Results 21 to 30 of about 582,363 (267)

Tensile and Bending Strength Analysis of Ramie Fiber and Woven Ramie Reinforced Epoxy Composite

open access: yesJournal of Natural Fibers, 2021
This study aims to analyze the effect of the number of woven ramie layers (plies) and ramie fiber weight as reinforcement of composite on the tensile strength and bending strength.
Zulkifli Djafar   +2 more
doaj   +1 more source

The twentieth Fermat number is composite [PDF]

open access: yesMathematics of Computation, 1988
The twentieth Fermat number, F 20 = 2 2 20 + 1 {F_{20}
Young, Jeff, Buell, Duncan A.
openaire   +1 more source

Adaptive Speaker Recognition Based on Hidden Markov Model Parameter Optimization

open access: yesIEEE Access, 2020
The Hidden Markov Model (HMM) is a widely used method for speaker recognition. During its training, the composite order of the measurement probability matrix and the number of re-evaluations of the initial model affect the speed and accuracy of a ...
Yangjie Wei
doaj   +1 more source

Compositional Bernoulli numbers

open access: yes, 2007
16 pages, to appear in Afr.
Blandin, Hector, Diaz, Rafael
openaire   +2 more sources

Highly Composite Numbers

open access: yes, 2023
The main result of this thesis is to show that there are only finitely many integers $n$ such that both $n$ and $d(n)$ are highly composite numbers at the same time, where $d(n)$ is the divisor function. Bertrand's postulate [4] is used many times throughout the thesis and allows us to write a proof that is as simple (and as short) as possible.
openaire   +2 more sources

Determination of the Optimum formula for Composite Motor Gasoline Octane Number Blending Enhancer

open access: yesJournal of Engineering, 2019
To decrease the dependency of producing high octane number gasoline on the catalytic processes in petroleum refineries and to increase the gasoline pool, the effect of adding a suggested formula of composite blending octane number enhancer to motor ...
Alaa D. Jawad Al-Bayati   +2 more
doaj   +1 more source

Narayana numbers and Schur–Szegő composition

open access: yesJournal of Approximation Theory, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kostov, Vladimir   +2 more
openaire   +2 more sources

The Preparation, Characterization, and Influence of Multiple Electroless Nickel-Phosphorus (Ni-P) Composite Coatings on Poplar Veneer

open access: yesBioResources, 2015
Nickel-Phosphorus (Ni-P) composite coatings were prepared on a poplar veneer surface via a simple electroless nickel (Ni) approach. The substrate deformation, flatness, crystalline structure, and wear resistance of the Ni-P composite coatings were ...
Yanfei Pan, Xin Wang, Jintian Huang
doaj   +1 more source

Influence of in vitro irrigation protocols on root canal treatment for bond strength to enamel and coronary dentin

open access: yesSaudi Endodontic Journal, 2021
Introduction: The purpose of this study was to evaluate the effects of different concentrations of chitosan solution used as a final rinse after root canal treatment on the shear bond strength of composite resin to enamel and coronary dentin.
Vanessa Lessa Araújo   +6 more
doaj   +1 more source

Study on computational efficiency of composite schemes for convection-diffusion equations using single-grid and multigrid methods

open access: yesJournal of Thermal Science and Technology, 2015
The computational efficiency of different composite schemes for the convection terms of the convection-diffusion equations is systematically studied in this paper.
Jingfa LI   +4 more
doaj   +1 more source

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