optimal gain最优增益optimaladj.最理想的；最佳的optimal asymmetric phase-covariant cloning最优非对称相位协变量子克隆optimality of graph-search control strategy图形搜索控制策略的最优性OPTIMALITY CONDITION FOR QUADRATIC DISCRETESYSTEM二次型离散系统的最优化条件optimal partial-match retrieval algorithm design最优部分匹配检索算法设计