Results 11 to 20 of about 4,543,260 (298)
High frequency difraction by a soft circular disc. I the plane wave at normal incidence [PDF]
, 1971 The far scattered field off the axis of symmetry of the disc is found for a high frequency, harmonic, normally incident, plane wave. The method used is due to Jones and involves the solution of a singular integral equation of the first kind for the field
Newby, J C
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Fractional Differential Equation-Based Instantaneous Frequency Estimation for Signal Reconstruction
Fractal and Fractional, 2021 In this paper, we propose a fractional differential equation (FDE)-based approach for the estimation of instantaneous frequencies for windowed signals as a part of signal reconstruction.
Bilgi Görkem Yazgaç, Mürvet Kırcı
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On Propagation of Rayleigh Type Surface Wave in Five Different Theories of Thermoelasticity
International Journal of Applied Mechanics and Engineering, 2019 The governing equations for a homogeneous and isotropic thermoelastic medium are formulated in the context of coupled thermoelasticity, Lord and Shulman theory of generalized thermoelasticity with one relaxation time, Green and Lindsay theory of ...
B. Singh, S. Verma
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Industria: Jurnal Teknologi dan Manajemen Agroindustri, 2022 Moringa leaves are a source of high antioxidants. This study aims to find an equation model for the extraction conditions of Moringa leaves with Pulsed Electric Field (PEF) pretreatment.
Sukardi Sukardi +2 more
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High Frequency limit of the Helmholtz Equations
Revista Matemática Iberoamericana, 2002 We derive the high frequency limit of the Helmholtz equations in terms of quadratic observables. We prove that it can be written as a stationary Liouville equation with source terms. Our method is based on the Wigner Transform, which is a classical tool for evolution dispersive equations.
Benamou, Jean-David +3 more
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Free linear vibrations of a viscoelastic spherical shell with filler [PDF]
Известия высших учебных заведений: Прикладная нелинейная динамикаPurpose. Thin multilayered shells are widely used in aviation, shipbuilding, and mechanical engineering. Recently, interest in the dynamic analysis of shell structures under various load effects has increased.
Mirsaidov, Mirziyod Mirsaidovich +3 more
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Solution to a Damped Duffing Equation Using He’s Frequency Approach
The Scientific World Journal, 2022 In this paper, we generalize He’s frequency approach for solving the damped Duffing equation by introducing a time varying amplitude. We also solve this equation by means of the homotopy method and the Lindstedt–Poincaré method.
Alvaro H. S. Salas +2 more
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On the generalized Jacobi equation. [PDF]
, 2008 The standard text-book Jacobi equation (equation of geodesic deviation) arises by linearizing the geodesic equation around some chosen geodesic, where the linearization is done with respect to the coordinates and the velocities.
Perlick, Volker
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Resonant and antiresonant frequencies of multiple cracked bar
Vietnam Journal of Mechanics, 2019 The natural frequencies or related resonant frequencies have been widely used for crack detection in structures by the vibration-based technique. However, antiresonant frequencies, the zeros of frequency response function, are less involved to use for ...
P. T. B. Lien, N. T. Khiem
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The Differential Equation of the Distribution of Gene Frequencies [PDF]
Proceedings of the National Academy of Sciences, 1945 Not ...
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