Results 81 to 90 of about 967 (155)

Validation of machine learning based scenario generators

Journal of Risk and Insurance, Volume 93, Issue 2, Page 508-533, June 2026.
Abstract Machine learning (ML) methods are becoming increasingly important for designing economic scenario generators for internal models. Validating data‐driven models requires different methods than validating classical, theory‐based models. We discuss two novel aspects of such validation: first, checking the multivariate distribution of risk factors,
Gero Junike, Solveig Flaig, Ralf Werner
wiley   +1 more source

Generalized J-integral – mathematical foundation

Boundary Value Problems
This article describes the mathematics for building the foundations of the theory of the Generalized J-integral (GJ-integral) in various variational problems defined on D that gives the shape derivative on singular points such as boundaries, cracks ...
Kohji Ohtsuka
doaj   +1 more source

Nonparametric Cure Models Through Extreme‐Value Tail Estimation

Scandinavian Journal of Statistics, Volume 53, Issue 2, Page 984-1000, June 2026.
ABSTRACT In survival analysis, the estimation of the proportion of subjects who will never experience the event of interest, termed the cure rate, has received considerable attention recently. Its estimation can be a particularly difficult task when follow‐up is not sufficient, that is, when the censoring mechanism has a smaller support than the ...
Jan Beirlant, Martin Bladt, Ingrid Van Keilegom   +2 more
wiley   +1 more source

A characterization of metaplectic time–frequency representations

Bulletin of the London Mathematical Society, Volume 58, Issue 6, June 2026.
Abstract We characterize all time–frequency representations that satisfy a general covariance property: any weak*‐continuous bilinear mapping that intertwines time–frequency shifts on the configuration space with time–frequency shifts on phase space is a multiple of a metaplectic time–frequency representation. This characterization offers an intrinsic,
Karlheinz Gröchenig, Irina Shafkulovska
wiley   +1 more source

Stable factorization of the Calderón problem via the Born approximation

Journal of the London Mathematical Society, Volume 113, Issue 6, June 2026.
Abstract In this article, we prove the existence of the Born approximation in the context of the radial Calderón problem for Schrödinger operators. The Born approximation naturally appears as the linear component of a factorization of the Calderón problem; we show that the nonlinear part, obtaining the potential from the Born approximation, enjoys ...
Thierry Daudé, Fabricio Macià, Cristóbal Meroño, François Nicoleau   +3 more
wiley   +1 more source

Fréchet-Derivative-Based Global Sensitivity Analysis and Its Physical Meanings in Structural Design

Applied Sciences
Sensitivity analysis is essential for uncertainty-based structural design and analysis, especially global sensitivity analysis, which can reflect the overall physical properties of large and complex computational models with stochastic parameters.
Weifeng Tao, Zhiqiang Wan, Xiuli Wang
doaj   +1 more source

Ordinary Differential Equation Modeling and a Novel Zubair-Fréchet Distribution for Cholera in Ghana With Control Strategies. [PDF]

Health Sci Rep
Nyamekye KA, Sampane-Donkor E, Quarshie J, Asiedu-Bekoe F, Abdul-Tawab A, Aheto JMK.   +5 more
europepmc   +1 more source

Long-time behaviour and bifurcation analysis of a two-species aggregation-diffusion system on the torus. [PDF]

Calc Var Partial Differ Equ
Carrillo JA, Salmaniw Y.
europepmc   +1 more source

Gravity Water Waves over Constant Vorticity Flows: From Laminar Flows to Touching Waves. [PDF]

Water Waves
Gonçalves F.
europepmc   +1 more source

Tropical gradient descent. [PDF]

J Glob Optim
Talbut R, Monod A.
europepmc   +1 more source