Results 21 to 30 of about 105,740 (265)

On the exponential decay of magnetic stark resonances [PDF]

open access: yesReports on Mathematical Physics, 2005
We study the time decay of magnetic Stark resonant states. As our main result we prove that for sufficiently large time these states decay exponentially with the rate given by the imaginary parts of eigenvalues of certain non-selfadjoint operator. The proof is based on the method of complex translations.
Ferrari C.h., KOVARIK, HYNEK
openaire   +5 more sources

Robust Bayesian Fluorescence Lifetime Estimation, Decay Model Selection and Instrument Response Determination for Low-Intensity FLIM Imaging.

open access: yesPLoS ONE, 2016
We present novel Bayesian methods for the analysis of exponential decay data that exploit the evidence carried by every detected decay event and enables robust extension to advanced processing.
Mark I Rowley   +3 more
doaj   +1 more source

Bearing Fault Diagnosis Based on Natural Adaptive Moment Estimation Algorithm and Improved Octave Convolution

open access: yesIEEE Access, 2020
Fault diagnosis of rolling bearing has been the focus of research. Bearing signals are often accompanied by similar information, resulting in redundancy between data.
Mei Ying Qiao   +3 more
doaj   +1 more source

Analysis of Dynamic Characteristics of Tristable Exponential Section of Piezoelectric Energy Harvester

open access: yesEnergies, 2023
Variable-cross-section beams have better mass and strength distribution compared with constant cross-section beams, which can optimize the harvesting power of piezoelectric vibration energy harvesters, which are widely used in self-supplied and low-power
Zhaoxin Cai   +3 more
doaj   +1 more source

Is radioactive decay really exponential? [PDF]

open access: yesEPL (Europhysics Letters), 2012
Radioactive decay of an unstable isotope is widely believed to be exponential. This view is supported by experiments on rapidly decaying isotopes but is more difficult to verify for slowly decaying isotopes. The decay of 14C can be calibrated over a period of 12,550 years by comparing radiocarbon dates with dates obtained from dendrochronology.
openaire   +4 more sources

Self-restricting Noise and Exponential Relative Entropy Decay Under Unital Quantum Markov Semigroups [PDF]

open access: yesQuantum
States of open quantum systems often decay continuously under environmental interactions. Quantum Markov semigroups model such processes in dissipative environments.
Nicholas LaRacuente
doaj   +1 more source

Energy Decay Estimates of a Timoshenko System with Two Nonlinear Variable Exponent Damping Terms

open access: yesMathematics, 2023
This paper is concerned with the asymptotic behavior of the solution of a Timoshenko system with two nonlinear variable exponent damping terms. We prove that the system is stable under some specific conditions on the variable exponent and the equal wave ...
Adel M. Al-Mahdi   +1 more
doaj   +1 more source

Method for analyzing exponential decays [PDF]

open access: yesComputers & Chemistry, 1987
Abstract The non-linear least-squares routine KPS1 is presented for the analysis of data from counting experiments which follow single exponential decays. It gives appropriate weighting to individual points, is compact (52 statements) and converges more rapidly than the widely used CURFIT program of Bevington.
openaire   +2 more sources

Exponential Estimates and Stabilization of Discrete-Time Singular Time-Delay Systems Subject to Actuator Saturation

open access: yesDiscrete Dynamics in Nature and Society, 2012
This paper is concerned with exponential estimates and stabilization of a class of discrete-time singular systems with time-varying state delays and saturating actuators.
Jinxing Lin
doaj   +1 more source

The practical electromagnetic effect in surface-enhanced Raman scattering observed by the lithographically fabricated gold nanosquare dimers

open access: yesAIP Advances, 2020
We experimentally investigated the practical electromagnetic effects in surface-enhanced Raman scattering (SERS), using the precisely fabricated array of gold nanosquare dimers. The array of gold nanosquare dimers was fabricated by electron-beam exposure
Satoshi Kaneko   +4 more
doaj   +1 more source

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