Results 21 to 30 of about 21,521 (260)

Variational Methods in Surface Parameterization [PDF]

, 2005
A surface parameterization is a function that maps coordinates in a 2-dimensional parameter space to points on a surface. This thesis investigates two kinds of parameterizations for surfaces that are disc-like in shape.
Litke, Nathan Jacob
core   +1 more source

Hamilton-Pontryagin Integrators on Lie Groups [PDF]

, 2007
In this thesis structure-preserving time integrators for mechanical systems whose configuration space is a Lie group are derived from a Hamilton-Pontryagin (HP) variational principle.
Bou-Rabee, Nawaf Mohammed
core   +1 more source

Numerical analysis of a relaxed variational model of hysteresis in two-phase solids [PDF]

, 2001
This paper presents the numerical analysis for a variational formulation of rate-independent phase transformations in elastic solids due to Mielke et al.
Carstensen, Carsten, Carsten Carstensen, Plechac, Petr, Petr Plecháč   +3 more
core   +1 more source

Variational semi-blind sparse deconvolution with orthogonal kernel bases and its application to MRFM [PDF]

, 2014
We present a variational Bayesian method of joint image reconstruction and point spread function (PSF) estimation when the PSF of the imaging device is only partially known.
Se Un Parka, Hero, Alfred O., Park, Se Un, Dobigeon, Nicolas, Alfred O. Heroa, Nicolas Dobigeonb   +5 more
core   +1 more source

Vectorial Ekeland Variational Principles and Inclusion Problems in Cone Quasi-Uniform Spaces

Abstract and Applied Analysis, 2012
Some new vectorial Ekeland variational principles in cone quasi-uniform spaces are proved. Some new equivalent principles, vectorial quasivariational inclusion principle, vectorial quasi-optimization principle, vectorial quasiequilibrium principle are ...
Jiang Zhu, Lei Wei, Yeol Je Cho, Cheng Cheng Zhu   +3 more
doaj   +1 more source

Variational Principle for Relative Tail Pressure

Entropy, 2017
We introduce the relative tail pressure to establish a variational principle for continuous bundle random dynamical systems. We also show that the relative tail pressure is conserved by the principal extension.
Xianfeng Ma, Ercai Chen
doaj   +1 more source

A powerful and simple frequency formula to nonlinear fractal oscillators

Journal of Low Frequency Noise, Vibration and Active Control, 2021
In this work, a fractal nonlinear oscillator is successfully established by fractal derivative in a fractal space, and its variational principle is obtained by semi-inverse transform method.
Kang-Le Wang, Chun-Fu Wei
doaj   +1 more source

Generalized Ekeland’s variational principle with applications

Journal of Inequalities and Applications, 2019
By using the concept of Γ-distance, we prove EVP (Ekeland’s variational principle) on quasi-F-metric (q-F-m) spaces. We apply EVP to get the existence of the solution to EP (equilibrium problem) in complete q-F-m spaces with Γ-distances.
Eshagh Hashemi, Reza Saadati, Choonkil Park   +2 more
doaj   +1 more source

A Generalized Variational Principle [PDF]

, 2001
We prove a strong variant of the Borwein-Preiss variational principle, and show that on Asplund spaces, Stegall's variational principle follows from it via a generalized Smulyan test. Applications are discussed.
Philip D. Loewen, Xianfu Wang
core   +1 more source

Variational Principle of the Unstable Nonlinear Schrödinger Equation with Fractal Derivatives

Axioms
The well-known nonlinear Schrödinger equation (NLSE) plays a crucial role in describing the temporal evolution of disturbances in marginally stable or unstable media. However, when the media is a fractal form, it becomes ineffective.
Kang-Jia Wang, Ming Li
doaj   +1 more source