Search Results - "Chumakov, A G"

Localization of an Unstable Solution of a System of Three Nonlinear Ordinary Differential Equations with a Small Parameter by Chumakov, G. A., Chumakova, N. A.

“…In the present paper, we study some nonlinear autonomous systems of three nonlinear ordinary differential equations (ODE) with small parameter such that two…”
Get full text

Self-sustained Oscillations in Oxidation of Propane Over Nickel: Experimental Study and Mathematical Modelling by Lashina, E. A., Kaichev, V. V., Saraev, A. A., Chumakova, N. A., Chumakov, G. A., Bukhtiyarov, V. I.

“…The regular reaction rate oscillations were observed by mass-spectrometry in the oxidation of propane over the Ni foil. CO, CO 2 , H 2 , and H 2 O were…”
Get full text

Self-Sustained Oscillations on the Back Branch of the Inverse Hysteresis in a Mathematical Model of Catalytic CO Oxidation over Palladium by Lashina, E. A., Chumakova, N. A., Chumakov, G. A.

“…Under study is the mathematical model describing the inverse temperature hysteresis as well as the self-sustained oscillations in the CO oxidation over a…”
Get full text

Self-sustained oscillations in CO oxidation reaction on PdO/Al2O3 catalyst by Lashina, E.A., Slavinskaya, E.M., Chumakova, N.A., Stonkus, O.A., Gulyaev, R.V., Stadnichenko, A.I., Chumakov, G.A., Boronin, A.I., Demidenko, G.V.

“…The paper presents the experimental study and mathematical modeling of self-sustained oscillations in the reaction of CO oxidation on PdO/Al2O3 catalysts. In…”
Get full text

Modeling of relaxation oscillations in CO oxidation on metallic catalysts with consideration of reconstructive heterogeneity of the surface by Ivanova, E.A., Chumakova, N.A., Chumakov, G.A., Boronin, A.I.

“…This paper is devoted to the development of a low-dimensional kinetic model of CO oxidation on a metallic catalyst surface and theoretical study of arising…”
Get full text

Differential Equations with a Small Parameter and Multipeak Oscillations by Chumakov, G. A., Chumakova, N. A.

“…In this paper, we study a nonlinear dynamical system of autonomous ordinary differential equations with a small parameter such that two variables and are fast…”
Get full text

Differential Equations with a Small Parameterand Multipeak Oscillations by Chumakov, G A, Chumakova, N A

“…In this paper, we study a nonlinear dynamical system of autonomous ordinary differential equations with a small parameter such that two variables and are fast…”
Get full text

Relaxation oscillations in a kinetic model of catalytic hydrogen oxidation involving a chase on canards by Chumakov, G.A., Chumakova, N.A.

“…A detailed study of two- and three-variable mathematical models of a heterogeneous catalytic system is presented with special attention to weakly stable…”
Get full text

Mathematical Aspects of Modeling the Self-Oscillations of the Heterogeneous Catalytic Reaction Rate. I by Chumakov, G. A.

Get full text

Inverse temperature hysteresis and self-sustained oscillations in CO oxidation over Pd at elevated pressures of reaction mixture: Experiment and mathematical modeling by Lashina, E.A., Slavinskaya, E.M., Chumakova, N.A., Stadnichenko, A.I., Salanov, A.N., Chumakov, G.A., Boronin, A.I.

“…[Display omitted] •Inverse hysteresis was observed in reaction of CO oxidation over palladium foil.•In the temperature range of hysteresis loop the…”
Get full text

Search for a Hypothetical 16.7 MeV Gauge Boson and Dark Photons in the NA64 Experiment at CERN by Banerjee, D, Burtsev, V. E, Chumakov, A. G, Cooke, D, Crivelli, P, Depero, E, Dermenev, A. V, Donskov, S. V, Dusaev, R. R, Enik, T, Charitonidis, N, Feshchenko, A, Frolov, V. N, Gardikiotis, A, Gerassimov, S. G, Gninenko, S. N, Hosgen, M, Jeckel, M, Karneyeu, A. E, Kekelidze, G, Ketzer, B, Kirpichnikov, D. V, Kirsanov, M. M, Konorov, I. V, Kovalenko, S. G, Kramarenko, V. A, Kravchuk, L. V, Krasnikov, N. V, Kuleshov, S. V, Lyubovitskij, V. E, Lysan, V, Matveev, V. A, Mikhailov, Yu. V, Peshekhonov, D. V, Polyakov, V. A, Radics, B, Rojas, R, Rubbia, A, Samoylenko, V. D, Tikhomirov, V. O, Tlisov, D. A, Toropin, A. N, Trifonov, A. Yu, Vasilishin, B. I, Arenas, G. Vasquez, Volkov, P. V, Volkov, V, Ulloa, P

