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PRECONDITIONING A CLASS OF FOURTH ORDER PROBLEMS BY OPERATOR SPLITTING
parabolic problems fourth order problems preconditioning
2015/12/11
We develop preconditioners for systems arising from finite element discretizations of
parabolic problems which are fourth order in space. We consider boundary conditions which yield
a natural ...
Frames which are tight might be considered optimally conditioned in the sense of their numerical stability.This leads to the question of perfect preconditioning of frames,i.e., modification of a given...
PRECONDITIONING TECHNIQUES IN FRAME THEORY AND PROBABILISTIC FRAMES
Parseval frame Scalable frame Fritz John Theorem Probabilistic frames frame potential continuous frames
2015/12/10
In this chapter we survey two topics that have recently been investigated in frame theory. First, we give an overview of the class of scalable frames.These are (finite) frames with the property that e...
The recently introduced and characterized scalable frames can be considered as those frames which allow for perfect preconditioning in the sense that the frame vectors can be rescaled to yield a tight...
“PRECONDITIONING” FOR FEATURE SELECTION AND REGRESSION IN HIGH-DIMENSIONAL PROBLEMS
Model selection prediction error lasso
2015/8/21
We consider regression problems where the number of predictors greatly exceeds the number of observations. We propose a method for variable selection that first estimates the regression function, yiel...
First order optimization methods often perform poorly on ill-conditioned optimization problems. However, by preconditioning the problem data and solving the preconditioned problem, the performance of ...
Delayed Anesthetic Preconditioning and Metallothioneins I+II: Novel Mediators of Anesthetic-Induced Protection
Ischemia Metallothioneins Microarray Preconditioning Protection Anesthetic preconditioning
2014/12/10
Ischemic injury is a common and debilitating outcome of natural illness and as a complication of commonly performed medical procedures. Whereas naturally occurring ischemic insults are often the resul...
Stability and preconditioning for a hybrid approximation on the sphere
radial basis functions approximation on the sphere
2010/12/9
This paper proposes a new preconditioning scheme for a linear system with a saddle-point structure arising from a hybrid approximation scheme on the sphere, an approximation scheme that combines (loca...
Topographic Preconditioning of Open-Ocean Deep Convection
Topographic Preconditioning Open-Ocean Deep Convection
2008/12/10
Evidence for oceanic convection over Maud Rise in the Weddell Sea suggests that bottom topography may select the location and scale of deep convecting oceanic chimneys forced by seasonal large-scale a...
Large-Scale Preconditioning of Deep-Water Formation in the Northwestern Mediterranean Sea
Large-Scale Preconditioning deep-water formation Northwestern Mediterranean Sea
2008/12/10
The large-scale processes preconditioning the winter deep-water formation in the northwestern Mediterranean Sea are investigated with a primitive equation numerical model where convection is parameter...
A Statistical Theory for the “Patchiness” of Open-Ocean Deep Convection: The Effect of Preconditioning
Patchiness Open-Ocean Effect
2008/6/4
Within basins that exhibit open-ocean convection, convectively mixed fluid is often observed in regions of upward-doming isopycnal surfaces, preconditioned by either cyclonic circulation and/or bottom...
PRECONDITIONING HIGHER ORDER FINITE ELEMENTSYSTEMS BY ALGEBRAICMULTIGRID METHOD OF LINEAR ELEMENTS
2007/12/12
We present and analyze a robust preconditioned conjugate gradient
method for the higher order Lagrangian finite element systems of
a class of elliptic problems. An auxiliary linear element
stiffnes...
This paper discusses the optimal preconditioning in the domain
decomposition method for Wilson element. The process of the
preconditioning is composed of the resolution of a small scale global
prob...
A preconditioning method for the finite element stiffness matrix is given in this paper. The triangulation is refined in a subregion; the preconditioning process is composed of resolution of two regul...
期刊信息
篇名
Physical-interrelated-based preconditioning method and its applications in electromagnetic scattering and radiation problems.
语种
英文
撰写或编译
撰写
作者
Xie Yongjun,Zhang Yu,Liang C,Li L
第一作者单位
Nationa...