Orel State Technical University

Orel, Russia
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Meshkov A.G.,Orel State Technical University | Sokolov V.V.,Russian Academy of Sciences
Theoretical and Mathematical Physics | Year: 2011

We present a complete list of nonlinear one-field hyperbolic equations with integrable third-order x and y symmetries. The list includes both equations of the sine-Gordon type and equations linearizable by differential substitutions. © 2011 MAIK/Nauka.

Korneev A.Y.,Orel State Technical University | Yaroslavtsev M.M.,Orel State Technical University
Russian Engineering Research | Year: 2010

Formulas are proposed for the dynamic characteristics of conical multipad hydrodynamic liquid-friction bearings with variable properties and a two-phase state of the lubricant: specifically, formulas for the rigidity and damping coefficients of the lubricant layer. © 2010 Allerton Press, Inc.

Frolenkov K.Yu.,Orel State Technical University | Frolenkova L.Yu.,Orel State Technical University | Shadrin I.F.,Orel State Technical University
Protection of Metals and Physical Chemistry of Surfaces | Year: 2010

Some peculiarities of the time and temperature dependences of the high-temperature oxidation of a low-alloyed low-carbon steel covered with a glass coating are studied. The dependences characterizing the oxidation of steel without coating and that covered with it are found to have a similar character. Based on the data obtained, it is supposed that, at low temperatures, the prevailing mechanism involves the penetration of oxygen toward the metal surface through macro-and micropores of the coating, while, at high temperatures, the oxidation, which seems to be related to the electrochemical corrosion of the surface under a glass melt, becomes predominant. © Pleiades Publishing, Ltd., 2010.

Zebrev G.I.,National Research Nuclear University MEPhI | Tselykovskiy A.A.,National Research Nuclear University MEPhI | Turin V.O.,Orel State Technical University
2012 28th International Conference on Microelectronics - Proceedings, MIEL 2012 | Year: 2012

An analytic compact model of large-area double-gate graphene field-effect transistor is presented. As parts of the model, the electrostatics of double-gate structure is described and a unified phenomenological approach for modeling of the two drain current saturation modes is proposed. © 2012 IEEE.

Korneev A.Y.,Orel State Technical University
Russian Engineering Research | Year: 2012

Formulas for the static characteristics of conical hydrodynamic bearings of three types are considered, with variable thermophysical properties of the lubricant. © 2012 Allerton Press, Inc.

Koziol Z.,Orel State Technical University | Matyukhin S.I.,Orel State Technical University
Romanian Reports of Physics | Year: 2012

Computer simulations with Synopsys' Sentaurus TCAD are used to study the effect of the molar concentration of aluminum in the active and waveguide regions on the energy spectrum of carriers in Quantum Well (QW) and the optical spectral characteristics of radiation of semiconductor lasers with AlxGa1-xAs double heterostructures and separate confinement (SCH). Wavelength of single-mode lasers is shown to be almost independent of the concentration of aluminum in the waveguide itself, in a wide range of aluminum content, but to depend mainly on Al concentrations in QW region.

Kharlamov V.F.,Orel State Technical University
Journal of Experimental and Theoretical Physics | Year: 2013

It is found that the dimensionless thermoelectric figure of merit of a material consisting of a large number of ball-shaped semiconductor or metal particles can be much more than unity. The introduction of an insulator into the space between the particles is shown to sharply increase the power of the converter of heat energy into electric current energy. © 2013 Pleiades Publishing, Ltd.

Balakhnev M.J.,Orel State Technical University
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2011

We construct auto-Bäcklund transformations and nonlinear superposition formulas for the third order higher symmetry of Broer-Kaup system, the Jordan-KdV system, vector generalizations of the Drinfel'd-Sokolov-Wilson, the Hirota-Satsuma and the Drinfel'd-Sokolov-Ito integrable systems. Soliton solutions are derived from these results. © 2010 Elsevier B.V. All rights reserved.

Shorkin V.S.,Orel State Technical University
Mechanics of Solids | Year: 2011

The dispersion law ceases to be linear already at ultrasonic frequencies of elastic vibrations of particles as mechanical perturbation waves propagate through the medium. A variant of the continuum model of an elastic medium is proposed which is based on the assumption of pair and triplet potential interaction between infinitely small particles; this allows one to represent the dispersion law with any required accuracy. The corresponding wave equation, which is still linear, can have an arbitrarily large order of partial derivatives with respect to the coordinates. It is suggested that the results of comparing the representations of the dispersion law from the elasticity and solid-state physics viewpoints should be used to determine nonclassical characteristics of the elastic state of the medium. The theoretical conclusions are illustrated with calculations performed for plane waves propagating through aluminum. © 2011 Allerton Press, Inc.

Kharlamov V.F.,Orel State Technical University
Technical Physics | Year: 2010

It is found that, if the energy being released due to the formation of product molecules in the course of a heterogeneous reaction is lower than the electron work function, the current density of electron chemiemission from the surface of any semiconductor exponentially depends on electric field strength E,j = Cexp(βE), where C and β are coefficients. Theoretical results qualitatively agree with experimental data obtained for the heterogeneous recombination of hydrogen atoms on the silicon surface in weak electric fields (0 < E < 5 x 106V/m). © 2010 Pleiades Publishing, Ltd.

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