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1·The important influence factors to TCMF are due to the difference of the main contents of TCM, the Cosin method is better for similarity evaluation than Correlation method.

中药指纹图谱相似度的影响因素由样品所含的主要化学成分所引起 ，相关系数法比夹角余弦法对指纹图谱中小色谱峰变化的反应明显。