Results 41 to 50 of about 54,362 (337)
Analysis of ultradian rest-activity rhythms using locomotor activity in mice [PDF]
Kosin Medical Journal, 2022 Background Locomotor activity in mice may have an ultradian rest-activity rhythm. However, to date, no study has shown how locomotor activity can be explained statistically using fitted cosine curves.
Jung Hyun Lee +4 more
doaj +1 more source
The Cosine-Sine Functional Equation on Semigroups [PDF]
Annales Mathematicae Silesianae, 2021 Abstract The primary object of study is the “cosine-sine” functional equation f ( xy ) = f ( x ) g (
openaire +3 more sources
NN-Harmonic Mean Aggregation Operators-Based MCGDM Strategy in a Neutrosophic Number Environment
Axioms, 2018 A neutrosophic number (a + bI) is a significant mathematical tool to deal with indeterminate and incomplete information which exists generally in real-world problems, where a and bI denote the determinate component and indeterminate component ...
Kalyan Mondal +3 more
doaj +1 more source
Adaptive function approximation based on the Discrete Cosine Transform (DCT)
, 2023 This paper studies the cosine as basis function for the approximation of univariate and continuous functions without memory. This work studies a supervised learning to obtain the approximation coefficients, instead of using the Discrete Cosine Transform (
Pérez-Neira, Ana I. +2 more
core +1 more source
On the Superstability of the Pexider Type Trigonometric Functional Equation
Journal of Inequalities and Applications, 2010 We will investigate the superstability of the (hyperbolic) trigonometric functional equation from the following functional equations: f(x+y)±g(x−y)=λf(x)g(y) andf(x+y)±g(x−y)=λg(x)f(y), which can be considered ...
Gwang Hui Kim
doaj +2 more sources
Integrated cosine functions [PDF]
International Journal of Mathematics and Mathematical Sciences, 1994 In order to the second order Cauchy problem (CP2) : x″(t) = Ax(t), x(0) = x ∈ D(An), x″(0) = y ∈ D(Am) on a Banach space, Arendt and Kellermann recently introduced the integrated cosine function. This paper is concerned with its basic theory, which contain some properties, perturbation and approximation theorems, the relationship to analytic integrated
openaire +3 more sources
Mathematical modeling of non-Newtonian fluid in arterial blood flow through various stenoses
Advances in Difference Equations, 2021 Since the stenosis geometry of some cardiovascular patients cannot be described by a vertically symmetric function throughout the stenosis, so it motivates us to study the blood flow through a vertically asymmetric stenosis.
Pinyo Owasit, Somchai Sriyab
doaj +1 more source
Biomimetics, 2023 To address the shortcomings of the sine cosine algorithm such as the low search accuracy, slow convergence speed, and easily falling into local optimality, a sine cosine algorithm for elite individual collaborative search was proposed.
Junjie Tang, Lianguo Wang
doaj +1 more source
A New Extended Cosine—G Distributions for Lifetime Studies
Mathematics, 2021 In this article, we introduce a new extended cosine family of distributions. Some important mathematical and statistical properties are studied, including asymptotic results, a quantile function, series representation of the cumulative distribution and ...
Mustapha Muhammad +6 more
doaj +1 more source
A Conditional Symmetric Memristive System With Infinitely Many Chaotic Attractors
IEEE Access, 2020 A chaotic system with a hyperbolic function flux-controlled memristor is designed, which exhibits conditional symmetry and attractor growing. The newly introduced cosine function keeps the polarity balance when some of the variables get polarity inversed
Jiacheng Gu +4 more
doaj +1 more source