Now showing items 1-7 of 7

    • Dynamical systems and Poisson structures 

      Gurses, M.; Guseinov, G. Sh.; Zheltukhin, K. (American Institute of Physics, 2009)
      We first consider the Hamiltonian formulation of n=3 systems, in general, and show that all dynamical systems in ℝ3 are locally bi-Hamiltonian. An algorithm is introduced to obtain Poisson structures of a given dynamical ...
    • On the classification of Darboux integrable chains 

      Habibullin, I.; Zheltukhina, N.; Pekcan, A. (American Institute of Physics, 2008)
      We study differential-difference equation (d/dx) t (n+1,x) =f (t (n,x),t (n+1,x), (d/dx) t (n,x)) with unknown t (n,x) depending on continuous and discrete variables x and n. Equation of such kind is called Darboux integrable, ...
    • Preconditioning large integral-equation problems involving complex targets 

      Malas, Tahir; Gürel, Levent (IEEE, 2008-07)
      When the target problem is small in terms of the wavelength, simple preconditioners, such as BDP, may sufficiently accelerate the convergence. On the other hand, for large-scale problems, the matrix equations become much ...
    • Radar cross-section study of cylindrical cavity-backed apertures with outer or inner material coating: the case of H-polarization 

      Çolak, D.; Nosich, A. I.; Altıntaş, A. (Institute of Electrical and Electronics Engineers, 1995-05)
      A dual-series-based solution is obtained for the scattering of an H-polarized plane wave from a slitted infinite circular cylinder coated with absorbing material from inside or outside. For both cases, numerical results ...
    • Simulating a wavelength-size 2-D lens with an accurate numerical method 

      Boriskin, A. V.; Nosich, A. I.; Altıntaş, Ayhan (IEEE, 2001)
      The effect of a localized light source directivity improvement due to an arbitrarily shaped dielectric cylinder taken as a 2-D model of a dielectric lens is studied. The source is simulated by the field of a complex ...
    • Transient analysis of nonlinear circuits by combining asymptotic waveform evaluation with volterra series 

      Celik, M.; Atalar, Abdullah; Tan, M. A. (Institute of Electrical and Electronics Engineers, 1995-08)
      A new method is proposed for the transient analysis of circuits with large number of linear lumped elements and lossy coupled transmission lines, and with few mildly nonlinear terminations. The method combines the ...
    • V(Z) of the surface acoustic wave focusing system 

      Atalar, Abdullah; Köymen, Hayrettin (IEEE, 1986-11)
      It is possible to define a V(Z) function for the surface acoustic wave (SAW) focusing system for a class of reflectors similar to that defined in acoustic microscopy. In this case V(Z) is a function which relates the ...