From the mapping relationship between information vector matrix and relative vectors , rough approximation , attribute relative reductions and selecting optimal attribute reductions set algorithms based on binary vector matrix were proposed 摘要根據(jù)向量矩陣與向量之間的映射關(guān)系,研究了基于二元向量矩陣算法的粗糙近似、屬性約簡以及最優(yōu)屬性約簡集的獲取。