Results 101 to 110 of about 11,355 (304)
Variational principles and fixed point theorems
, 2012 The paper concerns fundamental variational principles and the Caristi fixed point theorem. The Brézis–Browder theorem is extended and Altmanʼs theorem is investigated. The notion of istance, an extension of ω-distance, is defined. The new concept enables
Pasicki, Lech
core +1 more source
Advanced Engineering Materials, EarlyView.Trace additions of Sn and Sr combined with a two‐step aging treatment are shown to enhance the microstructure and performance of Al–Zr–Sc conductor alloys. Strength and electrical conductivity increase concurrently through accelerated precipitation of fine Al3(Sc, Zr) precipitates and improved dislocation resistance, offering a cost‐effective pathway ...
Quan Shao +3 more
wiley +1 more source
Variational principles for eigenvalues of the Klein-Gordon equation
, 2006 In this paper variational principles for eigenvalues of an abstract model of the Klein-Gordon equation with electromagnetic potential are established. They are used to characterize and estimate eigenvalues in cases where the essential spectrum has a gap ...
Matthias Langer +4 more
core +1 more source
Near‐Field Electrospinning Micro‐Printhead Achieves Precise Control of Nanofiber Deposition
Advanced Engineering Materials, EarlyView.A micro‐printhead for near‐field electrospinning enables reproducible deposition of polymer nanofibers with diameters below 50 nm. Systematic parameter studies uncover the mechanisms linking operating conditions to fiber morphology, paving the way for precise and low‐cost nanoscale 3D manufacturing.As a high‐resolution, cost‐effective, and rapid ...
Han Xu, Dario Mager, Jan G. Korvink
wiley +1 more source
Variational Principles in Curve Design
Journal of Complexity, 1993 In the Hermite interpolation problem for vector-valued functions on a partitioned interval \([a,b]\) a functional \(I\) is defined on the space of interpolatory functions. It uses function values and integrals of the functions and their derivatives. The paper characterizes those interpolating functions which have a minimal value of \(I\) as piecewise ...
openaire +2 more sources
Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
Фізика і хімія твердого тілаThe theory of diffusion processes in solids has achieved significant results in recent decades, but the development of methods for calculating diffusion in a multicomponent thermodynamic system is still an urgent task.
S. Bobyr, J. Odqvist
doaj +1 more source
Unified expressions of all integral variational principles
, 2006 In terms of the quantitative causal principle, this paper obtains a general variational principle, gives unified expressions of the general, Hamilton, Voss, Holder, Maupertuis-Lagrange variational principles of integral style, the invariant quantities of
Huang, YC, Shao, MX, Lee, XG
core
Variational Principles with Linear Growth
, 1989 Hardt, Robert; Kinderlehrer, David. (1989). Variational Principles with Linear Growth.
Hardt, Robert +3 more
core +1 more source
Variational principles for multisymplectic second-order classical field theories [PDF]
, 2015 We state a unified geometrical version of the variational principles for second-order classical field theories. The standard Lagrangian and Hamiltonian variational principles and the corresponding field equations are recovered from this unified framework.
Prieto Martínez, Pedro Daniel +1 more
core +1 more source