Results 21 to 30 of about 284,471 (244)

Sintonização de estados quânticos: um estudo numérico do oscilador harmônico quântico

open access: yesQuímica Nova, 2012
The quantum harmonic oscillator is described by the Hermite equation.¹ The asymptotic solution is predominantly used to obtain its analytical solutions.
Leandro de Abreu   +1 more
doaj   +1 more source

Numerical Solution for an Epicycloid Crack

open access: yesJournal of Applied Mathematics, 2014
A flat crack, Ω, is lying in a three-dimensional homogenous isotropic elastic solid subjected to shear loading. A mathematical formulation is developed based on the mixed boundary values for Ω such that the problem of finding the resulting force can be ...
Nik Mohd Asri Nik Long   +3 more
doaj   +1 more source

Optimization of two-stage methanogenesis regime based on the Pontryagin’s maximum principle ***

open access: yesAdvanced Engineering Research, 2019
Introduction. The solution to the problem of optimal control of the biogas process under its conversion in two digesters is considered. The work objectives are to propose a mathematical model of this process and to develop an optimal control algorithm ...
S. A. Korolev, D. V. Maykov
doaj   +1 more source

Integral equation for numerical solution of stationary quantum-mechanical problems

open access: yesAdvanced Engineering Research, 2016
The work objective is to describe the numerical solution method for the stationary Schrödinger equation based on the application of the integral equation identical to the Schrödinger equation.
Sergey Yu. Knyazev
doaj   +1 more source

Study of the Moisture Absorption in Polymer Composites Reinforced with Vegetal Fiber Using Langmuir’s Model [PDF]

open access: yesMaterials Research, 2019
This work aims to numerically study the moisture absorption in polymer composites reinforced with vegetal fiber, using the diffusive model of Langmuir, which considers the existence of water molecules inside the material free to diffuse and adsorb at the
Wanessa Raphaella Gomes dos Santos   +2 more
doaj   +1 more source

New Cubic B-Spline Approximation for Solving Linear Two-Point Boundary-Value Problems

open access: yesMathematics, 2021
In this study, we introduce a new cubic B-spline (CBS) approximation method to solve linear two-point boundary value problems (BVPs). This method is based on cubic B-spline basis functions with a new approximation for the second-order derivative.
Busyra Latif   +2 more
doaj   +1 more source

Oscillation Flow of Viscous Electron Fluids in Conductors of Rectangular Cross-Section

open access: yesComputation
The article presents results of an analytical and numerical modeling of electron fluid motion and heat generation in a rectangular conductor at an alternating electric potential.
Andriy A. Avramenko   +5 more
doaj   +1 more source

An Evaluation of the Design Parameters of a Variable Bearing Profile Considering Journal Perturbation in Rotor–Bearing Systems

open access: yesDesigns, 2023
A variety of bearing profile designs can be used to improve the performance of a rotor–bearing system in severe conditions, such as operating with a shaft misalignment.
Adawiya Ali Hamzah   +5 more
doaj   +1 more source

Non-Steady-State Coupled Model of Viscosity–Temperature–Pressure in Polymer Flooding Injection Wellbores

open access: yesApplied Sciences
Polymer solutions play a crucial role in the polymer flooding process by influencing the flow characteristics of formation fluids and enhancing recovery efficiency.
Yutian Huang   +5 more
doaj   +1 more source

Communication and Language Profiles of Children Treated for Posterior Fossa Brain Tumors

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Cognitive and language deficits are frequently reported sequelae of posterior fossa brain tumors (PFBT). Typically, delayed onset impedes prompt assessment and early intervention. This has devastating implications for quality of life.
Zara Sved   +4 more
wiley   +1 more source

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