School of Computer Science and Engineering Jiangsu University of Science and Technology Zhenjiang China;
School of Computer Science and Engineering Jiangsu University of Science and Technology Zhenjiang China;
School of Computer Science and Engineering Jiangsu University of Science and Technology Zhenjiang China;
School of Computer Science and Engineering Jiangsu University of Science and Technology Zhenjiang China;
School of Computer Science and Engineering Jiangsu University of Science and Technology Zhenjiang China;
Group recommendation; local optimization; social network;