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Connected to the Web via a light bulb(九年级阅读)  

2013-10-28 13:27:14|  分类: 九年级阅读 |  标签: |举报 |字号 订阅

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复旦大学的研究人员成功利用灯光产生无线网络。
        Researchers at Fudan University havesuccessfully connected computers to theInternet via an LED(发光二极管)light bulb.
  The researchers used a one-watt(1瓦的)bulb in their experiments to connect four PCs to the Web.The wireless technology is called Li-Fi and is based on the use of light as a carrier,while Wi-Fi uses traditional radio frequencies(无线射频),according to lead researcher Chi Nan,an information technology professor at Fudan.Connected to the Web via a light bulb(九年级阅读) - 称子英语 - 孙广趁教育教学工作室
 
  A light bulb with microchips inside it can produce data rates much faster than the average broadband connection in China,said Chi.
  The Li-Fi technology is low-cost and efficient,while the current wireless technology equipment is expensive and low in efficiency,said the researcher.
  Mobile phones depend on base stations(基站)to connect to wireless networks.Millions of base stations have been built around the world to strengthen the signal,but most of the energy is used on their cooling systems,Chi explained.
  In comparison,the number of light bulbs that can be used is limitless.“Wherever there is an LED light bulb,there is an Internet signal,”said Chi.“Turn off the light,and the signal is gone.”
  But there is still a long way to go before Li-Fi becomes a commercial success,she pointed out.Scientists are still experimenting with some key parts of the Li-Fi technology.
  The term Li-Fi was first used by German scientist Harald Haas,who first developed the technology.China’s latest advance will be on show at next month’s China International Industry Fair(中国国际工业博览会)in Shanghai.
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