更改

<math>\alpha = \frac{\sigma_1^2}{\sum_i \sigma_i^2}</math>

<math>\alpha = \frac{\sigma_1^2}{\sum_i \sigma_i^2}</math>

该指数表明在矩阵<math>\mathbf{M}</math>的总能量中，第一个可分离矩阵所占的比例。<ref>{{citation|last1= Depireux | first1= D. A.|last2= Simon|first2= J. Z.|last3= Klein|first3= D. J.|last4= Shamma|first4= S. A. |date=March 2001| title="Spectro-temporal response field characterization with dynamic ripples in ferret primary auditory cortex"|journal= J. Neurophysiol|volume= 85 |issue=3|pages= 1220–34| doi=10.1152/jn.2001.85.3.1220 |pmid= 11247991}}</ref>。

该指数表明在矩阵<math>\mathbf{M}</math>的幂次中，第一个可分离矩阵所占的比例。<ref>{{citation|last1= Depireux | first1= D. A.|last2= Simon|first2= J. Z.|last3= Klein|first3= D. J.|last4= Shamma|first4= S. A. |date=March 2001| title="Spectro-temporal response field characterization with dynamic ripples in ferret primary auditory cortex"|journal= J. Neurophysiol|volume= 85 |issue=3|pages= 1220–34| doi=10.1152/jn.2001.85.3.1220 |pmid= 11247991}}</ref>。

===最近正交矩阵===

===最近正交矩阵===