Big Data 7th CCF Conference, BigData 2019, Wuhan, China, September 26-28, 2019, Proceedings - Jin, Hai; Jin, Hai; Lin, Xuemin; Lin, Xuemin; Cheng, Xueqi; Cheng, Xueqi; Shi, Xuanhua; Shi, Xuanhua; Xiao, Nong; Xiao, Nong; Huang, Yihua; Huang, Yihua (Springer Singapore : Imprint: Springer, 2019)