School of Computer Science and Technology,Harbin Institute of Technology,Weihai,264209,China;
College of Information Engineering,Sanming University,365004,Sanming,China;
Fujian Province University Key Lab for Industry Big Data Analysis and Application,Fujian,China;
College of Information Engineering,Qingdao Binhai University,Qingdao,China;
Jiangsu Province Wireless Sensing System Application Engneering Technology Research and Development Centre,China;
School of Engineering,Manukau Institute of Technology,Auckland,2241,New Zealand;
User profiles; multi-source; multi-task learning; social network;