Results 71 to 80 of about 7,979 (231)

An Algorithm for Higher Order Hopf Normal Forms

open access: yesShock and Vibration, 1995
Normal form theory is important for studying the qualitative behavior of nonlinear oscillators. In some cases, higher order normal forms are required to understand the dynamic behavior near an equilibrium or a periodic orbit.
A.Y.T. Leung, T. Ge
doaj   +1 more source

On the Dirichlet problem for a Duffing type equation

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2011
We use direct variational method in order to investigate the dependence on parameter for the solution for a Duffing type equation with Dirichlet boundary value conditions.
Marek Galewski
doaj   +1 more source

Heritage language learners' language availability and choice: A case study of primary school Persian learners in Australia

open access: yesForeign Language Annals, EarlyView.
Abstract This study investigates the factors influencing Persian language learning among heritage language learners in Sydney, Australia, with a particular focus on how formal and informal settings shape language choice and availability. The research employs a qualitative case study approach, incorporating data from student focus groups, semi ...
Mojgan Mokhatebi Ardakani, Dara Tafazoli
wiley   +1 more source

Superconducting Nanowires as Nonlinear Inductive Elements for Qubits

open access: yes, 2010
We report microwave transmission measurements of superconducting Fabry-Perot resonators (SFPR), having a superconducting nanowire placed at a supercurrent antinode.
A. Bezryadin   +6 more
core   +1 more source

Las voces de Baha‐blantes: An analysis of the language learning investment of intermediate students of Spanish at the tertiary level

open access: yesForeign Language Annals, EarlyView.
Abstract This study examines the language learning investment of five intermediate learners of Spanish at a tertiary institution in The Bahamas. It draws on participants’ language learning journeys to consider how their previous experiences and access to language learning opportunities contributed to their investment.
Valentino Rahming
wiley   +1 more source

Weak Signal Detection Method for Millimeter-Wave Sensor Signals Based on Heterodyne Duffing Oscillator

open access: yesMathematics
Millimeter-wave technology helps achieve antenna miniaturization and high gain, but it is limited by factors such as short wavelength, high transmission loss, and high signal-to-noise ratio, which put higher requirements on the accuracy and computing ...
Tai An   +5 more
doaj   +1 more source

On Duffing equation with random perturbations

open access: yesNonlinear Analysis, 2010
We consider a family of particles with different initial states and/or velocities whose dynamics is described by a modified Duffing equation with random perturbations.
A. Ambrazevičius   +2 more
doaj   +1 more source

Analysis of a duffing oscillator that exhibits hysteresis with varying excitation frequency and amplitude [PDF]

open access: yes, 2007
Hysteresis, or jump phenomenon, are a common and severe nonlinear behaviour associated with the Duffing oscillator and the multi-valued properties of the response solution.
Billings, S.A., Li, L.M.
core   +1 more source

Wada property in systems with delay

open access: yes, 2016
Delay differential equations take into account the transmission time of the information. These delayed signals may turn a predictable system into chaotic, with the usual fractalization of the phase space.
Daza, Alvar   +2 more
core   +1 more source

Comprehension of implied meaning in Chinese second language listening

open access: yesForeign Language Annals, EarlyView.
Abstract Listening comprehension is crucial for second language (L2) communication and acquisition. However, it has received less attention than reading, given the transient nature of speech signals and the intangible cognitive processes involved in it.
Jiafan Zhang, Wei Cai
wiley   +1 more source

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