Comparing regularisation paths of (conjugate) gradient estimators in ridge regression [PDF]
arXivWe consider standard gradient descent, gradient flow and conjugate gradients as iterative algorithms for minimizing a penalized ridge criterion in linear regression. While it is well known that conjugate gradients exhibit fast numerical convergence, the statistical properties of their iterates are more difficult to assess due to inherent nonlinearities
arxiv
Nonlinear Thermophoresis beyond Local Equilibrium Criterion [PDF]
arXiv, 2006 Thermophoresis (thermodiffusion, Soret effect) moves molecules along thermal gradients. We measure its phenomenological linear drift relation by single particle tracking in convection-free settings. For moderate thermal gradients, drift velocity depends linearly on the gradient.
arxiv
Policy Gradient Methods for Reinforcement Learning with Function Approximation and Action-Dependent Baselines [PDF]
arXiv, 2017 We show how an action-dependent baseline can be used by the policy gradient theorem using function approximation, originally presented with action-independent baselines by (Sutton et al. 2000).
arxiv
Existence of solutions to nonhomogeneous Dirichlet problems with dependence on the gradient
Electronic Journal of Differential Equations, 2018 The goal of this article is to explore the existence of positive solutions for a nonlinear elliptic equation driven by a nonhomogeneous partial differential operator with Dirichlet boundary condition.
Yunru Bai
doaj
Size dependence in mechanical properties of gold at the micron scale in the absence of strain gradients [PDF]
, 2007 Julia R. Greer, William D. Nix
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A biharmonic elliptic problem with dependence on the gradient and the Laplacian
Electronic Journal of Differential Equations, 2009 We study the existence of solutions for nonlinear biharmonic equations that depend on the gradient and the Laplacian, under Navier boundary condition.
Paulo C. Carriao +2 more
doaj
Communication: Effect of the orbital-overlap dependence in the meta generalized gradient approximation [PDF]
, 2012 Jianwei Sun +2 more
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The Astrophysical JournalWe report the first experimental detection of a reflected Alfvén wave from an Alfvén-speed gradient under conditions similar to those in coronal holes. The experiments were conducted in the Large Plasma Device at the University of California, Los Angeles.
Sayak Bose +8 more
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GeoresursyFiltration of oil in low-permeable reservoirs is considered. The experimental data of dependence of filtration velocity on pressure gradient are analysed.
M. V. Zaitsev +2 more
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COSMOLOGICAL CONSTRAINTS FROM THE REDSHIFT DEPENDENCE OF THE ALCOCK-PACZYNSKI TEST: GALAXY DENSITY GRADIENT FIELD [PDF]
, 2014 Xiao-Dong Li +3 more
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