The projected GSURE for automatic parameter tuning in iterative shrinkage methods
نویسندگان
چکیده
منابع مشابه
The Projected GSURE for Automatic Parameter Tuning in Iterative Shrinkage Methods
Article history: 15 November 2009 Revised 10 October 2010 Accepted 23 November 2010 Available online 25 November 2010 Communicated by Martin Vetterli
متن کاملProjected non-stationary simultaneous iterative methods
In this paper, we study Projected non-stationary Simultaneous It-erative Reconstruction Techniques (P-SIRT). Based on algorithmic op-erators, convergence result are adjusted with Opial’s Theorem. The advantages of P-SIRT are demonstrated on examples taken from to-mographic imaging.
متن کاملprojected non-stationary simultaneous iterative methods
in this paper, we study projected non-stationary simultaneous it-erative reconstruction techniques (p-sirt). based on algorithmic op-erators, convergence result are adjusted with opial’s theorem. the advantages of p-sirt are demonstrated on examples taken from to-mographic imaging.
متن کاملShrinkage Tuning Parameter Selection in Precision Matrices Estimation
Recent literature provides many computational and modeling approaches for covariance matrices estimation in a penalized Gaussian graphical models but relatively little study has been carried out on the choice of the tuning parameter. This paper tries to fill this gap by focusing on the problem of shrinkage parameter selection when estimating sparse precision matrices using the penalized likelih...
متن کاملDescent Methods for Tuning Parameter Refinement
This paper addresses multidimensional tuning parameter selection in the context of “train-validate-test” and K-fold cross validation. A coarse grid search over tuning parameter space is used to initialize a descent method which then jointly optimizes over variables and tuning parameters. We study four regularized regression methods and develop the update equations for the corresponding descent ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied and Computational Harmonic Analysis
سال: 2011
ISSN: 1063-5203
DOI: 10.1016/j.acha.2010.11.005