Results 81 to 90 of about 59,907 (228)

A Newton method without evaluation of nonlinear function values

, 1999
The present author recently proposed and proved a relationship theorem between nonlinear polynomial equations and the corresponding Jacobian matrix. By using this theorem, this paper derives a Newton iterative formula without requiring the evaluation of ...
Chen, W.
core  

Some classes of polynomial bidimensional cubic differential systems with the symmetry axis

, 2019
The autonomous bidimensional polynomial cubic systems of differential equations with pure imaginary eigenvalues of the Jacobian matrix at the singular point 0, 0 are considered in this paper. For these cubic systems the necessary and sufficient GL2,R-invariant conditions to having the symmetry axis, which passes through the origin of the coordinates of
Calin, I.T., Baltag, V.A.
openaire   +1 more source

What Drives CSR Performance: Structures, Declarations or Values?

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Sustainability and corporate social responsibility (CSR) are increasingly central to strategic management, yet a gap persists between formal commitments and actual practice. The study explores the structural and value‐based predictors of the institutional integration of CSR and sustainability, with a focus on the mediating role of the CSR ...
Pavla Vrabcová, Lukáš Falát, Hana Urbancová, Peter Madzík   +3 more
wiley   +1 more source

Local Polynomial Regression and Filtering for a Versatile Mesh‐Free PDE Solver

International Journal for Numerical Methods in Fluids, EarlyView.
A high‐order, mesh‐free finite difference method for solving differential equations is presented. Both derivative approximation and scheme stabilisation is carried out by parametric or non‐parametric local polynomial regression, making the resulting numerical method accurate, simple and versatile. Numerous numerical benchmark tests are investigated for
Alberto M. Gambaruto
wiley   +1 more source

Structure and Spectroscopy of Criegee Intermediates in Gas‐ and Aqueous Environments

Helvetica Chimica Acta, EarlyView.
ABSTRACT The dynamics and spectroscopy of the small (H2COO) and large (CH3CHOO) Criegee intermediates (CIs) in the gas phase, inside/on water droplets, on amorphous solid water (ASW) and in bulk water are investigated using validated energy functions.
Cangtao Yin, Meenu Upadhyay, Markus Meuwly   +2 more
wiley   +1 more source

Embracing Complexity in HRM Research: A Call for System and Process Perspectives

Human Resource Management, EarlyView.
ABSTRACT Human resource management (HRM) is inherently complex. It involves systems of principles, practices, and activities operating at individual, group, organizational, and macro levels, which are interlinked through complex processes. Yet, empirical research has not kept pace with this conceptual richness.
Rebecca Hewett, Madleen Meier‐Barthold
wiley   +1 more source

Association between annual twin delivery volume and severe postpartum hemorrhage in twin pregnancies

International Journal of Gynecology &Obstetrics, EarlyView.
Abstract Objective To assess the association between the risk of severe postpartum hemorrhage (PPH) and the annual twin delivery volume of maternity units. Methods JUmeaux MODe d'Accouchement (JUMODA) was a national observational prospective population‐based cohort of twin deliveries in 176 French maternity units performing more than 1500 annual ...
Victoire Pauphilet, François Goffinet, Aurelien Seco, Catherine Deneux‐Tharaux, Diane Korb, Thomas Schmitz, for the JUmeaux MODe d'Accouchement (JUMODA) study group and the Groupe de Recherche en Obstétrique et Gynécologie (GROG)   +6 more
wiley   +1 more source

Deciphering nodal burden in thyroid carcinoma: A dedicated survey of age, lymph node ratio, log odds of positive nodes, and preoperative prediction models

Journal of Intelligent Medicine, EarlyView.
Abstract Evidence regarding the prognosis of thyroid carcinoma is heterogeneous, ranging from age effects and nodal burden metrics, such as lymph node ratio (LNR) and log odds of positive nodes (LODDS), to preoperative imaging models comprising ultrasound, CEUS, and radiomics.
Mennatallah Sherif, Mohanad A. Deif, Eman K. Elsayed   +2 more
wiley   +1 more source

Planar cubic polynomial differential systems with the maximum number of invariant straight lines [PDF]

, 2004
Jaume Llibre, Nicolae Vulpe
openalex   +1 more source

Comprehensive Evidence for Mortality and Underlying Morbidity Related to Visceral Fat Distribution

Med Research, EarlyView.
ABSTRACT Linking obesity to mortality is an intriguing and controversial topic. This study tried to comprehensively assess 8 adiposity surrogates and mortality association among middle‐to‐old‐aged adults to identify a superior one, and explore explanatory disorders. Data sources included the National Health and Nutrition Examination Survey (NHANES), UK
Haolong Zhou, Danyang Ling, Qin Huang, Jiaojun Liang, Guanhua Su, Zhangbo Cui, Ziwei Chen, Xiaowen Ma, Zhou Jiang, Shuo Zheng, Haodong Tian, Qi Wang   +11 more
wiley   +1 more source