Results 1 to 10 of about 7,484 (167)

Theoretical model of donor–donor and donor–acceptor energy transfer on a nanosphere [PDF]

Scientific Reports
In this study, we introduce a novel advancement in the field of theoretical exploration. Specifically, we investigate the transfer and trapping of electronic excitations within a two-component disordered system confined to a finite volume.
Anna Synak, Leszek Kułak, Piotr Bojarski   +2 more
doaj   +2 more sources

General model of nonradiative excitation energy migration on a spherical nanoparticle with attached chromophores [PDF]

Scientific Reports
Theory of multistep excitation energy migration within the set of chemically identical chromophores distributed on the surface of a spherical nanoparticle is presented.
L. Kułak, A. Schlichtholz, P. Bojarski
doaj   +2 more sources

Colebrook’s Flow Friction Explicit Approximations Based on Fixed-Point Iterative Cycles and Symbolic Regression

Computation, 2019
The logarithmic Colebrook flow friction equation is implicitly given in respect to an unknown flow friction factor. Traditionally, an explicit approximation of the Colebrook equation requires evaluation of computationally demanding transcendental ...
Dejan Brkić, Pavel Praks
doaj   +1 more source

Modified two-dimensional differential transform method for solving proportional delay partial differential equations

Results in Control and Optimization
In this study, we develop a modified version of the two-dimensional differential transform (TDDT) method for solving proportional delay partial differential equations (PDPDEs) that frequently arise in engineering and scientific models.
Osama Ala’yed
doaj   +1 more source

Padé Approximant Neural Networks as Feature Extractors for Unsupervised Domain Adaptation in Bearing Fault Diagnosis

Machines
Variations in mechanical load constitute a dominant source of domain shift in data-driven fault diagnosis of rotating machinery, causing models trained under one operating condition to degrade sharply when deployed under another.
Sertac Kilickaya, Cansu Celebioglu, Murat Askar, Turker Ince, Levent Eren   +4 more
doaj   +1 more source

Improving the five-point bootstrap

Journal of High Energy Physics
We present a new algorithm for the numerical evaluation of five-point conformal blocks in d-dimensions, greatly improving the efficiency of their computation.
David Poland, Valentina Prilepina, Petar Tadić   +2 more
doaj   +1 more source

A new magnitude–redshift relation based on Type Ia supernovae

Astronomy & Astrophysics
We present a new empirical relation between the standardised magnitude (m) of Type Ia supernovae (SNe Ia) and redshift (z). Using the Pantheon+ sample and the Dark Energy Survey (DES) five-year sample (DES-SN5YR), we find a negative linear correlation ...
Rodríguez Ósmar, Clocchiatti Alejandro
doaj   +1 more source

Theoretical Characterization of Latencies in the Wide-Synchronization Control for Oscillations Damping

Electricity
Wide-area damping controls, like the wide-synchronization control (WSC), are crucial for power system stability but are vulnerable to communication latencies. This article presents a comprehensive theoretical characterization of the impact of time delays
Rossano Musca, Maria Luisa Di Silvestre, Liliana Mineo, Salvatore Favuzza   +3 more
doaj   +1 more source

A high-order finite difference scheme incorporating analytical absorbing boundary conditions for variable-order time-fractional diffusion equations on unbounded domains

Partial Differential Equations in Applied Mathematics
We propose a new numerical method to solve nonlinear parabolic diffusion problems with a time dependent Caputo fractional derivative in an unbounded spatial domain.
Seyed Ali Ghanizadeh, Mohammad Hossein Akrami   +1 more
doaj   +1 more source

Padé approximant

Scholarpedia, 2012
openaire   +1 more source