Results 21 to 30 of about 12,126,899 (315)

Sharp Bounds of Hankel Determinant on Logarithmic Coefficients for Functions Starlike with Exponential Function

open access: yesFractal and Fractional, 2022
Using the Lebedev–Milin inequalities, bounds on the logarithmic coefficients of an analytic function can be transferred to estimates on coefficients of the function itself and related functions.
Lei Shi   +4 more
doaj   +1 more source

Expoential bounds on the number of causal triangulations [PDF]

open access: yes, 2014
We prove that the number of combinatorially distinct causal 3-dimensional triangulations homeomorphic to the 3-dimensional sphere is bounded by an exponential function of the number of tetrahedra.
Durhuus, Bergfinnur, Jonsson, Thordur
core   +1 more source

Soliton Solutions of Mathematical Physics Models Using the Exponential Function Technique

open access: yesSymmetry, 2020
This paper is based on finding the exact solutions for Burger’s equation, Zakharov-Kuznetsov (ZK) equation and Kortewegde vries (KdV) equation by utilizing exponential function method that depends on the series of exponential functions.
Shumaila Javeed   +6 more
semanticscholar   +1 more source

The Jacobian of the Exponential Function

open access: yesJournal of Economic Dynamics and Control, 2020
We derive closed-form expressions for the Jacobian of the matrix exponential function for both diagonalizable and defective matrices. The results are applied to two cases of interest in macroeconometrics: a continuous-time macro model and the ...
J. Magnus, H. Pijls, Enrique Sentana
semanticscholar   +1 more source

A Sensitive and Versatile Thickness Determination Method Based on Non-Inflection Terahertz Property Fitting

open access: yesSensors, 2019
The accuracy of thin-film characterization in terahertz spectroscopy is mainly set by the thickness uncertainty. Physical thickness measurement has limited accuracy for thin-film samples thinner than a few hundreds of micrometers and is sometimes even ...
Xuequan Chen, Emma Pickwell-MacPherson
doaj   +1 more source

Improved Convolutional Neural Network Based on Fast Exponentially Linear Unit Activation Function

open access: yesIEEE Access, 2019
The activation functions play increasingly important roles in deep convolutional neural networks. The traditional activation functions have some problems such as gradient disappearance, neuron death and output offset, and so on.
Zheng Qiumei, Tan Dan, Wang Fenghua
doaj   +1 more source

Optimal PV Parameter Estimation via Double Exponential Function-Based Dynamic Inertia Weight Particle Swarm Optimization

open access: yes, 2020
Parameters associated with electrical equivalent models of the photovoltaic (PV) system play a significant role in the performance enhancement of the PV system.
Arooj Tariq Kiani   +5 more
semanticscholar   +1 more source

A symmetrical exponential model of soil temperature in temperate steppe regions of China

open access: yesOpen Geosciences, 2023
Global warming has caused changes in various ecological processes and has potential to change ecosystems’ stability. In spite of comprehensive studies to investigate air temperatures under global warming, much less is known about changes in soil ...
Zhang Hui   +5 more
doaj   +1 more source

Convolutions involving the exponential function and the exponential integral [PDF]

open access: yesMathematica Moravica, 2015
The exponential integral ei(λx) and its associated functions ei+(λx) and ei-(λx) are defined as locally summable functions on the real line and their derivatives are found as distributions.
Fisher Brian, Al-Sirehy Fatma
doaj  

Periodic solutions in multivariate invariance arguments [PDF]

open access: yesOpuscula Mathematica, 2013
Inspired by the recent results of A. E. Abbas we determine continuous multivariate utility functions invariant with respect to a wide family of transformations related to the shift transformations.
Jacek Chudziak, Sebastian Wójcik
doaj   +1 more source

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