Results 91 to 100 of about 231,170 (284)

Normalized solutions for Kirchhoff-type equations with combined nonlinearities: the $L^2$-critical case

open access: yesElectronic Journal of Qualitative Theory of Differential Equations
In this paper, we consider the existence of normalized solutions for the following Kirchhoff-type problem: \begin{equation*} -\left (a+b\int_{\mathbb{R}^{N}}|\nabla u|^{2}dx\right)\Delta u=\lambda u+|u|^{p-2}u+\mu |u|^{q-2}u\quad \mbox{in} \ \mathbb{R}^{
Changlin Liu, Ying Lv, Zeng-Qi Ou
doaj   +1 more source

Suppression of Vibration Using Passive Receptance Method with Constrained Minimization

open access: yesShock and Vibration, 2008
Structural vibration analysis is used to suppress unwanted vibrations in many areas such as aerospace engineering, manufacturing, defense, automotive, etc.
Murat Tursun, Eşref Eşkinat
doaj   +1 more source

Normal‐Appearing White Matter Injury Mediates Chronic Deep Venous Hypoxia and Disease Progression in Multiple Sclerosis

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore how cerebral hypoxia and Normal‐Appearing White Matter (NAWM) integrity affect MS lesion burden and clinical course. Methods Seventy‐nine MS patients, including 13 clinically isolated syndrome (CIS) patients and 66 relapsing–remitting multiple sclerosis (RRMS) patients, and 44 healthy controls (HCs) were recruited from ...
Xinli Wang   +8 more
wiley   +1 more source

A Systematic Comparison of Alpha‐Synuclein Seed Amplification Assays for Increasing Reproducibility

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Seed amplification assays (SAAs) enable ultrasensitive detection of misfolded α‐synuclein across biofluids and tissues. Yet, heterogeneity in protocols limits cross‐study comparability and clinical translation. Here, we review α‐synuclein SAA methods and their performance across various biological matrices.
Manuela Amaral‐do‐Nascimento   +3 more
wiley   +1 more source

Relaxed Viscosity Approximation Methods with Regularization for Constrained Minimization Problems

open access: yesJournal of Applied Mathematics, 2013
We introduce a new relaxed viscosity approximation method with regularization and prove the strong convergence of the method to a common fixed point of finitely many nonexpansive mappings and a strict pseudocontraction that also solves a convex ...
Lu-Chuan Ceng   +2 more
doaj   +1 more source

A New Nonconvex Sparse Recovery Method for Compressive Sensing

open access: yesFrontiers in Applied Mathematics and Statistics, 2019
As an extension of the widely used ℓr-minimization with 0 < r ≤ 1, a new non-convex weighted ℓr − ℓ1 minimization method is proposed for compressive sensing.
Zhiyong Zhou, Jun Yu
doaj   +1 more source

Constrained Minimization Problem for Image Restoration Based on Non-Convex Hybrid Regularization

open access: yesIEEE Access, 2020
It is widely known that the classic total variation(TV) model has been proven to be very effective in preserving sharp edges. However, the TV model suffers from the staircase effects which produce blocking artifacts in the restored images. In this paper,
Jianguang Zhu   +3 more
doaj   +1 more source

Constrained Minimization Under Vector-Valued Criteria in Linear Topological Spaces [PDF]

open access: yes
Constrained minimization under vector valued criteria in linear topological ...
Da Cunha, N. O., Polak, E.
core   +1 more source

A Max-Norm Constrained Minimization Approach to 1-Bit Matrix Completion [PDF]

open access: yes, 2013
We consider in this paper the problem of noisy 1-bit matrix completion under a general non-uniform sampling distribution using the max-norm as a convex relaxation for the rank. A max-norm constrained maximum likelihood estimate is introduced and studied.
Cai, T. Tony, Zhou, Wen-Xin
core   +3 more sources

The Constrained Crossing Minimization Problem [PDF]

open access: yes, 1999
In this paper we consider the constrained crossing minimization problem defined as follows. Given a connected planar graph G = (V,E), a combinatorial embedding II(G) of G, and a set of pairwise distinct edges F ⊆ V × V, find a drawing of G′ = (V,E ∼ F) such that the combinatorial embedding II(G) of G is preserved and the number of edge crossings is ...
Mutzel, P., Ziegler, T.
openaire   +2 more sources

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