Results 21 to 30 of about 8,273,193 (339)

The validation of an aerospace structure through the sine vibration analysis [PDF]

open access: yesINCAS Bulletin, 2018
Sinusoidal vibrations represent an ideal case. Technically, it is quite hard to generate pure sinusoidal vibrations without containing other spectral components, called harmonics.
Cristina-Diana BRATU   +3 more
doaj   +1 more source

Leitmann's direct method for fractional optimization problems

open access: yes, 2010
Based on a method introduced by Leitmann [Internat. J. Non-Linear Mech. {\bf 2} (1967), 55--59], we exhibit exact solutions for some fractional optimization problems of the calculus of variations and optimal control.Comment: Submitted June 16, 2009 and ...
Agrawal   +26 more
core   +1 more source

Direct similarity reductions and new exact solutions of the short pulse equation

open access: yesAIMS Mathematics, 2019
In this paper, we present some similarity reductions of the short pulse equation(SPE) based on the direct similarity reduction method proposed by Clarkson and Kruskal.
Quting Chen, Yadong Shang
doaj   +1 more source

Implicit Alternating Direction Methods [PDF]

open access: yesTransactions of the American Mathematical Society, 1959
in general plane regions and with respect to linear boundary conditions, is a classical problem of numerical analysis. Many such boundary value problems have been solved successfully on high-speed computing machines, using the (iterative) Young-Frankel "successive overrelaxation" (SOR) method as defined in [1 ] and [2], and variants thereof ("line" and
Birkhoff, Garrett, Varga, Richard S.
openaire   +1 more source

Direct sampling method for anomaly imaging from S-parameter

open access: yes, 2018
In this paper, we develop a fast imaging technique for small anomalies located in homogeneous media from S-parameter data measured at dipole antennas. Based on the representation of S-parameters when an anomaly exists, we design a direct sampling method (
Park, Won-Kwang
core   +1 more source

French language instruction in Galicia (1867–1939): Analysis of curricula, programs, and methodologies

open access: yesІсторія науки і техніки
This study investigates the evolution of French language teaching methodologies in Galicia from 1867 to 1939, with a particular focus on the transition from the grammar-translation and text-translation methods to the direct method. Utilizing a historical-
Anton Ivashchuk
doaj   +1 more source

The selection of methods in the contemporary teaching of Russian as a foreign language

open access: yesInovacije u Nastavi
Despite claims about the outdatedness of teaching methods during the 1990s, contemporary practice of foreign language teaching shows that the concept of methodology has remained a relevant pedagogical framework.
Luka М. Мedenica
doaj   +1 more source

A fast direct numerical simulation method for characterising hydraulic roughness

open access: yes, 2015
We describe a fast direct numerical simulation (DNS) method that promises to directly characterise the hydraulic roughness of any given rough surface, from the hydraulically smooth to the fully rough regime.
Chan, Leon   +4 more
core   +1 more source

Direct numerical method for counting statistics in stochastic processes

open access: yes, 2010
We propose a direct numerical method to calculate the statistics of the number of transitions in stochastic processes, without having to resort to Monte Carlo calculations. The method is based on a generating function method, and arbitrary moments of the
Derrida B   +4 more
core   +1 more source

A Quality Improvement Initiative to Standardize Pneumocystis jirovecii Pneumonia Prophylaxis in Pediatric Patients With Solid Tumors

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Pediatric patients with extracranial solid tumors (ST) receiving chemotherapy are at an increased risk for Pneumocystis jirovecii pneumonia (PJP). However, evidence guiding prophylaxis practices in this population is limited. A PJP‐related fatality at our institution highlighted inconsistent prescribing approaches and concerns about
Kriti Kumar   +8 more
wiley   +1 more source

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