Iintroduction  Someexamplesinwhichuncertaindatamanagementtechniquesarerelevantareasfollows:  theuncertaintymaybearesultofthelimitationoftheunderlyingequipment.Suchassensornetwork,noise  Inmanycasessuchasdemographic(人口)datasets,onlypartiallyaggregateddatasetsareavailablebecauseofpriva