We proved that each square quaternion matrix has at least one right characteristic principal value and its eigenvector, and a concrete solution was given.
In this paper, based on the correlation matrix analysis of sample data, a principal component analysis method is used.
在本文的模型估计部分，依据样本数据相关矩阵分析结果，采用了样本主成分分析的方法。
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Wavelet transform was utilized to get coefficients of each scale. Based the coefficient matrix, principal component analysis model was established to diagnose sensor fault.