Results 131 to 140 of about 97,762 (292)
Variance-Guided Regression for Heteroscedastic Data With a Grouping-Based Extension for Nonlinear Prediction. [PDF]
Stat MedABSTRACT Although homoscedasticity is often assumed in linear regression, real data may show variance patterns or residual structures that violate this assumption. We propose VarGuid, a variance‐guided framework for two related settings: Covariate‐dependent conditional variance under a global linear mean model, and residual nonlinear mean structure ...
Liu S, Lu M.
europepmc +2 more sources
A dense initialization for limited-memory quasi-Newton methods
, 2019 We consider a family of dense initializations for limited-memory quasi-Newton methods. The proposed initialization exploits an eigendecomposition-based separation of the full space into two complementary subspaces, assigning a different initialization ...
Erway, Jennifer B. +7 more
core +1 more source
Hierarchical Optimization of the As‐Rigid‐As‐Possible Energy
Computer Graphics Forum, EarlyView.Abstract The As‐Rigid‐As‐Possible (ARAP) energy [SA07] has become a versatile ingredient in various geometry processing and machine learning methods. The classic method for its minimization is a block coordinate descent, alternating between local rotation estimation and a global linear solve, which converges slowly for large problem instances.
Hendrik Meyer, Bernd Bickel, Marc Alexa
wiley +1 more source
Quasi-Newton Methods for Nonlinear Least Squares Focusing on Curvatures
, 2007 . Most existing quasi-Newton methods for nonlinear least squares problems incorporate both linear and nonlinear information in the secant update. These methods exhibit good theoretical properties, but are not especially accurate in practice.
Jerry Eriksson
core
Greedy-quasi Newton methods with explicit superlinear convergence
, 2020 In this paper, we study greedy variants of quasi-Newton methods. They are based on the updating forulas from a certain subclass of the Broyden family. In particular, this subclass includes the well-known DFP, BFGS ans SR1 updates. However, in contrast to
Nesterov, Yurii, Rodomanov, Anton
core
On the construction of minimisation methods of quasi-Newton type
, 1987 The secant equation, which underlies all standard ‘quasi-Newton’ minimisation methods, arises from the use of a linear function to model the gradient along a chosen direction. We present new minimisation algorithms, derived by replacing this linear model
Saadallah, Adel F., Ford, John A.
core +1 more source
Computer Graphics Forum, EarlyView.Abstract We introduce mixed super‐circles, a position‐curvature formulation of the original dynamic 2D super‐helix model. Compared to the latter, purely curvature‐based model – the so‐called chained formulation –, the mixed formulation that we propose here drastically reduces the algorithmic complexity of the solving scheme – from quadratic to quasi ...
Emile Hohnadel +2 more
wiley +1 more source
Fast Nodal Hessian Computation for Peridynamic Fracture Simulation
Computer Graphics Forum, EarlyView.A fast, exact nodal Hessian computation for Non‐Ordinary State‐Based Peridynamics is introduced through analytical simplification and a warp‐centric GPU strategy. The method accelerates preconditioned solvers and Vertex Block Descent, enabling interactive fracture simulation with physical accuracy.
Yuxiong Qin +2 more
wiley +1 more source
European Journal of Oral Sciences, EarlyView.Abstract This study evaluated (1) the load‐bearing capacity of molars restored with direct occlusal veneers fabricated either from short‐fiber‐reinforced composite (SFRC) or particulate‐filled composite (PFC) and the presence of internal voids within the materials, and (2) effect of water storage on the fracture load and correlation between internal ...
Topias Yli‐Urpo +6 more
wiley +1 more source
Black Fugitivity in the Sporting Workplace: The Story of Eniola Aluko
Gender, Work &Organization, EarlyView.ABSTRACT Being a Black fugitive involves constant movement: to find and cultivate spaces of safety and hope. In this paper, I curate a sporting archive about the UK Black women's elite football player Eniola Aluko to read her as a Black fugitive. I demonstrate how she traversed a racist and anti‐Black sporting workplace—where she was unfairly demonized
Aarti Ratna
wiley +1 more source