This work was supported partly by the National Natural Science Foundation of China(Grant Nos.61162016,62072133,U1811264,U1711263,61966009);the Natural Science Foundation of Guangxi Province(2018GXNSFDA281040,2018GXNSFDA281045);the Innovation Project of Guangxi Graduate Education(YCBZ2020062).
Data aggregation has been widely researched to address the privacy concern when data is published,meanwhile,data aggregation only obtains the sum or average in an area.In reality,more fine-grained data brings more val...