Results 141 to 150 of about 2,471,206 (379)

A Prefixed Patch Time Series Transformer for Two-Point Boundary Value Problems in Three-Body Problems [PDF]

open access: yesarXiv
Two-point boundary value problems for cislunar trajectories present significant challenges in circler restricted three body problem, making traditional analytical methods like Lambert's problem inapplicable. This study proposes a novel approach using a prefixed patch time series Transformer model that automates the solution of two-point boundary value ...
arxiv  

Stability Estimates for an Inverse Hyperbolic Initial Boundary Value Problem with Unknown Boundaries [PDF]

open access: yesarXiv, 2014
In this paper we prove stability estimates of logarithmic type for an inverse problem consisting in the determination of unknown portions of the boundary of a domain in $\mathbb{R}^n$, from a knowledge, in a finite time observation, of overdetermined boundary data for initial boundary value problem for anisotropic wave equation.
arxiv  

Elasticity of Diametrically Compressed Microfabricated Woodpile Lattices

open access: yesAdvanced Engineering Materials, EarlyView.
Modulus–porosity relationship is derived for woodpile lattices with struts under diametrical compression. The formula presented here that Young's modulus is proportional to the square of the volume fraction E˜ρ2$E \sim \left(\rho\right)^{2}$ is shown to be consistent with computations and laboratory experiments on 3D‐printed samples.
Faezeh Shalchy, Atul Bhaskar
wiley   +1 more source

Wellposedness of Neumann boundary-value problems of space-fractional differential equations [PDF]

open access: yesarXiv, 2016
Fractional differential equation (FDE) provides an accurate description of transport processes that exhibit anomalous diffusion but introduces new mathematical difficulties that have not been encountered in the context of integer-order differential equation.
arxiv  

The factorization technique for difference equations [PDF]

open access: yesarXiv, 2015
We study multidimensional difference equations with a continual variable in the Sobolev--Slobodetskii spaces. Using ideas and methods of the theory of boundary value problems for elliptic pseudo differential equations we suggest to consider certain boundary value problems for such difference equations. Special boundary conditions permit to prove unique
arxiv  

On a singular boundary value problem

open access: yesJournal of Mathematical Analysis and Applications, 1970
AbstractThe purpose of this paper is to establish sufficient conditions for the existence and uniqueness of solution of the boundary value problem u″ = f(t, u, u′); (1) limt→0u(t)=0, limt→1u(t)=0. (2) It is assumed that the function f(t, x, y) is defined on the domain 0 < t < 1, −∞ < x, y < +∞, measurable in t for every x, y ϵ (−∞, +∞) and continuous ...
openaire   +2 more sources

Hydrogel‐Based Capacitive Sensor Model for Ammonium Monitoring in Aquaculture

open access: yesAdvanced Engineering Materials, EarlyView.
Traditional techniques for monitoring aquaculture water quality, particularly ammonium levels, harm fish. This work presents a novel capacitive sensor with an ionic hydrogel transducer to monitor ammonium concentration in real time based on the ammonium‐induced hydrogel dissociation and osmotic pressure. Monitoring aquaculture water quality, especially
Mohammad Mirzaee   +3 more
wiley   +1 more source

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