Results 111 to 120 of about 2,117,198 (290)

$k$-Contraction in a Generalized Lurie System [PDF]

open access: yes, 2023
We derive a sufficient condition for $k$-contraction in a generalized Lurie system, that is, the feedback connection of a nonlinear dynamical system and a memoryless nonlinear function.
Ofir, Ron   +2 more
core  

Mechanistic Origins of Chemo‐Mechanical Instability and Failure in Solid‐State Lithium‐Sulfur Electrodes

open access: yesAdvanced Functional Materials, EarlyView.
Conversion‐induced sulfur expansion generates strong mechanical constraints and localized stresses within solid‐state Li‐S cathodes. Heterogeneous solid‐electrolyte confinement creates tensile strain‐energy hotspots that govern particle cracking. Larger sulfur particles accelerate fracture, while higher porosity relaxes constraint and delays damage ...
Arpan K. Sharma   +3 more
wiley   +1 more source

Common Attractors for Generalized F-Iterated Function Systems in G-Metric Spaces

open access: yesFractal and Fractional
In this paper, we study the generalized F-iterated function system in G-metric space. Several results of common attractors of generalized iterated function systems obtained by using generalized F-Hutchinson operators are also established.
Talat Nazir, Sergei Silvestrov
doaj   +1 more source

On Coupled Fixed Point Theorems for Nonlinear Contractions in Partially Ordered -Metric Spaces

open access: yesAbstract and Applied Analysis, 2012
Two concepts—one of the coupled fixed point and the other of the generalized metric space—play a very active role in recent research on the fixed point theory.
S. A. Mohiuddine, Abdullah Alotaibi
doaj   +1 more source

Ga–O–Pt Electronic Bridges Bypass Single‐Site Constraints for pH‐Universal Hydrogen Evolution

open access: yesAdvanced Functional Materials, EarlyView.
Well‐defined oxygen‐bridged Ga–O–Pt catalysts are constructed for pH‐universal hydrogen evolution, highlighting the relationship between oxygen‐bridged electronic coupling, rapid surface hydrogen redistribution, and superior catalytic performance. ABSTRACT Single‐site descriptors often fail to capture hydrogen evolution on heterometallic interfaces ...
Rui Wang   +8 more
wiley   +1 more source

Exact controllability of generalized conformable integrodifferential system via contraction mapping theorem

open access: yesResults in Control and Optimization
The present work addresses the exact controllability problem of integrodifferential systems involving generalized conformable derivatives. The necessary and sufficient conditions of exact controllability for generalized conformable control linear systems
Maher Jneid, Rola Masri
doaj   +1 more source

Lone‐Pair‐Induced Lattice Distortion in Lead‐Free Hybrid Perovskites for High‐Performance Nanogenerators

open access: yesAdvanced Functional Materials, EarlyView.
A lead‐free tin‐based hybrid perovskite is designed in which stereochemically active lone‐pair electrons on tin distort the crystal lattice and break its symmetry. Blended into a flexible polymer, the material converts pressure into electricity at milliwatt‐scale power density and continues working far below freezing, powering a commercial wristwatch ...
Majid Haji Bagheri   +12 more
wiley   +1 more source

The contraction mapping principle [PDF]

open access: yes, 1986
In the world of mathematics, it is often necessary to approximate the solution to a problem by using an iterative method. One such method, not totally dependent on the initial guess, is the contraction mapping method.
Rosenbloom, Elaine
core   +1 more source

GeS as an Emerging OTS Material: Atomic Structure and Modeling of ON/OFF Switching

open access: yesAdvanced Functional Materials, EarlyView.
The structural puzzle of glassy GeS, an advanced memory‐selector material, has finally been disentangled, revealing a patchwork of mixed tetrahedral and trigonal species. Under a high electric field, over‐ and under‐coordinated Ge and S defects, together with three‐membered rings, form an interconnected network associated with localized and extended ...
Andrey Tverjanovich   +13 more
wiley   +1 more source

Fixed Point of Almost Contraction in b-Metric Spaces

open access: yes, 2020
In this paper, we introduce a generalized multivalued (α, L)-almost contraction in the b-metric space. Furthermore, we prove the existence and uniqueness of the fixed point for a specific mapping.
Ozgur Ege   +7 more
core   +1 more source

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