Results 1 to 10 of about 317,582 (250)

Oscillation Criteria for Functional Dynamic Equations with Nonlinearities Given by Riemann-Stieltjes Integral [PDF]

open access: goldAbstract and Applied Analysis, 2014
We present new oscillation criteria for the second order nonlinear dynamic equation [r(t)ϕγ(xΔ(t))]Δ+q0(t)ϕγ(x(g0(t)))+∫ab‍q(t,s)ϕα(s)(x(g(t,s)))Δζ(s)=0 under mild assumptions.
Yuangong Sun, Taher S. Hassan
doaj   +2 more sources

The evolution of manipulative cheating

open access: yeseLife, 2022
A social cheat is typically assumed to be an individual that does not perform a cooperative behaviour, or performs less of it, but can still exploit the cooperative behaviour of others.
Ming Liu, Stuart Andrew West, Geoff Wild
doaj   +1 more source

Experimental and Theoretical Reproducibility Research on the Earthquake Resistance of Cylindrical Steel Tanks

open access: yesVibration, 2023
This article analyzes the convergence of the obtained values as a result of the authors’ earlier experimental and theoretical studies. On the basis of the correlations, it was found that the analyses of a traditional cylindrical steel tank without a ...
Nurlan Zhangabay   +4 more
doaj   +1 more source

Coupling characteristic analysis of power system frequency dynamic and power angle oscillation

open access: yes电力工程技术, 2023
For the analysis of the coupling characteristics of the power system frequency dynamic and power angle oscillation, the mechanism of the two-machine system under disturbances is derived in this paper, and the mechanism of the multi-machine system is ...
MA Ruicong   +5 more
doaj   +1 more source

Dynamics of the Selkov oscillator [PDF]

open access: yesMathematical Biosciences, 2018
A classical example of a mathematical model for oscillations in a biological system is the Selkov oscillator, which is a simple description of glycolysis. It is a system of two ordinary differential equations which, when expressed in dimensionless variables, depends on two parameters.
Pia Brechmann, Alan D. Rendall
openaire   +4 more sources

Stability analysis of sub‐synchronous oscillation in power system connected with virtual synchronous DFIGs

open access: yesIET Renewable Power Generation, 2021
Concerning sub‐synchronous oscillation in power system connected with virtual synchronous DFIGs, an oscillatory stability analysis method based on the dissipation rate of dynamic energy is proposed.
Jing Ma   +3 more
doaj   +1 more source

Frictional behavior of planar and rough granite fractures subjected to normal load oscillations of different amplitudes

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2022
The dynamic frictional behaviors of natural discontinuities (joints, fractures, faults) play an important role in geohazards assessment; however, the mechanisms of the dynamic fault weakening/strengthening are still unclear.
Wengang Dang, Kang Tao, Xinfan Chen
doaj   +1 more source

Frictional sliding of infilled planar granite fracture under oscillating normal stress

open access: yesInternational Journal of Mining Science and Technology, 2023
This paper investigates the frictional behavior of the infilled rock fracture under dynamic normal stress. A series of direct shear tests were conducted on saw-cut granite fractures infilled with quartz using a self-developed dynamic shear apparatus, and
Kang Tao, Wengang Dang, Yingchun Li
doaj   +1 more source

Oscillatory Behaviour of the Nonlinear Damped Fractional Partial Dynamic Equation

open access: yesAdvances in Mathematical Physics, 2022
In this paper, a partial dynamic equation of fractional order is considered with Neumann and Dirichlet boundary conditions, and we studied the oscillation properties of the fractional partial dynamic equation on time scales.
R. Ramesh   +3 more
doaj   +1 more source

Dynamics of Multifrequency Oscillator Communities [PDF]

open access: yesPhysical Review Letters, 2013
We consider a generalization of the Kuramoto model of coupled oscillators to the situation where communities of oscillators having essentially different natural frequencies interact. General equations describing possible resonances between the communities' frequencies are derived.
Komarov, Maxim   +1 more
openaire   +4 more sources

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