3Lonel M Ni,LANDMAC.Indoor Location Sensing Using Active RFID[C].IEEE International Conference in Pervasive Computing and Communications 2003 (IEEE Percom 2003),Dallas:TX,USA,2003.
4Roy Want.Enabling Ubiquitous Sensing with RFID[J].Computer,2004,37(4):84-86.
5R E Bellman,S E Dreyfus.Applied Dynamic Programming[M].Princeton:Princeton University,1962.