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1引言本文将输入向量采用奇异值分解方式进行正交变换，再与BP神经网络相结合用于测定配伍输液中的甲硝唑、头了解唑啉钠与维生素B6，结果令人满意。2原理2．1BP神经网络原理BP（backpropagation）神经网络是多层前馈神经网络，由一个输入层、一个输出层和几个隐含层构成。一通
1 Introduction In this paper, the input vector singular value decomposition method for orthogonal transform, and then combined with the BP neural network for the determination of compatibility infusion of metronidazole, the first to understand the sodium and sodium oxazolinates B6, the results were satisfactory. 2 PRINCIPLES 2.1 BP Neural Network Theory BP (backpropagation) neural network is a multi-layer feedforward neural network composed of an input layer, an output layer and several hidden layers. G