Results 51 to 60 of about 292,102 (216)

Self-Adaptive Implicit Methods for Monotone Variant Variational Inequalities

Journal of Inequalities and Applications, 2009
The efficiency of the implicit method proposed by He (1999) depends on the parameter heavily; while it varies for individual problem, that is, different problem has different "suitable" parameter, which is difficult to find.
Ge Zhili, Han Deren
doaj   +2 more sources

THE METHOD OF SYSTEMATIC VARIATIONS

Soil Science, 1963
info:eu-repo/semantics ...
openaire   +3 more sources

Adaptive thresholding by variational method [PDF]

IEEE Transactions on Image Processing, 1998
When using thresholding method to segment an image, a fixed threshold is not suitable if the background is uneven. Here, we propose a new adaptive thresholding method using variational theory. The method requires only one parameter to be selected and the adaptive threshold surface can be found automatically from the original image.
Chan, FHY, Lam, FK, Zhu, H
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Infinitely many solutions for a Hénon-type system in hyperbolic space

Advances in Difference Equations, 2020
This paper is devoted to studying the semilinear elliptic system of Hénon type {−ΔBNu=K(d(x))Qu(u,v),−ΔBNv=K(d(x))Qv(u,v),u,v∈Hr1(BN),N≥3, $$ \textstyle\begin{cases} -\Delta _{\mathbb{B}^{N}}u= K(d(x))Q_{u}(u,v), \\ -\Delta _{\mathbb{B}^{N}}v= K(d(x))Q_ ...
Patrícia Leal da Cunha, Flávio Almeida Lemos   +1 more
doaj   +1 more source

Polynomial mechanics and optimal control

, 2015
We describe a new algorithm for trajectory optimization of mechanical systems. Our method combines pseudo-spectral methods for function approximation with variational discretization schemes that exactly preserve conserved mechanical quantities such as ...
Srinivasan, Akshay, Venkadesan, Madhusudhan   +1 more
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About existence and regularity of positive solutions for a quasilinear Schrödinger equation with singular nonlinearity

Electronic Journal of Qualitative Theory of Differential Equations, 2020
We establish the existence of positive solutions for the singular quasilinear Schrödinger equation \begin{equation*} \begin{cases} -\Delta u -\Delta (u^{2})u=h(x) u^{-\gamma} + f(x,u)& \mbox{in } \Omega,\\ u(x)=0&\mbox{on }\partial \Omega, \end{cases ...
Ricardo Alves, Mariana Reis
doaj   +1 more source

A Variational Perspective on Accelerated Methods in Optimization

, 2016
Accelerated gradient methods play a central role in optimization, achieving optimal rates in many settings. While many generalizations and extensions of Nesterov's original acceleration method have been proposed, it is not yet clear what is the natural ...
Jordan, Michael I., Wibisono, Andre, Wilson, Ashia C.   +2 more
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The Variate Difference Method

Southern Economic Journal, 1940
Commission's seal on t.-p. ; Bibliographical foot-notes. ; Mode of access: Internet.
Edgar Z. Palmer, Gerhard Tintner
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Hybrid Steepest-Descent Methods for Triple Hierarchical Variational Inequalities

Journal of Function Spaces, 2015
We introduce and analyze a relaxed iterative algorithm by combining Korpelevich’s extragradient method, hybrid steepest-descent method, and Mann’s iteration method.
L. C. Ceng, A. Latif, C. F. Wen, A. E. Al-Mazrooei   +3 more
doaj   +1 more source

Implicit particle methods and their connection with variational data assimilation

, 2012
The implicit particle filter is a sequential Monte Carlo method for data assimilation that guides the particles to the high-probability regions via a sequence of steps that includes minimizations.
Alexandre J. Chorin, Arulampalam, Bennet, Bickel, Buehner, Cappé, Carpenter, Chorin, Chorin, Chorin, Chorin, Chorin, Conn, Cornebise, Courtier, Courtier, Dimet, Doucet, Doucet, Ethan Atkins, Evensen, Evensen, Evensen, Fedorenko, Fertig, Fletcher, Fournier, Geweke, Goodman, Gordon, Hammersley, Hunt, Johansen, Kalman, Kalman, Kalnay, Kalnay, Kalos, Kass, Kass, Kloeden, Kurapov, Liu, Liu, Liu, Liu, Lorenz, Matthias Morzfeld, Miller, Moral, Morzfeld, Morzfeld, Nocedal, Pitt, Rabier, Smith, Smídl, Snyder, Talagrand, Talagrand, Tremolet, van Leeuwen, van Leeuwen, Zupanski   +63 more
core   +3 more sources