1,721,058 research outputs found
On some nonlinear boundary value problem on the Poincaré disc with discontinuos data - I
No full textInverse scattering in the resonance region: the reconstruction of obstacles and inhomogeneous media
No full text"A two currency yeld-factor model of interest rates.” Quaderno Istituto De.F.In. N. 5 - Anno III- ANCONA- 2003
No full textThree dimensional time harmonic acoustic and electromagnetic inverse scattering in the resonance region
No full textBoundary layers and non-linear vibrations in an axially moving beam
No full textThe non-linear oscillations of a one-dimensional axially moving beam with vanishing flexural stiffness and weak non-linearities are analysed. The solution of the initial-boundary value problem for the partial differential equation that describes the motion of the beam when two parameters related to the flexural stiffness and the non-linear terms vanish is expanded into a perturbative double series. Two singular perturbation effects due to the small flexural stiffness and to the weak non-linear terms arise: (i) a boundary layer effect when the flexural stiffness vanishes, (ii) a secular effect. Some tests are performed to compare the first order perturbative solution with an approximate solution obtained by a finite difference scheme. The effect of the oscillation amplitude combined with the presence of small bending stiffness and axial transport velocity is investigated enlighting some interesting aspects of axially moving systems. The value of the perturbative series as a computational tool is shown
The inverse gravimetry problem: an application to the northern San Francisco craton granite
No full textAn inverse problem for the three dimensional vector Helmholtz equation for a perfectly conducting obstacle with incomplete data
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"On some nonlinear boundary value problem on the Poincaré disc with discontinuous data II"
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