Results 71 to 80 of about 3,006,945 (193)
Coexistence of poorer competitors for all available resources requires greater niche overlap
Ecosphere, Volume 17, Issue 7, July 2026.Abstract The need for niche differentiation among resource competitors to coexist is a universally accepted principle in ecology. However, this principle is derived from models with one or two resources or no resource dynamics at all. Graphical analysis of a consumer‐resource model including three resources shows that a consumer that is not the best ...
Mark A. McPeek
wiley +1 more source
Engineering Reports, Volume 8, Issue 7, July 2026.Analytical fuzzy soliton solutions of a modified space–time fractional ϕ4$$ {\phi}^4 $$ model are derived using EHFM, capturing memory effects and uncertainty. Results reveal diverse wave structures and show how fractional order and fuzziness significantly influence soliton amplitude, localization, and propagation, with heightened sensitivity near the ...
Mohsin Khalid +3 more
wiley +1 more source
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 +3 more
wiley +1 more source
Hybrid functions approach for the nonlinear Volterra–Fredholm integral equations [PDF]
, 2011 An approximation method based on hybrid Legendre and Block–Pulse functions used for the solution of nonlinear Volterra–Fredholm integral equations (NV-FIEs). These hybrid functions operational matrices are presented and are utilized to reduce a nonlinear
E. Hashemizadeh +5 more
core +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 +1 more
wiley +1 more source
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2015 We consider the questions of one value solvability of the inverse problem for a nonlinear partial Fredholm type integro-differential equation of the fourth order with degenerate kernel. The method of degenerate kernel is developed for the case of inverse
Tursun K Yuldashev
doaj +1 more source
Fractional boundary value problems: Analysis and numerical methods [PDF]
, 2011 This is the author's PDF of an article published in Fractional Calculus and Applied Analysis 2011. The original publication is available at www.springerlink.comThis journal article discusses nonlinear boundary value problems.Fundacao para a Ciencia e ...
M. Luísa Morgado +3 more
core +1 more source
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 +5 more
wiley +1 more source
Alexandria Engineering Journal, 2020 In this article, a new collocation technique for numerical solution of Fredholm, Volterra and mixed Volterra-Fredholm integral equations of the second kind is introduced and also developed a numerical integration formula on the basis of linear Legendre ...
Muhammad Asif +3 more
doaj +1 more source
Perturbed conformal field theory, nonlinear integral equations and spectral problems [PDF]
, 2000 This thesis is concerned with various aspects of perturbed conformal field theory and the methods used to calculate finite-size effects of integrable quantum field theories.
Dunning, Tania Clare +2 more
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