Results 11 to 20 of about 43,273 (183)
Modeling Strain Hardening of Metallic Materials with Sigmoidal Function Considering Temperature and Strain Rate Effects. [PDF]
Materials (Basel)Pan B +3 more
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Blind Deblurring Based on Sigmoid Function [PDF]
Sensors, 2021 Blind image deblurring, also known as blind image deconvolution, is a long-standing challenge in the field of image processing and low-level vision. To restore a clear version of a severely degraded image, this paper proposes a blind deblurring algorithm based on the sigmoid function, which constructs novel blind deblurring estimators for both the ...
Shuhan Sun +3 more
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The generalized sigmoidal quantile function [PDF]
Communications in Statistics - Simulation and Computation, 2022 In this note we introduce a new smooth nonparametric quantile function estimator based on a newly defined generalized expectile function and termed the sigmoidal quantile function estimator. We also introduce a hybrid quantile function estimator, which combines the optimal properties of the classic kernel quantile function estimator with our new ...
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Baroreflex Curve Fitting Using a WYSIWYG Boltzmann Sigmoidal Equation
Frontiers in Neuroscience, 2021 Arterial baroreflex assessment using vasoactive substances enables investigators to collect data pairs over a wide range of blood pressures and reflex reactions. These data pairs relate intervals between heartbeats or sympathetic neural activity to blood
Karsten Heusser +6 more
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Some applications of sigmoid functions
Iranian Journal of Numerical Analysis and Optimization, 2021 Summary: In numerical analysis, the process of fitting a function via given data is called interpolation. Interpolation has many applications in engineering and science. There are several formal kinds of interpolation, including linear interpolation, polynomial interpolation, piecewise constant interpolation, trigonometric interpolation, and so on.
Jafari, Mohammad Ali, Aminataei, Azim
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Agronomy, 2023 Water deficit is one of the major limiting factors of seed crop germination and productivity. Consequently, superabsorbent polymers (SAPs) are among several technologies that enhance water use efficiency, leading to worthy seed germination. The objective
Rehab R. S. Ali +6 more
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Fractional Growth Model Applied to COVID-19 Data
Mathematics, 2021 Growth models have been widely used to describe behavior in different areas of knowledge; among them the Logistics and Gompertz models, classified as models with a fixed inflection point, have been widely studied and applied. In the present work, a model
Fernando Alcántara-López +4 more
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Remove Noise from Grayscale Digital Images by Traditional and Fuzzy Filters [PDF]
Al-Rafidain Journal of Computer Sciences and Mathematics, 2009 Image denoising and enhancement is an important field and it is used very much in image processing, where images are corrupted by many kinds of noise, therefore, methods and techniques must be used to remove these noises.
Baydaa Khalil
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Valuation of opportunity costs by rats working for rewarding electrical brain stimulation. [PDF]
PLoS ONE, 2017 Pursuit of one goal typically precludes simultaneous pursuit of another. Thus, each exclusive activity entails an "opportunity cost:" the forgone benefits from the next-best activity eschewed.
Rebecca Brana Solomon +2 more
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A Flexible Sigmoid Function of Determinate Growth [PDF]
Annals of Botany, 2002 A new empirical equation for the sigmoid pattern of determinate growth, 'the beta growth function', is presented. It calculates weight (w) in dependence of time, using the following three parameters: t(m), the time at which the maximum growth rate is obtained; t(e), the time at the end of growth; and w(max), the maximal value for w, which is achieved ...
Yin, X. +4 more
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