The rough information matrix and its characteristics
HAO Xiu-mei1,2, HUANG Shun-liang3,SHI Kai-quan1
1. Shool of Mathematics and System Sciences, Shandong Univ.;2. Depatement of Statistics and Mathematics, Shandong Finance Institute, Jinan 250014;3. School of Management, Shandong University of Technology, Zibo 255049