basis for harvesting the low-frequency vibration energy in environment and designing self-powered device of sensor network.

为采收环境低频振动能量，实现网络传感器自供电装置提供了设计的理论依据。

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These capabilities are packed into a device barely larger than a USB stick that is self-powered through a monitor and easily fits inside your pocket.

ENGADGET: Dell's Project Ophelia: an Android 4.0 stick that turns any display into a PC