Results 1 to 10 of about 430,734 (311)

Importance Sampling for Nonlinear Models

CoRR
While norm-based and leverage-score-based methods have been extensively studied for identifying "important" data points in linear models, analogous tools for nonlinear models remain significantly underdeveloped. By introducing the concept of the adjoint operator of a nonlinear map, we address this gap and generalize norm-based and leverage-score-based ...
Rajmohan, Prakash Palanivelu, Roosta, Fred   +1 more
openaire   +6 more sources

Strain-Rate and Stress-Rate Models of Nonlinear Viscoelastic Materials

Mathematics
The paper is devoted to the modeling of nonlinear viscoelastic materials. The constitutive equations are considered in differential form via relations between strain, stress, and their derivatives in the Lagrangian description.
Claudio Giorgi, Angelo Morro
doaj   +1 more source

Determination of Capacity and Rules of the Variability of Maximum Force Using Nonlinear Mathematical Models: a Case Study.

Central European Journal of Sport Sciences and Medicine, 2016
The aim of this study is to determine the capacity and the variability of maximum force rules measured 1 RM for eight muscle groups (back-hip extensors, legs extensors, arm extensors, back extensors, shoulder and arms extensors, shoulder joint flexors ...
Milenko B. Milosevic, Vesna J. Nemec, Morteza Jourkesh, Predrag M. Nemec, Milos M. Milosevic, Behm G. David   +5 more
doaj   +1 more source

Determination of Phosphorus Requirement for Post Molted Laying Hens using Nonlinear and Multivariate Nonlinear Mixed Effects Models

The Journal of Poultry Science, 2014
An experiment was conducted to determine the available phosphorus (AP) requirement for post molted laying hens by using the broken line models, logistic model, saturation kinetics model and multivariate nonlinear mixed effects models. The experiment was
Saeed Khalaji, Amir H. Naderi, Seyed N. Mousavi, Mojtaba Zaghari, Ahmad Malakzadegan   +4 more
doaj   +1 more source

CATASTROPHE THEORY AND ITS APPLICATION IN ECONOMICS [PDF]

فصلنامه پژوهش‌های اقتصادی ایران, 2002
Sudden jumps, qualitative changes and discontinuities are not rare in social and economic phenomena. Catastrophe theory is a proper approach to modeling of dynamical systems that a company faces with sudden jump.
Hossein Abbasi Nejad, Shapour Mohamadi
doaj  

Uma nota sobre "Teste da convergência do PIB per capita da agropecuária no Brasil"

Revista de Economia e Sociologia Rural, 2013
A presente nota discute a contradição entre os testes de β e σ- convergência dos PIBs agropecuários per capita recentemente apresentada por Spohr e Freitas (RESR, vol. 49, nº 02, p. 341-368, abr/jun 2011).
Christiano Penna, Fabricio Linhares
doaj  

Energy Consumption and Economic Growth: a Nonlinear Approach [PDF]

فصلنامه پژوهش‌های اقتصادی ایران, 2010
The annual data on economic growth and energy consumption in Iran during the period 1352-1386 is used to study the effect of energy use on the growth of Iranian economy. To that end, a smooth transition regression model is used.
Firooz Falahi, jalal montazeri shoorekchali   +1 more
doaj  

Growth curve mixed nonlinear models in quails. [PDF]

PLoS One, 2023
Júnior RNCC, de Araújo CV, de Menezes FL, de Araújo SI, Pavan NL, Rocha-Silva M, Silva WCD, Felipe Marques JR, Maciel E Silva AG, de Menezes Chalkidis H, Júnior JBL.   +10 more
europepmc   +1 more source

Revisiting the Obesity–Anaemia Paradox: Inflammation and Iron Homeostasis in the BMI–Haemoglobin Relationship

Endocrinology, Diabetes & Metabolism
Background Obesity and anaemia are global epidemics with complex, overlapping pathophysiology. While excess adiposity is known to induce chronic inflammation that disrupts iron homeostasis, multiple population studies paradoxically report higher ...
Ali Hemade, Pascale Salameh
doaj   +1 more source

Non-linear model-based sequential decision-making in agriculture

Environmental Research Communications
Agricultural decision-making faces a dual challenge: sustaining high yields to meet global food security needs while reducing the environmental impacts of input use, including fertilizer losses (e.g., nutrient runoff and leaching) and other agrochemical ...
Sakshi Arya, Wentao Lin
doaj   +1 more source