Assessing sigmoidal function on memristive maps [PDF]
HeliyonMemristors offer a crucial element for constructing discrete maps that have garnered significant attention in complex dynamics and various potential applications.
Vo Phu Thoai +3 more
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Tailor-made composite functions as tools in model choice: the case of sigmoidal
Plant Methods, 2006 Background Roots are the classical model system to study the organization and dynamics of organ growth zones. Profiles of the velocity of root elements relative to the apex have generally been considered to be sigmoidal.
Baskin Tobias I, Peters Winfried S
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A sigmoidal model for predicting soil thermal conductivity-water content function in room temperature [PDF]
Scientific ReportsApparent thermal conductivity of soil (λ) as a function of soil water content (θ), i.e., λ(θ) is needed to determine the heat flow in soil. The function of λ(θ) can be used in heat and water flow models for simplicity.
Ali Reza Sepaskhah +1 more
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A Neural Network Approximation Based on a Parametric Sigmoidal Function [PDF]
Mathematics, 2019 It is well known that feed-forward neural networks can be used for approximation to functions based on an appropriate activation function. In this paper, employing a new sigmoidal function with a parameter for an activation function, we consider a ...
Beong In Yun
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Sigmoidal water retention function with improved behaviour in dry and wet soils [PDF]
Hydrology and Earth System Sciences, 2021 A popular parameterized soil water retention curve (SWRC) has a hydraulic conductivity curve associated with it that can have a physically unacceptable infinite slope at saturation.
G. H. de Rooij, J. Mai, R. Madi, R. Madi
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A Note on Estimation of Multi-Sigmoidal Gompertz Functions with Random Noise [PDF]
Mathematics, 2019 The behaviour of many dynamic real phenomena shows different phases, with each one following a sigmoidal type pattern. This requires studying sigmoidal curves with more than one inflection point. In this work, a diffusion process is introduced whose mean
Patricia Román-Román +2 more
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Metastability in the mixing/demixing of two species with reciprocally concentration-dependent diffusivity [PDF]
Frontiers in Network PhysiologyIt has been shown before that two species of diffusing particles can separate from each other by the mechanism of reciprocally concentration-dependent diffusivity: the presence of one species amplifies the diffusion coefficient of the respective other ...
Alexander B. Neiman +4 more
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Approximation by superpositions of a sigmoidal function [PDF]
Mathematics of Control, Signals, and Systems, 1992 In this paper we demonstrate that finite linear combinations of compositions of a fixed, univariate function and a set ofaffine functionals can uniformly approximate any continuous function of n real variables with support in the unit hypercube; only mild conditions are imposed on the univariate function.
George Cybenko
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Sigmoidal Model For Belief Function- Based Electre Tri Method [PDF]
, 2015 Main decision-making problems can be described into choice, ranking or sorting of a set of alternatives or solutions. The principle of Electre TRI (ET)method is to sort alternatives ai according to criteria gj into categories Ch whose lower and upper limits are respectively bh and bh+1.
Jean Dezert, Jean‐Marc Tacnet
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Sigmoidal Functions: Some Computational and Modelling Aspects
Biomath Communications, 2015 We В focus on some computational, modelling and approximation issues related to the logistic sigmoidal function and to Heaviside step function. В The Hausdorff approximation of the Heaviside interval step function by sigmoidal functions is discussed from various computational and modelling aspects.
Nikolay Kyurkchiev, Svetoslav Markov
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