Results 11 to 20 of about 91,392 (304)
On the quasi-Fredholm and Saphar spectrum of strongly continuous Cosine operator function
Moroccan Journal of Pure and Applied Analysis, 2021 Let (C(t))t∈ be a strongly continuous cosine family and A be its infinitesimal generator. In this work, we prove that, if C(t) – coshλt is Saphar (resp. quasi-Fredholm) operator and λt /∉iπ, then A – λ2 is also Saphar (resp.
Boua Hamid
doaj +1 more source
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
CoRR, 2021 We are interested in solving decision problem $\exists? t \in \mathbb{N}, \cos t θ= c$ where $\cos θ$ and $c$ are algebraic numbers. We call this the $\cos t θ$ problem. This is an exploration of Diophantine equations with analytic functions. Polynomial, exponential with real base and cosine function are closely related to this decision problem ...
openaire +2 more sources
Digital shaping methods for nuclear pulse signal based on cosine function
He jishu, 2023 BackgroundCosine function shaping (or cos shaping) is used to digitally shape nuclear pulse signals, as the shaping method is simple and has high operability and flexibility.PurposeThis study aims to explore different cosine shaping methods of nuclear ...
WEI Yong +3 more
doaj +1 more source
An Intriguing Interpretation of 1D and 2D Non-Diffracting Modes in Cosine Profile
Photonics, 2023 We provide a simple analysis based on ray optics and Dirac notation for 1D (one-dimensional) and 2D (two-dimensional) non-diffracting modes in the cosine profile, which are often called Cosine beams. We explore various kinds of structured modes formed by
Allam Srinivasa Rao
doaj +1 more source
Spectral Theory For Strongly Continuous Cosine
Concrete Operators, 2021 Let (C(t))t∈ℝ be a strongly continuous cosine family and A be its infinitesimal generator. In this work, we prove that, if C(t) – cosh λt is semi-Fredholm (resp.
Boua Hamid
doaj +1 more source
An improved architecture for the adaptive discrete cosine transform [PDF]
, 1996 This paper presents a new approach to the efficient realisation of the discrete cosine transform for the specific case of interlaced image sequence coding.
Martin, F, Bull, DR
core +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
Riemann-Liouville fractional cosine functions
Electronic Journal of Differential Equations, 2016 In this article, we present the notion of Riemann-Liouville fractional cosine function. we prove that a Riemann-Liouville alpha-order fractional cosine function is equivalent to the Riemann-Liouville alpha-order fractional resolvent introduced in [15]
Zhan-Dong Mei, Ji-Gen Peng
doaj +1 more source
ON COSINE FAMILIES CLOSE TO SCALAR COSINE FAMILIES [PDF]
Journal of the Australian Mathematical Society, 2015 We prove that if two normed-algebra-valued cosine families indexed by a single Abelian group, of which one is bounded and comprised solely of scalar elements of the underlying algebra, differ in norm by less than$1$uniformly in the parametrising index, then these families coincide.
openaire +3 more sources