数据采样和数据存储技术的研究.pdf

Classi?ed Index: : for the Master Degree in EngineeringA RESEARCH ON DATA SAMPLING ANDDATA STORAGE TECHNIQUES FORWIRELESS WORKSCandidate:LIU YuSupervisor:Prof. Jianzhong LiAcademic Degree Applied for: Master of puter Science and TechnologyAf?liation:School puter Science andTechnologyDate of Defence:June, 2006Degree-Conferring-Institution: Harbin Institute of TechnologyM?Tó???ó?a????ááá?????Daì??′?a#,?§d?t?kk?a!O?!;ú?&U??íd?.Daì!:?L??g|?Ea?¤?O?2?"§?<?J???±[aY±Y*??n???Ea??§?d3-.??Sú?4?'5"Daì?????ì?A:′/±êa?￥%0§=^r?~?I?'%l?????êa?±????A?Daì!:?3"ù?/±êa?￥%0?A?J?????±/?êa￥+?????{§lêa+n??Y??Daì??"yk?)??Ea!?Sêa;ú?S???n3S?Daì??êa+nEaêH3??ˉK§=§?"y·A??????Cz(X??K1!Ut?ù?t??)?U?"??}á3??Daì??êa+n?-??!￥ú\g·A5"?k§·?la?úaYü????Daì??￥?g·A???Ea§???a^r??°Y??N???a?(?mm)ú??aY(?mm)??{"?L￠???a?úaY?Czó??????t'X§?ón??`???Y?1'?"ùg§·???aêa?Ot-??{§??Uìêa??-?5éaêaS??1?)??{§?3d?:t?Oú￠y?aYaêa;?."?L￠??O??êa-????êatú????tü???t'X"n???ú￠??yy2??J??Ea?±k?JpDaì??êa+n?5Uúü$m?"'c??Daì???êa+n?g·A????aYêa;– I –M?Tó???ó?a????AbstractWireless works are an puting platform consisting of largenumbers of small, inexpensive, wireless “motes” each with limited sensing, compu-tation, storage, munication abilities. works have attracted muchattention worldwide for they offer a technical feasibility to monitor the physical worldin a continuous manner at ?ne granularities. One of the distinguishing characteristicsof works isdata-centric, namely users need only to care about data col-lected by the work; and the existance of individual sensor nodes are safeto be ignored at all. Data-centric stimulates researchers to incorporate methodologiesoriginated from the domain of database and to study works from the per-spective of data engineering. Existing techniques concerning data management works, including data sampling, work data storage, and workquery processing share mon de?ciency in that they lack the capabilities to adaptto work volatiles such as selectivity change and