Abstract: In the interference rejection combining (IRC) algorithm, the sample covariance matrices generally have to be stored before being utilized, which can be extremely costly due to the large ...

I want to calculate virtual-virtual or occupied-occupied density matrix after MP2 calculation, how to get 2e-intergals with different orbital indices and fock-matrix? The formula of virtual-virtual ...

Thanks for your work in DiaNN. I used Diann1.8.1 in linux system and have a few questions about '--qvalue' and '--matrix-qvalue' . With the same DIA data, spectral library and other params, I tested ...

Download PDF More Formats on IMF eLibrary Order a Print Copy Create Citation This paper proposes a novel shrinkage estimator for high-dimensional covariance matrices by extending the Oracle ...

Calculating a covariance matrix is an essential process in understanding the relationships between different variables in a dataset. It allows you to assess how variables change together and provides ...

ABSTRACT: The paper introduces a new simple semiparametric estimator of the conditional variance-covariance and correlation matrix (SP-DCC). While sharing a similar sequential approach to existing ...

For the case where the multivariate normal population does not have null correlations, we give the exact expression of the distribution of the sample matrix of correlations R, with the sample ...

Abstract: The second-order statistics of the sample covariance are encountered in many covariance based processing algorithms. This paper derives closed-form expressions for the covariance of the ...