Results 21 to 30 of about 179,091 (292)

The Earth-Moon Transfer Trajectory Design and Analysis using Intermediate Loop Orbits [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
Various Earth-Moon transfer trajectories are designed and analyzed to prepare the future Korea's Lunar missions. Minimum fuel trajectory solutions are obtained for the departure year of 2017, 2020, 2022, and every required mission phases are analyzed ...
Young-Joo Song   +4 more
doaj   +1 more source

On the smoothness of nonlinear system identification

open access: yes, 2020
We shed new light on the \textit{smoothness} of optimization problems arising in prediction error parameter estimation of linear and nonlinear systems.
Aguirre, Luis A.   +4 more
core   +1 more source

Global Analysis of a Planetary Gear Train

open access: yesShock and Vibration, 2014
By using the Poincaré-like cell-to-cell mapping method and shooting method, the global characteristics of a planetary gear train are studied based on the torsional vibration model with errors of transmission, time-varying meshing stiffness, and multiple ...
Tongjie Li, Rupeng Zhu
doaj   +1 more source

Design of Round Trip Trajectories to Lunar L1 [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2013
In this paper design of transfer trajectory from Earth park orbit to a halo orbit around L1 of Earth-Moon system and return trajectory from halo orbit to the Earth are investigated.
M. Jafari -Nadoushan, A. Novinzadeh
doaj  

Multiple Solutions of Mixed Convective MHD Casson Fluid Flow in a Channel

open access: yesJournal of Applied Mathematics, 2016
A numerical investigation is made to determine the occurrence of the multiple solutions of MHD Casson fluid in a porous channel. Governing partial differential equation of the proposed problem converted into nonlinear ordinary differential equations by ...
Jawad Raza   +2 more
doaj   +1 more source

Study on Composite Electromagnetic Scattering Characteristics of Low-Altitude Target Above Valley Composite Rough Surface Using Hybrid SBR-EEC Method

open access: yesIEEE Access, 2020
The composite electromagnetic (EM) scattering characteristics of low-altitude target above valley composite rough surface are studied. The composite rough surface modeling theory is adopted to simulate the natural cavity structure of valley environment ...
Gaoxiang Zou   +4 more
doaj   +1 more source

Multiplicity of solutions for the Minkowski-curvature equation via shooting method

open access: yesBruno Pini Mathematical Analysis Seminar, 2019
In this paper we prove the existence and the multiplicity of radial positive oscillatory solutions for a nonlinear problem governed by the mean curvature operator in the Lorentz-Minkowski space. The problem is set in an N-dimensional ball and is subject to Neumann boundary conditions. The main tool used is the shooting method for ODEs.
Alberto Boscaggin   +2 more
openaire   +7 more sources

Automatic computation of quantum-mechanical bound states and wavefunctions [PDF]

open access: yes, 2013
We discuss the automatic solution of the multichannel Schr\"odinger equation. The proposed approach is based on the use of a CP method for which the step size is not restricted by the oscillations in the solution.
Ledoux, Veerle, Van Daele, Marnix
core   +3 more sources

An Improved Vision Method for Robust Monitoring of Multi-Point Dynamic Displacements with Smartphones in an Interference Environment

open access: yesSensors, 2020
Current research on dynamic displacement measurement based on computer vision mostly requires professional high-speed cameras and an ideal shooting environment to ensure the performance and accuracy of the analysis.
Taicong Chen, Zhou Zhou
doaj   +1 more source

Design and Implementation of an Autonomous Electric Vehicle for Self-Driving Control under GNSS-Denied Environments

open access: yesApplied Sciences, 2021
In this study, the hardware and software design and implementation of an autonomous electric vehicle are addressed. We aimed to develop an autonomous electric vehicle for path tracking. Control and navigation algorithms are developed and implemented. The
Ali Barzegar   +2 more
doaj   +1 more source

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