Fig 1: (a) Concept of cluster quantum microcombs. (b) Quadrature noise variances of EPR pairs relative to vacuum shot noise. (c) Covariance matrix of a 1D cluster state. (d) Covariance matrix of a 2D ...
The CLUSTER procedure stores the data (including the COPY and ID variables) in memory or, if necessary, on disk. If eigenvalues are computed, the covariance matrix is stored in memory. If the stored ...
If the population clusters have very different covariance matrices, using PROC ACECLUS is of no avail. Although methods exist for estimating multinormal clusters with unequal covariance matrices ...
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