Results 71 to 80 of about 3,135,223 (208)

On Monotonic and Nonnegative Solutions of a Nonlinear Volterra-Stieltjes Integral Equation

Journal of Function Spaces, 2014
We study the existence of monotonic and nonnegative solutions of a nonlinear quadratic Volterra-Stieltjes integral equation in the space of real functions being continuous on a bounded interval. The main tools used in our considerations are the technique
Tomasz Zając
doaj   +1 more source

BioPest: An Integrated Deep Learning Driven Predator–Prey Framework for Early Pest Detection and Biological Control

Engineering Reports, Volume 8, Issue 7, July 2026.
This study integrates EfficientNetV2‐based classification and counting of 12 pest species with a hybrid Neural ODE predator–prey model for biological pest control. Deep learning (DL) population estimates are used to initialize the ODE system, which is empirically validated against real insect population time‐series data.
M. Monzu Uddin, Mohammad Sakib, S. Akter, M. Humayun Kabir   +3 more
wiley   +1 more source

Exploring Approaches to Conceptualization in System Dynamics Modeling

System Dynamics Review, Volume 42, Issue 3, July/September 2026.
ABSTRACT Model conceptualization in system dynamics (SD) is a critical yet relatively underexplored phase of the modeling process, often described as both an art and a science. Practitioners employ a wide range of approaches, frequently combining multiple methods to address complex or unfamiliar problems.
Mehdi Moghadam Manesh, Allyson Beall King   +1 more
wiley   +1 more source

Asymptotically periodic solutions of Volterra integral equations

Electronic Journal of Differential Equations, 2016
We study the existence of asymptotically periodic solutions of a nonlinear Volterra integral equation. In the process, we obtain the existence of periodic solutions of an associated nonlinear integral equation with infinite delay.
Muhammad N. Islam
doaj  

Discovering data‐driven microbial growth models with symbolic regression

Methods in Ecology and Evolution, Volume 17, Issue 7, Page 2135-2148, July 2026.
Abstract Connecting mathematical models with empirically measured microbial growth has remained challenging, as numerous competing models based on different theoretical approaches can fit observations. Therefore, we develop a method to automatically propose growth models from microbial data alone. We validate this approach using an available dataset of
T. Anthony Sun, Dovydas Kičiatovas, Inga‐Katariina Aapalampi, Teemu Kuosmanen, Teppo Hiltunen, Ville Mustonen   +5 more
wiley   +1 more source

Nonconvolution nonlinear integral volterra equations with monotone operators

Computers & Mathematics with Applications, 2005
Some results about existence, uniqueness, and attractive behaviour of solutions for nonlinear Volterra integral equations with non-convolution kernels are presented in this paper. These results are based on similar ones about nonlinear Volterra integral equations with convolution kernels and some comparison techniques.
Arias, M.R., Benítez, R., Bolós, V.J.
openaire   +3 more sources

Inferring Interspecific Interactions Among African Savannah Herbivores Using Detectability‐Corrected Co‐Abundance Patterns

African Journal of Ecology, Volume 64, Issue 5, July 2026.
ABSTRACT Competition and facilitation are fundamental concepts in ecology, but evidence for the strength and direction of interspecific interactions within trophic levels is difficult to obtain, particularly in large assemblages of free‐ranging animals.
Harry B. M. Wells, Izak P. J. Smit, Judith Botha, Robert M. Pringle, Ramiro D. Crego   +4 more
wiley   +1 more source

Audit‐Ready Machine Learning for Short‐Horizon Equity Prediction: A Dual‐Target Benchmark With Fold‐Isolated Preprocessing

Engineering Reports, Volume 8, Issue 6, June 2026.
This study introduces a rigorous, walk‐forward protocol to evaluate next‐day return and volatility‐proxy forecasting across matched model families. By enforcing fold‐isolated preprocessing and causal feature construction on US mega‐caps, the study eLectively mitigates performance inflation.
Abdul Kadar Muhammad Masum, Md. Abul Kalam Azad, Mirza Nadim Saad, Al‐Amain, Mohammad Azam Khan, A. B. M. Yasir Arafat   +5 more
wiley   +1 more source

Filtros volterra adaptativos: estruturas interpoladas e modelos estocásticos [PDF]

, 2012
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Elétrica, Florianópolis, 2009.Este trabalho de pesquisa visa o estudo de filtros Volterra adaptativos objetivando desenvolver novas ...
Batista, Eduardo Luiz Ortiz
core  

Matsumura‐Type Estimates and Global Solutions of a Fractional Wave Equation With Nonlocal Nonlinearity

Mathematical Methods in the Applied Sciences, Volume 49, Issue 9, Page 9967-9983, June 2026.
ABSTRACT The main results of this paper are the global existence and long time behavior of solutions of a fractional wave equation with a nonlocal nonlinearity. The techniques in this work rely on norm estimates of the solutions of εutt+ut+(−Δ)βu=0,u(0,x)=φ(x),ut(0,x)=ψ(x),$$ \varepsilon {u}_{tt}+{u}_t+{\left(-\Delta \right)}^{\beta }u=0,\kern1em u ...
Ibrahim Ahmad Suleman, Mokhtar Kirane
wiley   +1 more source