Results 141 to 150 of about 13,500,255 (277)
Extra multistep BFGS updates in quasi-Newton methods
International Journal of Mathematics and Mathematical Sciences, 2006 Issam A. R. Moghrabi
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Journal of Inequalities and ApplicationsThis article presents two variants of memoryless quasi-Newton methods with backtracking line search for large-scale unconstrained minimization. These updating methods are derived by means of a least-change updating strategy subjected to some weaker form ...
Keat Hee Lim, Wah June Leong
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A Splitting Architecture for Exact Reduced Coulomb Friction
Computer Graphics Forum, EarlyView.Abstract Existing approaches to frictional contact dynamics typically either modify the Coulomb law to improve numerical robustness or solve the exact law in a fully coupled monolithic form. However, in its reduced form, exact Coulomb friction can be written as a cone complementarity problem with an augmented velocity, which reveals a natural split ...
Hongcheng Song +3 more
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Fatigue &Fracture of Engineering Materials &Structures, EarlyView.ABSTRACT This study experimentally and numerically investigates fatigue damage in additively manufactured 316L stainless steel produced by selective laser melting using the powder bed fusion–laser beam process. More than 100 specimens were tested under tensile and strain‐controlled fatigue loading to evaluate the effects of surface condition, hot ...
M. Subasic +12 more
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Quasi-Newton's method with correction
Novi Sad Journal of Mathematics - NSJOM, 1996 The problem of solving a system of nonlinear equations \(F(x) = 0\), where \(F:\mathbb{R}^n \rightarrow \mathbb{R}^n\) is a nonlinear mapping of a special form \(F(x) = Ax + G(x)\) with linear part \(A \in \mathbb{R}^{n,n}\) and nonlinear part \(G:\mathbb{R}^n \rightarrow \mathbb{R}^n\), is considered.
Herceg, Dragoslav +2 more
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Continued population recovery and high annual survival rates of White‐rumped Vultures in Nepal
Ibis, EarlyView.Populations of Gyps vultures in South Asia underwent catastrophic declines caused by unintentional poisoning by the veterinary drug diclofenac. Since the drug was banned in 2006–2010, declines have halted across the region, including in Nepal. The present study updates population trends of G.
John W. Mallord +9 more
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Comparing Quasi-Newton Methods for Solving Sparse Interface Problems
, 1993 We examine some quasi-Newton methods for interface problems which arise from domain decomposition methods. These interface problems are usually sparse systems of linear or non-linear equations.
C. -h. Lai, Lai Cwi
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Ibis, EarlyView.Hatching failure represents a significant and growing barrier to reproductive success in threatened birds and yet is often poorly understood. Populations of the Eurasian Curlew Numenius arquata in the United Kingdom and Republic of Ireland have experienced significant declines over recent decades, and low breeding productivity is a major barrier to ...
Jamie Edward Thompson, Nicola Hemmings
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Inaccuracy in Quasi-Newton Methods: Local Improvement Theorems
, 1983 In this paper, we consider the use of bounded-deterioration quasi-Newton methods implemented in floating-point arithmetic to find solutions to F(x)=0 where only inaccurate F-values are available.
Dennis, J.E. Jr., Walker, Homer F.
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Debt Aversion: Theory and Measurement
International Economic Review, EarlyView.ABSTRACT We propose a model of debt aversion and conduct an experiment with real debt and saving contracts to jointly elicit debt aversion and preferences over time, risk, and intertemporal losses. We find that 89% of participants are debt averse, which strongly influences their choices.
David Albrecht, Thomas Meissner
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