4[2]WOLFGANG Le,STEFAN B.Global navigation satellite system.In:Computers and Electronics in Agriculure,New York:American Elsevier Pubishing Co.,2000:4-5.
5于建林.基于HMI/SCADA的高速公路隧道监控系统[D].广州:华南理工大学,2001.
6High - Speed Micro controller Data Book. DALLASE SEMICONDUCTOR.
7ETSI GSM 07.05 : Digital cellular teleeommunications system(Phase 2 + ) ; Use of Data Terminal Equipment - Data Circuit terminating Equipment (DTE - DCE) interlace for Short Message Service (SMS) and Cell Broadcast Service (CBS)(GSM 07.05 version 6.0.0 release 1997).
