There's a transmitter that sends the information to a receiver, one that's either clipped onto an iPod nano or built into the second-generation iPod touch.
Nano-TiO_2 photocatalyst can photocatalytically oxidize most of pollutants, especially volatile organic compounds (VOCs) under UV light illumination without second pollution.
纳米二氧化钛光催化剂在紫外光照射下，能将绝大多数污染物彻底氧化分解，且不产生二次污染。
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For the generation of nano-second width pulse, a design is developed by using MOSFET switch. The results of simulation and circuit experiment show the feasibility of the design.