Results 11 to 20 of about 1,586 (179)

Trigonometric words ranking model for spam message classification

IET Networks, EarlyView., 2022
Abstract The significant increase in the volume of fake (spam) messages has led to an urgent need to develop and implement a robust anti‐spam method. Several of the current anti‐spam systems depend mainly on the word order of the message in determining the spam message, which results in the system's inability to predict the correct type of message when
Suha Mohammed Hadi, Ali Hakem Alsaeedi, Dhiah Al‐Shammary, Zaid Abdi Alkareem Alyasseri, Mazin Abed Mohammed, Karrar Hameed Abdulkareem, Riyadh Rahef Nuiaa, Mustafa Musa Jaber   +7 more
wiley   +1 more source

Optimization of Bacillus amyloliquefaciens BLB369 Culture Medium by Response Surface Methodology for Low Cost Production of Antifungal Activity

Microorganisms, 2022
Bacillus amyloliquefaciens BLB369 is an important plant growth-promoting bacterium, which produces antifungal compounds. A statistics-based experimental design was used to optimize a liquid culture medium using inexpensive substrates for increasing its ...
Imen Zalila-Kolsi, Sameh Kessentini, Slim Tounsi, Kaïs Jamoussi   +3 more
doaj   +1 more source

Bending and Free Vibration Analysis of Functionally Graded Plates via Optimized Non-polynomial Higher Order Theories [PDF]

Journal of Applied and Computational Mechanics, 2019
Optimization concept in the context of shear deformation theories was born for the development of accurate models to study the bending problem of structures. The present study seeks to extend such an approach to the dynamic analysis of plates.
David Ramirez, Lizbeth Cuba, J.L. MANTARI, RA Arciniega   +3 more
doaj   +1 more source

Examining the possibility of short-term prediction of traffic volume in smart city control systems with the use of regression models [PDF]

International Journal of Electronics and Telecommunications
This article deals with issues related to the optimization of traffic management in modern cities, the so-called Smart City. In particular, the article presents the process of evolution of the traffic flow prediction model at a selected crossroads in a ...
Peweł Dymora, Mirosław Mazurek, Maksymilian Jucha   +2 more
doaj   +3 more sources

C1 rational quadratic trigonometric spline

Egyptian Informatics Journal, 2013
A Bézier like C1 rational quadratic trigonometric polynomial spline is developed. It defines two shape parameters in each subinterval. The approximation and geometric properties are investigated. The curvature continuity is established.
Maria Hussain, Sidra Saleem
doaj   +1 more source

Nonperiodic Trigonometric Polynomial Approximation [PDF]

Journal of Scientific Computing, 2013
The suitable basis functions for approximating periodic function are periodic, trigonometric functions. When the function is not periodic, a viable alternative is to consider polynomials as basis functions. In this paper we will point out the inadequacy of polynomial approximation and suggest to switch from powers of $x$ to powers of $\sin(px)$ where ...
openaire   +3 more sources

Weighted inequalities for generalized polynomials with doubling weights

Journal of Inequalities and Applications, 2017
Many weighted polynomial inequalities, such as the Bernstein, Marcinkiewicz, Schur, Remez, Nikolskii inequalities, with doubling weights were proved by Mastroianni and Totik for the case 1 ≤ p < ∞ $1 \leq p < \infty$ , and by Tamás Erdélyi for 0 < p ≤ 1 $
Haewon Joung
doaj   +1 more source

Reconstruction of integrated equations of periodically driven phase-locked loop system from scalar time series [PDF]

Известия высших учебных заведений: Прикладная нелинейная динамика, 2022
Purpose of this work is to develop a reconstruction technique for the equations of a phase-locked loop system under periodic external driving from a scalar time series of one variable. Methods.
Sysoeva, Marina Vyacheslavovna, Kornilov, Maksim Vyacheslavovich, Takaishvili, Lev Vyacheslavovich, Matrosov, Valerij Vladimirovich, Sysoev, Ilya V.   +4 more
doaj   +1 more source

Rearrangements of Trigonometric Series and Trigonometric Polynomials [PDF]

Real Analysis Exchange, 2004
The paper is related to the following question of P.~L.~Ul'yanov: is it true that for any $2 $-periodic continuous function $f$ there is a uniformly convergent rearrangement of its trigonometric Fourier series? In particular, we give an affirmative answer if the absolute values of Fourier coefficients of $f$ decrease.
openaire   +3 more sources

A quadratic trigonometric spline for curve modeling. [PDF]

PLoS ONE, 2019
An imperative curve modeling technique has been established with a view to its applications in various disciplines of science, engineering and design. It is a new spline method using piecewise quadratic trigonometric functions.
Shamaila Samreen, Muhammad Sarfraz, Malik Zawwar Hussain   +2 more
doaj   +1 more source