METHODS Chromatogram can be treated as vector of hyperspace, and the similarity between them can be counted according to vectorial angle formula.
方法将色谱指纹图谱看作多维空间内的向量，利用向量夹角余弦的基本公式计算两个指纹图谱间的相似度；
2
The application of magnetic transmission technology in the agitating device is discussed, Some design methods and calculation formula are obtained by analysis and experiments.
On this basis, the necessity of testing prior hypothesis by means of experimental data is proved, and some practical test methods and formula are presented.