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Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, 11/2013, Volume 345, pp. 36 - 40
Journal Article
Review of Scientific Instruments, ISSN 0034-6748, 11/2018, Volume 89, Issue 11, p. 113903
The microwave cavity perturbation method is often used to determine material parameters (electric permittivity and magnetic permeability) at high frequencies,... 
INSTRUMENTS & INSTRUMENTATION | PHYSICS, APPLIED | SPECTROSCOPY | CONDUCTIVITY | CAVITY PERTURBATION TECHNIQUE | MICROWAVE | MODE | NOISE | OSCILLATOR | Time dependence | Fourier transforms | Feedback circuits | Perturbation methods | Magnetic permeability | Feedback | Magnetic resonance | Cavity resonators | Bandpass filters | Parameter sensitivity | Resonators | Physics - Applied Physics
Journal Article
New Journal of Physics, ISSN 1367-2630, 09/2015, Volume 17, Issue 9, p. 93039
We derive a systematic high-frequency expansion for the effective Hamiltonian and the micromotion operator of periodically driven quantum systems. Our approach... 
Floquet theory | ultracold quantum gases | quantum engineering | Perturbation theory | Operators | Broken symmetry | Approximation | Equivalence | Mathematical analysis | Blocking | Quantum theory
Journal Article
PHYSICAL REVIEW LETTERS, ISSN 0031-9007, 05/2011, Volume 106, Issue 21, p. 210801
We present a comprehensive study of the frequency shifts associated with the lattice potential in a Sr lattice clock by comparing two such clocks with a... 
PHYSICS, MULTIDISCIPLINARY | FERMIONS | Physics - Atomic Physics | ATOMIC CLOCKS | TENSORS | DISTURBANCES | RECOILS | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS | STABILITY | INTERACTIONS | ACCURACY | STRONTIUM | ALKALINE EARTH METALS | ELEMENTS | METALS | PERTURBATION THEORY | VECTORS
Journal Article
Computers and Mathematics with Applications, ISSN 0898-1221, 05/2010, Volume 59, Issue 9, pp. 3222 - 3228
In this paper, He's Frequency-Amplitude Formulation (HFAF) and He's Energy Balance Method (HEBM) are employed to solve the generalized Duffing equation in the... 
He's frequency-amplitude formulation | Generalized Duffing equation | He's energy balance method | Nonlinear vibration | MATHEMATICS, APPLIED | HOMOTOPY PERTURBATION METHOD
Journal Article
Journal of Experimental Biology, ISSN 0022-0949, 12/2018, Volume 221, Issue 23, p. jeb.188565
When flying in a group, echolocating bats have to separate their own echoes from pulses and echoes belonging to other individuals to extract only the... 
Bats | Terminal frequency | Jamming avoidance response | AVOIDANCE-RESPONSE | PERTURBATIONS | DISCRIMINATION | BIOLOGY | FEEDBACK | BIG BROWN BATS
Journal Article
Astrophysical Journal, ISSN 0004-637X, 07/2014, Volume 789, Issue 2, pp. 1 - 6
A transiting planet exhibits sinusoidal transit time variations (TTVs) if perturbed by a companion near a mean-motion resonance. We search for sinusoidal TTVs... 
Planets | Transit time | Planet detection | Searching | Dynamics | Mathematical models | Dynamical systems | Transit | PLANETS | VARIATIONS | MULTIPLICITY | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | PERTURBATION THEORY | COMPARATIVE EVALUATIONS | VISIBLE RADIATION
Journal Article
Journal of Fluid Mechanics, ISSN 0022-1120, 02/2013, Volume 716, pp. 189 - 202
The linear amplification of axisymmetric external forcing in incompressible jet flows is investigated within a fully non-parallel framework. Experimental and... 
wakes/jets | instability | jets | OPTIMAL DISTURBANCES | ABSOLUTE | MECHANICS | PHYSICS, FLUIDS & PLASMAS | STABILITY | FLOW | Fluid mechanics | Turbulence | Turbulent flow | Amplification | Incompressible flow | Computational fluid dynamics | Perturbation methods | Mathematical analysis | Strouhal number | Fluid flow | Jets | Mechanics | Mechanics of the fluids | Fluids mechanics | Engineering Sciences | Physics
Journal Article
Journal of Low Frequency Noise, Vibration and Active Control, ISSN 1461-3484, 12/2019, Volume 38, Issue 3-4, pp. 1008 - 1012
Fractional oscillators can effectively deal with noise in the vibration. This paper adopts He’s fractional derivative, which is defined through the variational... 
Duffing equation | fractional complex transform | Fractional calculus | variational iteration method | ACOUSTICS | DIFFERENTIAL-EQUATIONS | TIME | HOMOTOPY PERTURBATION METHOD | Duffing oscillators | Iterative algorithms | Amplitudes | Microphysics
Journal Article