Blood sample quality

A Fatty blood sample.

Division of Laboratory andGenomicMedicine, Department of Pathology,WashingtonUniversity School of Medicine, St. Louis, MO. * Address correspondence to this author at: Washington University School of Medicine, 660 South Euclid Ave, St. Louis, MO. Fax 314-362-1461; [email protected]. Received October 15, 2014; accepted October 31, 2014. DOI: 10.1373/clinchem.2014.234831 © 2014 America...

Face Sample Quality

Face is a human biometric attribute that can be used to establish the identity of a person. A face-based biometric system operates by capturing probe face samples and comparing them against gallery face templates. The intrinsic characteristics of captured face samples determine their effectiveness for face authentication. Face sample quality is a measurement of these intrinsic characteristics. ...

Measuring Sample Quality with Diffusions

Standard Markov chain Monte Carlo diagnostics, like effective sample size, are ineffective for biased sampling procedures that sacrifice asymptotic correctness for computational speed. Recent work addresses this issue for a class of strongly log-concave target distributions by constructing a computable discrepancy measure based on Stein’s method that provably determines convergence to the targe...

Measuring Sample Quality with Kernels

Approximate Markov chain Monte Carlo (MCMC) offers the promise of more rapid sampling at the cost of more biased inference. Since standard MCMC diagnostics fail to detect these biases, researchers have developed computable Stein discrepancy measures that provably determine the convergence of a sample to its target distribution. This approach was recently combined with the theory of reproducing ...

Sample Method and Quality Control