特别地，能得到α角的余弦值，我们知道如何找两向量的夹角。
In particular,cosine of alpha,I can get, well, we know how to find the angle between two vectors.
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；
METHODS Chromatogram can be treated as vector of hyperspace, and the similarity between them can be counted according to vectorial angle formula.
针对基于向量夹角余弦准则下组合预测模型，研究它的基本结构特征。
In this paper, the basic structural characteristics of combination forecasting model is studied under the criterion of vectorial Angle cosine.
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