Zobrazeno 1 - 10
of 882
pro vyhledávání: '"Gama, S."'
Autor:
Carvalho, A. M. G., Alves, C. S., Trevizoli, P. V., Santos, A. O. dos, Gama, S., Coelho, A. A.
Publikováno v:
Applied Physics A (2018) 124:269
The Gd5.09Ge2.03Si1.88 compound, as well as other magnetocaloric materials, certainly will not be used in their un-manufactured as-cast condition in future magnetic refrigeration applications or other devices. In this work, we have studied the Gd5.09
Externí odkaz:
http://arxiv.org/abs/1712.05820
A new approach to the Pontryagin maximum principle for nonlinear fractional optimal control problems
In this paper, we discuss a new general formulation of fractional optimal control problems whose performance index is in the fractional integral form and the dynamics are given by a set of fractional differential equations in the Caputo sense. We use
Externí odkaz:
http://arxiv.org/abs/1503.07720
Structural, magnetic and magnetocaloric properties of Mn2-xCrxSb compounds have been studied. In these compounds a first order magnetic phase transition from the ferrimagnetic to the antiferromagnetic state occurs with decreasing temperature, giving
Externí odkaz:
http://arxiv.org/abs/1307.3194
Publikováno v:
In Journal of Alloys and Compounds 30 November 2019 811
Publikováno v:
In Materials Chemistry and Physics 1 June 2019 231:281-285
Publikováno v:
JOURNAL OF APPLIED PHYSICS 106, 053901 (2009)
The effect of pressure on the magnetic and the magnetocaloric properties around the martensitic transformation temperature in NiCoMnSb Heusler alloy has been studied. The martensitic transition temperature has significantly shifted to higher temperat
Externí odkaz:
http://arxiv.org/abs/1006.0067
Publikováno v:
J. Phys.: Condens. Matter 21, 496003 (2009)
Effects of Al, Mn and Sb dopings in CeFe2 and effect of applied pressure have been investigated. Al doping gives rise to the FM-AFM transition and a reduction in the magnetic moment and TC values, clearly indicating the growth of the AFM component. M
Externí odkaz:
http://arxiv.org/abs/1005.3669
Publikováno v:
Physica D, 239 (2010) 1188-1209
Dependence of magnetic field generation on the rotation rate is explored by direct numerical simulation of magnetohydrodynamic convective attractors in a plane layer of conducting fluid with square periodicity cells for the Taylor number varied from
Externí odkaz:
http://arxiv.org/abs/0908.1891
Autor:
Gama, S. M. A., Smirnov, G.
Publikováno v:
Electron. J. Diff. Eqns., Vol. 2009(2009), No. 08, pp. 1-9.
We prove an existence and uniqueness of solution for the Cauchy problem of the simplest nonlinear short-wave equation, $u_{tx}=u-3u^{2}$, with periodic boundary condition.
Externí odkaz:
http://arxiv.org/abs/0811.2504
By virtue of the itinerant electron metamagnetism (IEM), the RCo2 compounds with R=Er, Ho and Dy are found to show first order magnetic transition at their ordering temperatures. The inherent instability of Co sublattice magnetism is responsible for
Externí odkaz:
http://arxiv.org/abs/cond-mat/0609401