Results 21 to 30 of about 71,883 (316)

Sine Cosine Algorithm for Elite Individual Collaborative Search and Its Application in Mechanical Optimization Designs

open access: yesBiomimetics, 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

Improved morphological filtering method for interferograms

open access: yesThe Journal of Engineering, 2019
This study proposes an improved interferogram filtering method with mathematical morphology. The algorithm firstly converts the interferogram in cosine and sine parts to preserve the continuity of phases, then adopts the improved adaptive line structure ...
Bin Zhang, Shuang Li
doaj   +1 more source

Anisotropic etching of platinum electrodes at the onset of cathodic corrosion

open access: yesNature Communications, 2016
The corrosion mechanism of metals at cathodic potentials is still poorly understood. Here the authors report the cathodic corrosion onset potential of platinum in concentrated sodium hydroxide, showing etching anisotropy, and present a framework to ...
Thomas J. P. Hersbach   +2 more
doaj   +1 more source

Evolution characteristics of generalized Hermite-cosine-Gaussian solitons in optical nonlinear medium with spatial nonlocality

open access: yesResults in Physics, 2022
The evolution characteristics of Hermite-cosine-Gaussian beams in optical nonlinear medium with spatial nonlocality are investigated theoretically in detail.
Jie Li   +3 more
doaj   +1 more source

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

Chowla’s cosine problem [PDF]

open access: yesIsrael Journal of Mathematics, 2010
21 pp. Corrected typos.
openaire   +2 more sources

SOME WAYS OF SOLVING TRIGONOMETRIC EQUATIONS IN SECONDARY SCHOOL [PDF]

open access: yesVestnik Issyk-Kulʹskogo universiteta
The scientific article discusses methods for solving trigonometric equations in the high school mathematics course. Trigonometric equations are one of the most important topics in high school mathematics.
Nazarbaeva M. T.   +2 more
doaj   +1 more source

A New Extended Cosine—G Distributions for Lifetime Studies

open access: yesMathematics, 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

ON COSINE FAMILIES CLOSE TO SCALAR COSINE FAMILIES [PDF]

open access: yesJournal 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

Characterization of silicon pore optics for the NewAthena X-ray observatory in the PTB laboratory at BESSY II

open access: yesJournal of Synchrotron Radiation
The New Advanced Telescope for High ENergy Astrophysics (NewAthena) will be the largest space-based X-ray observatory ever built. It will have an effective area above 1.1 m2 at 1 keV, which corresponds to a polished mirror surface of about 300 m2 due to ...
M. Krumrey   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy