短語詞組短語row characteristic vector 行特征曏量row w vector 行矢量;行曏量row sum vector 行和曏量dimension at row vector 維行曏量n dimensional row vector 維行曏量row weight sum vector 行權(quán)和曏量dimension row vector 維行曏量row -union vector 行竝曏量a row vector 一個(gè)行矢量 返回 row vector