Results 11 to 20 of about 49,658 (259)

A Weighted Cosine-G Family of Distributions: Properties and Illustration Using Time-to-Event Data

open access: yesAxioms, 2023
Modeling and predicting time-to-event phenomena in engineering, sports, and medical sectors are very crucial. Numerous models have been proposed for modeling such types of data sets.
Omalsad Hamood Odhah   +3 more
doaj   +1 more source

New Class of Cosine-Sum Windows

open access: yesIEEE Access, 2023
Window functions are required to achieve excellent frequency resolution, peak sidelobe ratio, and sidelobe decay. The cosine-sum window function satisfies these requirements.
Tomoya Yamaoka, Satoshi Kageme
doaj   +1 more source

A pseudorandom bit generator based on hyperbolic cosine function [PDF]

open access: yesITM Web of Conferences, 2022
In the literature, little attention is paid to devising and analyzing novel one dimensional chaotic mappings. In our previous efforts, we have tried fold, translation & scale on arctangent function & sigmoid function respectively, which brings good ...
Wu Qi
doaj   +1 more source

Novel cosine similarity measures on CIFS and its applications [PDF]

open access: yesJournal of Fuzzy Extension and Applications
In the evolving field of decision science, accurately measuring similarity under uncertainty remains a critical challenge. Despite significant advancements in developing CSMs for IFS and IVIFS, these approaches fall short of capturing the dual ...
Saranya Manoharan   +2 more
doaj   +1 more source

Similarity Measures of T-Spherical Fuzzy Sets Based on the Cosine Function and Their Applications in Pattern Recognition

open access: yesIEEE Access, 2020
In this manuscript, nine similarity measures of T-spherical fuzzy set (TSFS) considering the membership degree, the hesitancy degree, the non-membership degree and the refusal degree are developed according to the cosine function.
Mei-Qin Wu, Ting-You Chen, Jian-Ping Fan
doaj   +1 more source

Extended Wang sum and associated products.

open access: yesPLoS ONE, 2022
The Wang sum involving the exponential sums of Lerch's Zeta functions is extended to the finite sum of the Huwitz-Lerch Zeta function to derive sums and products involving cosine and tangent trigonometric functions.
Robert Reynolds, Allan Stauffer
doaj   +1 more source

Almost-distribution cosine functions and integrated cosine functions [PDF]

open access: yesStudia Mathematica, 2005
Operator valued cosine functions were introduced in the 1950s to solve well-posed abstract second order Cauchy problems. Later, in analogy to operator semigroup theory, the strong continuity conditions were weakened to be able to treat also ill-posed problems.
openaire   +1 more source

Bounded Cosine Functions Close to Continuous Scalar Bounded Cosine Functions [PDF]

open access: yesIntegral Equations and Operator Theory, 2016
Let $(C(t))\_{t \in R}$ be a cosine function in a unital Banach algebra. We show that if $sup\_{t\in R}\Vert C(t)-cos(t)\Vert \textless{} 2$ for some continuous scalar bounded cosine function $(c(t))\_{t\in \R},$ then the closed subalgebra generated by $(C(t))\_{t\in R}$ is isomorphic to $\C^k$ for some positive integer $k.$ If, further, $sup\_{t\in \R}
openaire   +2 more sources

Digital shaping methods for nuclear pulse signal based on cosine function

open access: yesHe 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

Analysis of ultradian rest-activity rhythms using locomotor activity in mice [PDF]

open access: yesKosin 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

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