基于集值映射的拟划分近似空间中近似算子

吴正江 ¹,王翠红 ²,孙仕保 ¹

Approximation operators based on set-valued mappings in semi-partition approximation space

WU Zheng-jiang ¹,WANG Cui-hong ²,SUN Shi-bao ¹

计算机工程与应用 . 2007, (28): 7 -9 .