Results 31 to 40 of about 2,352,460 (337)

A semi-analytical iterative method for solving differential algebraic equations

open access: yesAin Shams Engineering Journal, 2018
This work presents new implementation of an iterative method proposed by Temimi and Ansari namely (TAM) for approximate solutions of differential algebraic equations that arises in many engineering and applied sciences applications.
Majeed Al-Jawary, Sinan Hatif
doaj   +1 more source

Nonlinear Semi-Analytic Method for Spacecraft Navigation [PDF]

open access: yesAIAA/AAS Astrodynamics Specialist Conference and Exhibit, 2006
A nonlinear semi-analytic flltering method to sequentially estimate spacecraft states and their associated uncertainties is presented. We flrst discuss the state transition tensors that characterize the localized nonlinear behavior of the spacecraft trajectory and illustrate the importance of higher order efiects on orbit uncertainty propagation.
Park, Ryan, Scheeres, Daniel J.
openaire   +1 more source

Nonlinear Semi-Analytic Methods for Trajectory Estimation [PDF]

open access: yesJournal of Guidance, Control, and Dynamics, 2007
Nonlinear semi-analytic filtering methods to sequentially estimate spacecraft states and their associated uncertainties are presented. We first discuss the state transition tensors that characterize the localized nonlinear behavior of the trajectory statistics and illustrate the importance of higher-order effects on orbit uncertainty propagation.
Park, Ryan, Scheeres, Daniel J.
openaire   +2 more sources

Complex Fourier series expansion for the liquid-solid phase transition in PCM layers: transient and steady state periodic regimes [PDF]

open access: yesE3S Web of Conferences, 2021
Semi-analytical solutions to the classical two phase Stefan problem are proposed. Time dependent solutions to the one-dimensional liquid-solid phase transition in a PCM wallboard subjected to isothermal and periodic Dirichlet boundary conditions are ...
Santiago Acosta Rubén Dario   +3 more
doaj   +1 more source

Comments on the paper: Analytical and semi-analytical solutions for Phi-four equation through three recent schemes by Mostafa M.A. Khater and et al. [RINP, 22 (2021) 103954]

open access: yesResults in Physics, 2021
The aim of this comment paper is to show that the results obtained as semi-analytical solutions in  [1] are incorrect.
Lazhar Bougoffa
doaj   +1 more source

Semi-analytical solution for internal forces of tunnel lining with multiple longitudinal cracks

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2023
Longitudinal cracks on the tunnel lining significantly influence the performance of tunnels in operation. In this study, we propose a semi-analytical method that provides a simple and effective way to calculate the internal forces of tunnel linings with ...
Gan Wang   +3 more
doaj   +1 more source

Rectangular Potentials in a Semi-Harmonic Background: Spectrum, Resonances and Dwell Time [PDF]

open access: yes, 2011
We study the energy properties of a particle in one dimensional semi-harmonic rectangular wells and barriers. The integration of energies is obtained by solving a simple transcendental equation.
Fernández-García, Nicolás   +1 more
core   +5 more sources

Tip Effect of the Tapping Mode of Atomic Force Microscope in Viscous Fluid Environments

open access: yesSensors, 2015
Atomic force microscope with applicable types of operation in a liquid environment is widely used to scan the contours of biological specimens. The contact mode of operation allows a tip to touch a specimen directly but sometimes it damages the specimen;
Hua-Ju Shih, Po-Jen Shih
doaj   +1 more source

Semi-analytical solution of multilayer diffusion problems with time-varying boundary conditions and general interface conditions

open access: yes, 2018
We develop a new semi-analytical method for solving multilayer diffusion problems with time-varying external boundary conditions and general internal boundary conditions at the interfaces between adjacent layers.
Carr, Elliot J., March, Nathan G.
core   +1 more source

The theory of transmission spectra revisited: a semi-analytical method for interpreting WFC3 data and an unresolved challenge [PDF]

open access: yes, 2017
The computation of transmission spectra is a central ingredient in the study of exoplanetary atmospheres. First, we revisit the theory of transmission spectra, unifying ideas from several workers in the literature.
K. Heng, D. Kitzmann
semanticscholar   +1 more source

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