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Koruyucu Elif Ekici Selcuk Karakoc T. Hikmet 《Journal of Thermal Analysis and Calorimetry》2021,145(3):1303-1315
Journal of Thermal Analysis and Calorimetry - This study presents determining performance parameters as well as thermodynamic analysis through certain design parameters of a two-spool turbojet... 相似文献
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Marzhan Nassurlla N. Burtebayev T. Kh. Sadykov I. Boztosun N. Amangeldi D. Alimov Zh. Kerimkulov J. Burtebayeva Maulen Nassurlla A. Kurakhmedov S.B. Sakuta Mesut Karakoc Awad A. Ibraheem K.W. Kemper Sh. Hamada 《中国物理C(英文版)》2020,44(10):104103-104103-9
The angular distributions of elastic scattering of 14N ions on 10B targets have been measured at incident beam energies of 21.0 and 24.5 MeV. Angular distributions at higher energies 38–94.0 MeV (previously measured) were also included in the analysis. All data were analyzed within the framework of the optical model and the distorted waves Born approximation method. The observed rise in cross sections at large angles was interpreted as a possible contribution of the α-cluster exchange mechanism. Spectroscopic amplitudes SA2 and SA4 for the configuration 14N→ 10B +α were extracted. Their average values are 0.58±0.10 and 0.81±0.12 for SA2 and SA4, respectively, suggesting that the exchange mechanism is a major component of the elastic scattering for this system. The energy dependence of the depths for the real and imaginary potentials was found. 相似文献
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S. Battal Gazi Karakoc Michael Neilan 《Numerical Methods for Partial Differential Equations》2014,30(4):1254-1278
A symmetric C 0 finite element method for the biharmonic problem is constructed and analyzed. In our approach, we introduce one‐sided discrete second‐order derivatives and Hessian matrices to formulate our scheme. We show that the method is stable and converge with optimal order in a variety of norms. A distinctive feature of the method is that the results hold without extrinsic penalization of the gradient across interelement boundaries. Numerical experiments are given that support the theoretical results, and the extension to Kirchhoff plates is also discussed. © 2014 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 30: 1254–1278, 2014 相似文献
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Samir Kumar Bhowmik Seydi B. G. Karakoc 《Numerical Methods for Partial Differential Equations》2019,35(6):2236-2257
The generalized regularized long wave (GRLW) equation has been developed to model a variety of physical phenomena such as ion‐acoustic and magnetohydrodynamic waves in plasma, nonlinear transverse waves in shallow water and phonon packets in nonlinear crystals. This paper aims to develop and analyze a powerful numerical scheme for the nonlinear GRLW equation by Petrov–Galerkin method in which the element shape functions are cubic and weight functions are quadratic B‐splines. The proposed method is implemented to three reference problems involving propagation of the single solitary wave, interaction of two solitary waves and evolution of solitons with the Maxwellian initial condition. The variational formulation and semi‐discrete Galerkin scheme of the equation are firstly constituted. We estimate rate of convergence of such an approximation. Using Fourier stability analysis of the linearized scheme we show that the scheme is unconditionally stable. To verify practicality and robustness of the new scheme error norms L2, L∞ and three invariants I1, I2, and I3 are calculated. The computed numerical results are compared with other published results and confirmed to be precise and effective. 相似文献
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We study the existence of oscillatory and periodic solutions of a class of first order scalar impulsive delay differential
equations with piecewise constant argument. 相似文献
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An Improvement of the Asymptotic Iteration Method for Exactly Solvable Eigenvalue Problems
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I. Boztosun M. Karakoc 《中国物理快报》2007,24(11):3028-3031
We derive a formula that simplifies the original asymptotic iteration method formulation to find the energy eigenvalues for the analytically solvable cases. We then show that there is a connection between the asymptotic iteration and the Nikiforo-Uvarov methods, which both solve the second order linear ordinary differential equations analytically. 相似文献
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This paper is devoted to a class of linear impulsive partial difference equations with continuous variables. We establish a difference inequality without impulses, and use it to obtain various sufficient conditions for the oscillation of solutions. 相似文献
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The 16O + 28Si reaction has been widely studied both experimentally and theoretically and has been claimed to show indications of chaotic
scattering. In order to examine this claim and to address whether reaction models such as the optical one could explain the
experimental data, we have analyzed the 16O + 28Si system within the framework of the optical model for ten energies from 29.0 to 45.0 MeV, by using microscopic folded potentials,
which are based on M3Y nucleon-nucleon, alpha-alpha effective interactions and a phenomenological shallow potential. All potentials describe the
individual angular distributions very well at forward angles. However, they fail to describe the individual angular distributions
over the whole angular range up to 180°. Nevertheless, we have been able to explain the experimental data by modifying the
surface region of the microscopic real potentials by adding two surface potentials. With these correction potentials, we have
obtained very good agreement for the individual angular distributions over the whole angular range for the given energies
as well as for the experimental data near the Coulomb barrier. The failure of these optical potentials in explaining the scattering
observables of this reaction without corrections puts a question mark on the model and supports the idea of a chaotic behavior.
The text was submitted by the authors in English. 相似文献
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