About author:GUI Qing-ming（1960－）,male,native of Wujiang,Jiangsu,a professor of Zhengzhou Information Engineering University,engages in the theory and application of statistics；DUAN Qing-tang（1958－）,male,native of Weihui,Henan,an associate professor of Zhengzhou College of Light Industry,engages in the theory and application of statistics；ZHOU Qiaoyun（1966－）,female,native of Wenxian,Henan,a lecturer of Henan Institute of Finance Management,engages in the theory and application of mathematics；GUO Jian-feng（1972－）,male,native of Changge,Henan,a lecturer of Zhengzhou Information Engineering University,engages in the theory and application of statistics．
Supported by:
Supported by National Science Fund for Distinguished Young Scholars（49825107）；Supported by Natural Science Foundation of China（40074006）；Supported by Natural Science Foundation of Henan Province（004051300）
GUI Qing-ming, DUAN Qing-tang, ZHOU Qiao-yun, GUO Jian-feng. A New Class of Biased Linear Estimators in Deficient-rank Linear Models[J]. Chinese Quarterly Journal of Mathematics, 2001, 16(1): 71-78.
