un.数据矩阵
网络 二维;条形码和二维码;二维条码
When the datamatrix is also inaccurate, TLS can give strongly consistent estimation.
当系数矩阵也存在噪声时,总体最小二乘解是参数向量的强一致估计。
Now, technologies and standards such as GS1-128, 2d, Datamatrix barcodes, and Electronic product code (EPC), enable manufacturers to identify products much more precisely than by type alone.
现在的技术和标准,比如gs1 - 128、2d、Datamatrix条形码和Electronic Product Code (EPC),让制造商能够超越类型更加精确地标识产品。