Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Pankov, Sergey"'
Autor:
Pankov, Sergey
Publikováno v:
Communications in Nonlinear Science and Numerical Simulation, 132 (2024), 107895
Some mechanical systems, that are modeled to have inelastic collisions, nonetheless possess energy-conserving intermittent-contact solutions, known as collisionless solutions. Such a solution, representing a persistent hopping or walking across a lev
Externí odkaz:
http://arxiv.org/abs/2402.16010
Autor:
Pankov, Sergey
Publikováno v:
Int. J. Control Autom. Syst. 21, 306-317 (2023)
Reinforcement learning methods often produce brittle policies -- policies that perform well during training, but generalize poorly beyond their direct training experience, thus becoming unstable under small disturbances. To address this issue, we pro
Externí odkaz:
http://arxiv.org/abs/2204.02471
Autor:
Pankov, Sergey
Publikováno v:
Phys. Rev. E 103, 043003 (2021)
We study a three-dimensional articulated rigid-body biped model that possesses zero cost of transport walking gaits. Energy losses are avoided due to the complete elimination of the foot-ground collisions by the concerted oscillatory motion of the mo
Externí odkaz:
http://arxiv.org/abs/2106.11765
Autor:
Pankov, Sergey
Policy gradient methods are very attractive in reinforcement learning due to their model-free nature and convergence guarantees. These methods, however, suffer from high variance in gradient estimation, resulting in poor sample efficiency. To mitigat
Externí odkaz:
http://arxiv.org/abs/1811.06225
Publikováno v:
E3S Web of Conferences, Vol 451, p 01004 (2023)
Factors and tendencies regarding demography dynamics of Tambov oblast’ within the last seventy years, based on the Russian Statistics Office, are analyzed. The considered time period may be roughly divided into three ones, including the Soviet time
Externí odkaz:
https://doaj.org/article/013f120d81914bf084eb52c9f2016c03
Autor:
Pankov, Sergey
Publikováno v:
Proc. 7th International Symposium on Visual Computing, part II, pp 168-179, 2011
The use of image transformations is essential for efficient modeling and learning of visual data. But the class of relevant transformations is large: affine transformations, projective transformations, elastic deformations, ... the list goes on. Ther
Externí odkaz:
http://arxiv.org/abs/1110.0061
Autor:
Mueller, Markus, Pankov, Sergey
Publikováno v:
Phys. Rev. B 75, 144201 (2007)
We study the low temperature phase of the 3D Coulomb glass within a mean field approach which reduces the full problem to an effective single site model with a non-trivial replica structure. We predict a finite glass transition temperature $T_c$, and
Externí odkaz:
http://arxiv.org/abs/cond-mat/0611021
Autor:
Pankov, Sergey
Publikováno v:
Phys. Rev. Lett. 96, 197204 (2006)
We propose a simple scaling ansatz for the full replica symmetry breaking solution of the Sherrington-Kirkpatrick model in the low energy sector. This solution is shown to become exact in the limit x->0, x>>T of the Parisi replica symmetry breaking s
Externí odkaz:
http://arxiv.org/abs/cond-mat/0512253
Publikováno v:
Phys. Rev. B 69, 054426 (2004)
We analyze the Hertz-Moriya-Millis theory of an antiferromagnetic quantum critical point, in the marginal case of two dimensions (d=2,z=2). Up to next-to-leading order in the number of components (N) of the field, we find that logarithmic corrections
Externí odkaz:
http://arxiv.org/abs/cond-mat/0304415
Publikováno v:
Phys. Rev. B 68, 045427 (2003)
The physics of an electron solid, held on a cryogenic liquid surface by a pressing electric field, is examined in a low-density regime that has not been explored before. We consider the effect of the pressing field in distorting the surface at the po
Externí odkaz:
http://arxiv.org/abs/cond-mat/0211648