Results 41 to 50 of about 131,870 (297)

Hybrid Models for Solving the Colebrook–White Equation Using Artificial Neural Networks

open access: yesFluids, 2022
This study proposes hybrid models to solve the Colebrook–White equation by combining explicit equations available in the literature to solve the Colebrook–White equation with an error function. The hybrid model is in the form of fH=fo−eA.
Muhammad Cahyono
doaj   +1 more source

Derivatives of tangent function and tangent numbers

open access: yes, 2015
In the paper, by induction, the Fa\`a di Bruno formula, and some techniques in the theory of complex functions, the author finds explicit formulas for higher order derivatives of the tangent and cotangent functions as well as powers of the sine and ...
Bourbaki   +37 more
core   +1 more source

Sharp bounds on Hankel determinants of bounded turning functions involving the hyperbolic tangent function

open access: yesApplicable Analysis and Discrete Mathematics
In this paper, we determine the sharp upper bounds of Hankel determinants for logarithmic and inverse functions of bounded turning functions associated with the hyperbolic tangent function.
Zhi-Gang Wang   +4 more
semanticscholar   +1 more source

Orthospectra of Geodesic Laminations and Dilogarithm Identities on Moduli Space

open access: yes, 2009
Given a measured lamination on a finite area hyperbolic surface we consider a natural measure Mon the real line obtained by taking the push-forward of the volume measure of the unit tangent bundle of the surface under an intersection function associated ...
Calegari, Hopf, Lewin, Martin Bridgeman
core   +1 more source

A canonical ensemble approach to graded-response perceptrons [PDF]

open access: yes, 1998
Perceptrons with graded input-output relations and a limited output precision are studied within the Gardner-Derrida canonical ensemble approach. Soft non- negative error measures are introduced allowing for extended retrieval properties.
A. Treves   +26 more
core   +2 more sources

A Novel Power Curve Modeling Framework for Wind Turbines

open access: yesAdvances in Electrical and Computer Engineering, 2019
This paper presents two main novelties concerning power curve modeling of wind turbines. First novelty lies in the hybridization of 5 widely-used parametric functions and 8 recently-developed metaheuristic optimization algorithms.
YESILBUDAK, M.
doaj   +1 more source

Projective structures, grafting, and measured laminations [PDF]

open access: yes, 2007
We show that grafting any fixed hyperbolic surface defines a homeomorphism from the space of measured laminations to Teichmuller space, complementing a result of Scannell-Wolf on grafting by a fixed lamination.
Bers   +29 more
core   +3 more sources

A New AILC for a Class of Nonlinearly Parameterized Systems with Unknown Delays and Input Dead-Zone

open access: yesJournal of Applied Mathematics, 2014
This paper presents an adaptive iterative learning control (AILC) scheme for a class of nonlinear systems with unknown time-varying delays and unknown input dead-zone. A novel nonlinear form of deadzone nonlinearity is presented.
Jian-ming Wei, Yun-an Hu, Mei-mei Sun
doaj   +1 more source

Configurable Model for Sigmoid and Hyperbolic Tangent Functions

open access: yesApplications of Modelling and Simulation, 2023
Recurrent neural networks (RNNs) are considered to be among the most important types of neural networks especially for the applications where processing of a sequence of data comes to place. RNNs are in general computationally expensive and need a lot of processing time and power.
Khaled Salah   +3 more
openaire   +1 more source

Modeling Software Reliability with Learning and Fatigue

open access: yesMathematics, 2023
Software reliability growth models (SRGMs) based on the non-homogeneous Poisson process have played a significant role in predicting the number of remaining errors in software, enhancing software reliability.
Tahere Yaghoobi, Man-Fai Leung
doaj   +1 more source

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