Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Covariance indicates the relationship ...
Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...
Back ground: Subjective cognitive decline (SCD) may be the first clinical sign of Alzheimer’s disease (AD). The possible neural mechanisms of SCD are not well known. This study aimed to compare ...
cov1Para: Linear shrinkage towards one-parameter matrix; all the variances are the same, all the covariances are zero. See Ledoit and Wolf (2004b). cov2Para: Linear shrinkage towards two-parameter ...
Abstract: The estimation of covariance matrices of multiple classes with limited training data is a difficult problem. The sample covariance matrix (SCM) is known to perform poorly when the number of ...
Abstract: We consider the problem of estimating high-dimensional covariance matrices of $K$-populations or classes in the setting where the sample sizes are ...
Sleep loss leads to serious health problems, impaired attention, and emotional processing. It has been suggested that the abnormal neurobehavioral performance after sleep deprivation was involved in ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback