Results 41 to 50 of about 6,802 (148)

Numerical Modeling of Geological Fault Reactivation Using Sequential Coupling Strategies

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT The interaction between fluid flow and mechanical deformation in fault zones can lead to processes of fault reactivation, triggering potential geomechanical problems such as seismicity, well collapse, fluid migration to shallower layers, and aggravated surface subsidence.
Julio Rueda, Cristian Mejia, Roberto Quevedo, Deane Roehl   +3 more
wiley   +1 more source

Caesarean Risk Prediction using Newton-Raphson Model: A Retrospective Cohort Study [PDF]

Journal of Clinical and Diagnostic Research
Introduction: The global rise in Caesarean section (C-section) rates is a pressing public health concern. A logistic regression model refined through the Newton-Raphson algorithm enhances precision and stability in predicting Caesarean Section (CS) risk.
Prachi Saoji, Lakshmi Madireddy, Ajeet Saoji, Kartik Khurana   +3 more
doaj   +1 more source

A Geometrically Regularized Gradient‐Damage Model With Orthogonality‐Based Energy Split for Dynamic Anisotropic Compression‐Shear Fracture

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT This study proposes a novel geometrically regularized gradient‐damage model for simulating dynamic mixed‐mode fracture in orthotropic materials with tension–compression asymmetry. In this model, a thermodynamic framework is formulated by incorporating damage dissipation into internal energy evolution, from which the constitutive relation and ...
Hui Li, Shanyong Wang
wiley   +1 more source

Discrete Implementations Modify the Intuition of Final Set Adjustment in Barrier Function Based Control

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper establishes an implementation‐aware framework for Barrier Function Adaptation (BFA) and shows that discrete‐time realizations fundamentally alter the logic of final‐set adjustment. In particular, sufficient conditions are derived to preserve the key benefits of BFA (predefined performance, gain adaptation with uncertain perturbation
Luis Ovalle, Andrés González, Leonid Fridman, Meléndez Alfredo   +3 more
wiley   +1 more source

Assessing the Effects of Biodiesel Production on Sustainability: A Bayesian Two‐Stage Data Envelopment Analysis Approach

Sustainable Development, EarlyView.
ABSTRACT Sustainable development transforms production systems, requiring integrated environmental, social, and economic strategies. Energy systems are key agro‐industrial supply chains in developing countries. Brazil's soybean supply chain impacts Gross Domestic Product, mainly through exports.
Aline Veronese da Silva, Camila Veneo Campos Fonseca, Pedro Gerber Machado, Marcelo Azevedo Costa   +3 more
wiley   +1 more source

Dual Quantum Dot Molecular FRET Probes for Picomolar DNA Hexaplexing

Small Methods, EarlyView.
Multiplexed quantification of six different DNA targets from a single 200 µL sample at picomolar concentrations was accomplished by spectrotemporal detection of time‐resolved FRET from a single Tb‐complex donor to two quantum dot acceptors using one‐color excitation and two‐color detection.
Ruifang Su, Federico Pini, Nour Fayad, Kimihiro Susumu, Marta M. Natile, Igor L. Medintz, Thibault Gallavardin, Thomas J. Sørensen, Niko Hildebrandt   +8 more
wiley   +1 more source

Computer Modeling of the Ferrite‐To‐Austenite Transformation in a Super‐Duplex Stainless Steel and the Important Role of Trans‐Interface Diffusion

steel research international, EarlyView.
An accurate moving boundary model for volume diffusion containing boundary conditions from trans‐interface diffusion (TID) simulates the austenite growth during cooling. TID of Cr, Mo, N and Ni enhance growth kinetics. Without TID, compositions of the interface region change, decreasing the driving force for growth and finally causing numerical ...
A. Salwén, T. Müller, S. Nouhi, J. Y. Jonsson   +3 more
wiley   +1 more source

Design and Applicability of Two-Step Fractional Newton–Raphson Method

Fractal and Fractional
Developing two-step fractional numerical methods for finding the solution of nonlinear equations is the main objective of this research article. In addition, we present a detailed study of convergence analysis for the methods that have been proposed.
Naseem Zulfiqar Ali, Awais Gul Khan, Muhammad Uzair Awan, Loredana Ciurdariu, Kamel Brahim   +4 more
doaj   +1 more source

Comparison of the Performance of the Gradient and Newton-Raphson Method to Estimate Parameters in Some Zero-Inflated Regression Models

Journal of Advanced Engineering and Computation, 2020
This paper compares the performance of the gradient and Newton-Raphson (N-R) method to estimate parameters in some zero-inflated (ZI) regression models such as the zero-inflated Poisson (ZIP) model, zero-inflated Bell (ZIBell) model, zero-inflated ...
Kim-Hung Pho, Buu-Chau Truong
doaj   +1 more source

Nonlinear analysis of flat post‐tensioned concrete slab–edge column connections

Structural Concrete, EarlyView.
Abstract This study presents nonlinear finite element analyses to investigate the punching shear behavior of unbonded post‐tensioned concrete flat slabs at slab‐edge column connections. A parametric analysis was conducted to evaluate the influence of four critical parameters on the punching shear resistance: the distribution of prestressing tendons ...
Igor Gonçalves, Ricardo Randi, Orlando M. Almeida, Elyson A. P. Liberati, Leandro M. Trautwein   +4 more
wiley   +1 more source