基于RFID应用的综合性数据清洗策略.pdfVIP

第30 卷第1期 东 北 大 学 学 报 ( 自 然 科 学 版 ) Vol130, No. 1 200 9 年 1 月 Journal of Northeastern U niversity( Natural cience) Jan. 2 0 0 9 RFID 谷 峪, 李晓静, 吕雁飞, 于 戈 ( , 110004) : RFID , RFID , # RFID , # , , RFID ; , , , # # : RFID ; ; ; ; : TP 311 : A : 1005-3026(2009) 01-0034-04 Integrated Data Cleaning Strategy Based on RFID Applications G U Yu, LI X iao-j ing , L B Yan-f ei, Y U Ge ( chool of Information cience Engineering, Northeastern University, henyang 110004, China. Correspondent: GU Yu, E-mail: gy neu @ 163. com) - Abstract: Numerous unreliable, redundant and time-stamp disordered data take place in RFID applications. How ever, the existing techniques of RFID data cleaning are mainly for the single- type errors and not adaptable to the complicated errors. An integrated data cleaning mechanism is therefore proposed to provide the accuracy, conciseness and sequentiality for RFID data. The mechanism is composed of local filter and global filter. The local one is used to process the data received by single reader and sequence them in accordance to time-stamp w ith time delayed, then the false-positives are deleted through corresponding constraints according to different distributions of RFID data stream. On the other hand, the global one is used to process the data from multiple readers, w here both the false negatives or positives are filled in or deleted, respectively, considering spatio-temporal correlation of tag readings w ith constraints set up to cancel redundant data. Experimental results sho