Methods: the firstderivation spectrophotometry method was used to determine the content and content uniformity of methylphenidate hydrochloride tablets with the solvent of water.
方法：以水为溶媒用一阶导数光谱法测定盐酸哌甲酯片的含量及含量均匀度。
2
In this paper, we discussed some issues of PLSR. First, Partial Least Squares Regres-sion are given theoretical derivation.
本文就围绕偏最小二乘回归法展开讨论，首先，给出偏最小二乘回归法的理论推导。
3
State equations the derivation of state space models is no different from that of transfer function in that the differential equations describing the system dynamics are written first.