Results 21 to 30 of about 1,782,949 (343)
Applying Symmetries to Solving a Nonlinear Acoustics Beam Model [PDF]
Mathematics Interdisciplinary Research, 2022 For an important nonlinear acoustic model, the (2+1)-dimensional Zabolotskaya–Khokhlov(ZK), a symmetry group and the optimal systems of the symmetry subalgebra have been introduced.
Leila Hamedi Mobarra
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Symmetry analysis and hidden variational structure of Westervelt's equation in nonlinear acoustics [PDF]
Communications in nonlinear science & numerical simulation, 2022 Westervelt's equation is a nonlinear wave equation that is widely used to model the propagation of sound waves in a compressible medium, with one important application being ultra-sound in human tissue.
S. Anco +3 more
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Analysis of General Shape Optimization Problems in Nonlinear Acoustics [PDF]
Applied Mathematics and Optimization, 2021 In various biomedical applications, precise focusing of nonlinear ultrasonic waves is crucial for efficiency and safety of the involved procedures. This work analyzes a class of shape optimization problems constrained by general quasi-linear acoustic ...
M. Meliani, Vanja Nikolic
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Applied Sciences, 2023 The aim of this paper is to optimize the generation of frequencies obtained nonlinearly from the propagation of ultrasound in a bubbly liquid. A study is presented for which the number and size of the gas bubbles in the liquid are varied to determine the
María Teresa Tejedor Sastre +1 more
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AIP Advances, 2021 Nonlinear lattices and the nonlinear acoustics they support have a broad impact on shock and vibration mitigation, sound isolation, and acoustic logic devices.
A. Kanj +4 more
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An improved time reversal mirror based on standard linear frequency modulation waveform
Scientific Reports, 2021 Time reversal mirror (TRM) technology is the adaptive focusing method evolved from the phase conjugate method in optics. Conventional incentive method in TRM technology is a narrow pulse signal with a high bandwidth.
Yongkang Wang +4 more
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Acta Acustica, 2022 Scientific advice for governmental management of marine resources relies on acoustical observation methods. Quantification and identification of fish and plankton species are often achieved using multi-frequency acoustic data.
Pedersen Audun O. +3 more
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Parabolic Approximation of Quasilinear Wave Equations with Applications in Nonlinear Acoustics [PDF]
SIAM Journal on Mathematical Analysis, 2020 This work deals with the convergence analysis of parabolic perturbations to quasilinear wave equations on smooth bounded domains. In particular, we consider wave equations with nonlinearities of quadratic type, which cover the two classical models of ...
B. Kaltenbacher, Vanja Nikoli'c
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Nonlinear acoustics methods in the investigations of elastic wave interactions in the ocean [PDF]
E3S Web of Conferences, 2019 Hydroacoustic parametric systems and methods of nonlinear acoustics in the investigation of the Ocean and the Arctic shelf are considered. A short description of the most promising directions of development of hydroacoustic systems with parametric ...
Tarasov Sergei +3 more
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Approach to nonlinearity parameter in liquids calculation based on the scaling theory of thermodynamic fluctuations [PDF]
Известия высших учебных заведений: Прикладная нелинейная динамика, 2023 The nonlinearity parameter B/A is a characteristic of liquids and soft matter, which gains growing attention due to its sensibility to the composition of materials.
Belenkov, Roman N, Postnikov, Eugene B
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