1. Han Gaolou. The advantages and disadvantage of GPS positioning technology[J]. Shanxi Building, 2010 (2): 56-57. (in Chinese).
2. Wang Shu, Yan Yujije, Hu Fuping et al. Theory and application of the wireless sensor networks[M]. Beijing, Press of Beihang University, 2007. (in Chinese).
3. Ji Jinshui. The application of ZigBee wireless sensornetworking to an industrial automatic monitor system[J]. Industrial Instrumentation and Automation, 2007, (3): 71-76. (in Chinese with English Abstract).
4. Guo Shifu, Ma Shuyuan, Wu Pingdong, et al. Pulse wavemeasurement system based on Zigbee wireless sensor network[J]. Application Research of Computers, 2007, 24(4): 258-260. (In Chinese with English Abstract).
5. Sun Zeyu, Li Meng. Improved Location Algorithm of Coal Mine Monitoring System Based on Wireless Sensor Network[J]. Computer Measurement & Control, 2010, 18(9): 2008-2011. (in Chinese with English Abstract).