Results 61 to 70 of about 6,876 (298)

Fractional dynamical model for the generation of ECG like signals from filtered coupled Van-der Pol oscillators

open access: yes, 2013
In this paper, an incommensurate fractional order (FO) model has been proposed to generate ECG like waveforms. Earlier investigation of ECG like waveform generation is based on two identical Van-der Pol (VdP) family of oscillators, which are coupled by ...
Das, Saptarshi, Maharatna, Koushik
core   +1 more source

Rapid screening of staphylokinase protein variants using an unpurified cell‐free expression system

open access: yesFEBS Open Bio, EarlyView.
An unpurified cell‐free protein synthesis (CFPS) platform enables rapid functional screening of staphylokinase variants. Direct plasminogen‐activation assays performed in microplate format provide real‐time activity readouts, allowing rapid identification and ranking of variants with improved or reduced fibrinolytic activity without protein ...
Maria Tomková   +3 more
wiley   +1 more source

Fractional powers of generators of equicontinuous semigroups and fractional derivatives [PDF]

open access: yesJournal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics, 1989
AbstractWe analyze fractional powersHα, α > 0, of the generatorsHof uniformly bounded locally equicontinuous semigroupsS. TheHαare defined as the αth derivative δαof the Dirac measure δ evaluated onS. We demonstrate that theHαare closed operators with the natural properties of fractional powers, for example,HαHβ=Hα+βfor α, β > 0, and (Hα)β=Hαβfor
Oscar E. Lanford, Derek W. Robinson
openaire   +1 more source

Bernstein Operational Matrix for Solving Variable Order Fractional Differential Equations with Generalized Caputo-Type

open access: yesWasit Journal for Pure Sciences
In this research, we present novel generalized derivative founded on the newly constructed (NGCFVODs) novel generalized Caputo  Fractional variable order derivatives.
alaa abbas
doaj   +1 more source

Some Antiperiodic Boundary Value Problem for Nonlinear Fractional Impulsive Differential Equations

open access: yesAbstract and Applied Analysis, 2014
This paper is concerned with the sufficient conditions for the existence of solutions for a class of generalized antiperiodic boundary value problem for nonlinear fractional impulsive differential equations involving the Riemann-Liouville fractional ...
Xianghu Liu, Yanfang Li
doaj   +1 more source

On applications of Caputo k-fractional derivatives

open access: yesAdvances in Difference Equations, 2019
This research explores Caputo k-fractional integral inequalities for functions whose nth order derivatives are absolutely continuous and possess Grüss type variable bounds. Using Chebyshev inequality (Waheed et al. in IEEE Access 7:32137–32145, 2019) for
Ghulam Farid   +5 more
doaj   +1 more source

Solution of the Generalized Burgers Equation Using Homotopy Perturbation Method with General Fractional Derivative

open access: yes, 2023
This research paper introduces the generalized Burgers equation, a mathematical model defined using the general fractional derivative, the most recent operator in fractional calculus. The general fractional derivative can be reduced into three well-known
Awatif Muflih Alqahtani
core   +1 more source

Molecular dynamics simulations of positively selected codons in FcγRI reveal novel biochemical binding properties

open access: yesFEBS Open Bio, EarlyView.
Evolutionary analysis across 32 placental mammals identified positive selection at residues H148 and W149 in the immune receptor FcγR1. Ancestral reconstruction combined with molecular dynamics simulations reveals how these mutations may influence receptor structure and dynamics, providing insight into the evolution of antibody recognition and immune ...
David A. Young   +7 more
wiley   +1 more source

Generalized Euler-Lagrange Equations for Fuzzy Fractional Variational Problems under gH-Atangana-Baleanu Differentiability

open access: yesJournal of Function Spaces, 2018
We study in this paper the Atangana-Baleanu fractional derivative of fuzzy functions based on the generalized Hukuhara difference. Under the condition of gH-Atangana-Baleanu fractional differentiability, we prove the generalized necessary and sufficient ...
Jianke Zhang   +3 more
doaj   +1 more source

Generalized GL Fractional Derivative and Its Laplace and Fourier Transform

open access: yes, 2009
It is well known the difficulties that the Riesz fractional derivative present, as the spatial fractional derivative involved in many models of the dynamics of anomalous processes.
Manuel D. Ortigueira, Juan J. Trujillo
core   +1 more source

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