6LEWIS F L. Smart Environments : Technologies, Protocols, Appli- cations[M]//Wireless Sensor Networks, New York[s. n. ],2004.
7Bhaskar Krishnamachari . An Introduction to Wireless Sensor Net- works[ER/OL]. [2010-08-07]. http://ceng.usc. edu/- bkrish- na/. 2005.
8GONZALEZ G R,ORGANERO M M,KLOOS C D. Early infrastructure of an intemet of things in spaces for learning [C]//Eighth IEEE International Conference on Advanced Lea- rning Technologies. Santander, Cantabria: IEEE, 2008 : 381 - 383.