Efficient Localization based on Imprecise Anchors in RFID System Scenario NATIONAL 8ETIE国 GEOGRAPHIC Context-aware. location-based Service Super Markets Libraries Xiang Lu,Lei Xie,Yafeng Yin,Wei Wang,Baoliu Ye,Sanglu Lu State Key Laboratory for Novel Software Technology,Nanjing University,ChinaScenario Xiang Lu, Lei Xie, Yafeng Yin, Wei Wang, Baoliu Ye, Sanglu Lu State Key Laboratory for Novel Software Technology, Nanjing University, China Efficient Localization based on Imprecise Anchors in RFID System Super Markets Libraries Context-aware, location-based Service