Results 21 to 30 of about 343,701 (293)

Fault Diagnosis Method Based on AUPLMD and RTSMWPE for a Reciprocating Compressor Valve

open access: yesEntropy, 2022
In order to effectively extract the key feature information hidden in the original vibration signal, this paper proposes a fault feature extraction method combining adaptive uniform phase local mean decomposition (AUPLMD) and refined time-shift ...
Meiping Song   +3 more
doaj   +1 more source

The Hahn-Banach theorem implies Sine’s mean ergodic theorem [PDF]

open access: yesProceedings of the American Mathematical Society, 1979
Using the Hahn-Banach theorem, a simple proof of Sine’s mean ergodic theorem is given.
openaire   +2 more sources

Circumpapillary course of retinal pigment epithelium can be fit to sine wave and amplitude of sine wave is significantly correlated with ovality ratio of optic disc. [PDF]

open access: yesPLoS ONE, 2015
The purpose of this study was to develop a method of quantifying the degree of optic disc tilt in normal eyes. This was a prospective, observational cross sectional study of 126 right eyes of 126 healthy volunteers.
Takehiro Yamashita   +6 more
doaj   +1 more source

A Sine Type Median Based Estimator for the Estimation of Population Mean

open access: yesOriental Journal of Physical Sciences, 2023
In the literature, there are numerous estimators for estimating population means when auxiliary information is provided. Subramani suggested ratio median based estimator when the median of the study variable is available and the regression estimator was shown to be significantly less efficient than the estimator.
Mojeed Abiodun Yunusa   +3 more
openaire   +1 more source

The Effect of Using the 5E Instructional Model on Students’ Performance in and Motivation to Learn Sine Rule and its Applications

open access: yesInternational Journal of Current Educational Studies, 2022
This study investigated the effect of using the 5E instructional model on Senior High School student’s mathematical achievement in the application of the sine rule.
Stonals Boakye, Micheal Johnson Nabie
doaj   +3 more sources

Modeling optical gap of cupric oxide nanomaterial semiconductor using hybrid intelligent method

open access: yesCogent Engineering, 2023
Copper II oxide (CuO) semiconductor belongs to the compound of metal oxide with abundant uniqueness and features which facilitate its wider applicability.
Abdullah Alqahtani
doaj   +1 more source

Flow stress prediction using hyperbolic-sine Arrhenius constants optimised by simple generalised reduced gradient refinement

open access: yesJournal of Materials Research and Technology, 2020
The generalised reduced gradient refinement was applied to optimise the constitutive constants obtained from hyperbolic-sine Arrhenius equation when describing the flow stress of two titanium alloys subjected to hot compression testing.
Michael Oluwatosin Bodunrin
doaj   +1 more source

Quark Confinement and Dual Representation in 2+1 Dimensional Pure Yang-Mills Theory [PDF]

open access: yes, 1996
We study the quark confinement problem in 2+1 dimensional pure Yang-Mills theory using euclidean instanton methods. The instantons are regularized and dressed Wu-Yang monopoles.
A.M. Polyakov   +25 more
core   +3 more sources

A novel hybrid GWO-SCA approach for optimization problems

open access: yesEngineering Science and Technology, an International Journal, 2017
Recent trend of research is to hybridize two and several number of variants to find out better quality of solution of practical and recent real applications in the field of global optimization problems.
N. Singh, S.B. Singh
doaj   +1 more source

Soliton ratchets induced by ac forces with harmonic mixing [PDF]

open access: yes, 2001
The ratchet dynamics of a kink (topological soliton) of a dissipative sine-Gordon equation in the presence of ac forces with harmonic mixing (at least bi-harmonic) of zero mean is studied.
A.K. Vidybida   +38 more
core   +2 more sources

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