Results 81 to 90 of about 1,822 (256)

Sufficient conditions for nonexistence of gradient blow-up for nonlinear parabolic equations

open access: yesElectronic Journal of Differential Equations, 2007
In this paper we study the initial-boundary value problems for nonlinear parabolic equations without Bernstein-Nagumo condition. Sufficient conditions guaranteeing the nonexistence of gradient blow-up are formulated.
Aris S. Tersenov
doaj  

Universal Conductance Fluctuations in Quantum Anomalous Hall Insulators

open access: yesAdvanced Materials, EarlyView.
Universal conductance fluctuations are observed in mesoscopic quantum anomalous Hall insulators. Two distinct fluctuation patterns are identified, arising from different interference processes of bulk and chiral edge states, respectively. These findings unveil rich quantum interference phenomena in quantum anomalous Hall insulators and provide insights
Peng Deng   +11 more
wiley   +1 more source

Multi-Environmental Reliability Evaluation for Complex Equipment: A Strict Intuitionistic Fuzzy Distance Measure-Based Multi-Attribute Group Decision-Making Framework

open access: yesMachines
The theoretical reliability of complex equipment often significantly deviates from real-world performance due to the inherent influence of diverse environmental and operational factors, making scientific reliability evaluation particularly challenging ...
Zhaiming Peng, Wenhe Chen, Longlong Gao
doaj   +1 more source

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

open access: yesAdvanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

Optimal Control Drives Ultrafast and Energy‐Efficient Magnetization Switching in Van der Waals Magnets

open access: yesAdvanced Materials, EarlyView.
ABSTRACT The accelerating expansion of data‐centric technologies is sharply increasing the energy burden of information storage, placing unprecedented pressure on the efficiency of magnetic switching. Conventional field‐driven reversal, once the foundation of magnetic memory, has become impractical in modern architectures due to its high energy cost ...
Mohammad H. Badarneh   +2 more
wiley   +1 more source

Strictly Archimedean copulas with complete association for multivariate dependence based on the Clayton family

open access: yesDependence Modeling, 2018
The family of Clayton copulas is one of the most widely used Archimedean copulas for dependency measurement. A major drawback of this copula is that when it accounts for negative dependence, the copula is nonstrict and its support is dependent on the ...
Cooray Kahadawala
doaj   +1 more source

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

open access: yesAdvanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Monotone iteration scheme and its application to partial differential equation systems with mixed nonlocal and degenerate diffusions

open access: yesElectronic Journal of Differential Equations, 2019
A monotone iteration scheme for traveling waves based on ordered upper and lower solutions is derived for a class of nonlocal dispersal system with delay.
Qiuling Huang, Xiaojie Hou
doaj  

Strict monotonicity and unique continuation of the biharmonic operator

open access: yesBoletim da Sociedade Paranaense de Matemática, 2012
Summary: In this paper, we will show that the strict monotonicity of the eigenvalues of the biharmonic operator holds if and only if some unique continuation property is satisfied by the corresponding eigenfunctions.
Najib Tsouli   +3 more
openaire   +2 more sources

Strict monotonous asymptotic energetic stability. Part I: Theory

open access: yesIFAC Proceedings Volumes, 1999
Abstract The concept of strict monotonous asymptotic energetic stability (SMAES) of an equilibrium state of a time invariant nonlinear dynamic system is introduced by defining also energetic stability, energetic attraction and strict monotonous energetic attraction, as well as their domains, in a Lyapunov sense. The concept is important because it is
Lyubotnir T. Gruyitch   +1 more
openaire   +1 more source

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