“…Phys. Rev. Lett. 120, 231802 (2018) We report the first results on a direct search for a new 16.7 MeV boson (X) which could explain the anomalous excess of…”
Get full text

Search for vector mediator of Dark Matter production in invisible decay mode by NA64 Collaboration, Banerjee, D, Burtsev, V. E, Chumakov, A. G, Cooke, D, Crivelli, P, Depero, E, Dermenev, A. V, Donskov, S. V, Dubinin, F, Dusaev, R. R, Emmenegger, S, Fabich, A, Frolov, V. N, Gardikiotis, A, Gerassimov, S. G, Gninenko, S. N, Hosgen, M, Karneyeu, A. E, Ketzer, B, Kirpichnikov, D. V, Kirsanov, M. M, Konorov, I. V, Kovalenko, S. G, Kramarenko, V. A, Kravchuk, L. V, Krasnikov, N. V, Kuleshov, S. V, Lyubovitskij, V. E, Lysan, V, Matveev, V. A, Mikhailov, Yu. V, Peshekhonov, D. V, Polyakov, V. A, Radics, B, Rubbia, A, Samoylenko, V. D, Tikhomirov, V. O, Tlisov, D. A, Toropin, A. N, Trifonov, A. Yu, Vasilishin, B. I, Arenas, G. Vasquez, Ulloa, P

“…Phys. Rev. D 97, 072002 (2018) A search is performed for a new sub-GeV vector boson ($A'$) mediated production of Dark Matter ($\chi$) in the fixed-target…”
Get full text

On estimation of the global error of numerical solution on canard-cycles by Chumakov, G.A., Lashina, E.A., Chumakova, N.A.

“…Under study is the behavior of the global error of numerical integration in the two-variable mathematical model of a heterogeneous catalytic reaction…”
Get full text

Spin density matrix elements in exclusive $$\omega $$ ω meson muoproduction by G. D. Alexeev, M. G. Alexeev, A. Amoroso, V. Andrieux, V. Anosov, A. Antoshkin, K. Augsten, W. Augustyniak, C. D. R. Azevedo, B. Badełek, F. Balestra, M. Ball, J. Barth, R. Beck, Y. Bedfer, J. Berenguer Antequera, J. Bernhard, M. Bodlak, F. Bradamante, A. Bressan, V. E. Burtsev, W.-C. Chang, C. Chatterjee, M. Chiosso, A. G. Chumakov, S.-U. Chung, A. Cicuttin, P. M. M. Correia, M. L. Crespo, D. D’Ago, S. Dalla Torre, S. S. Dasgupta, S. Dasgupta, I. Denisenko, O. Yu. Denisov, S. V. Donskov, N. Doshita, Ch. Dreisbach, W. Dünnweber, R. R. Dusaev, A. Efremov, P. D. Eversheim, P. Faccioli, M. Faessler, A. Ferrero, M. Finger, M. Finger, H. Fischer, C. Franco, J. M. Friedrich, V. Frolov, F. Gautheron, O. P. Gavrichtchouk, S. Gerassimov, J. Giarra, I. Gnesi, M. Gorzellik, A. Grasso, A. Gridin, M. Grosse Perdekamp, B. Grube, A. Guskov, D. von Harrach, R. Heitz, F. Herrmann, N. Horikawa, N. d’Hose, C.-Y. Hsieh, S. Huber, S. Ishimoto, A. Ivanov, T. Iwata, M. Jandek, V. Jary, P. Jörg, R. Joosten, E. Kabuß, F. Kaspar, A. Kerbizi, B. Ketzer, G. V. Khaustov, Yu. A. Khokhlov, Yu. Kisselev, F. Klein, J. H. Koivuniemi, V. N. Kolosov, K. Kondo Horikawa, I. Konorov, V. F. Konstantinov, A. M. Kotzinian, O. M. Kouznetsov, A. Koval, Z. Kral, F. Krinner, Y. Kulinich, F. Kunne, K. Kurek, R. P. Kurjata, A. Kveton, K. Lavickova

“…Abstract We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $$\omega $$ ω meson muoproduction on the proton at COMPASS using…”
Get full text

A Method for the 2-D Quasi-Isometric Regular Grid Generation by Chumakov, G.A., Chumakov, S.G.

“…A method for the generation of quasi-isometric boundary-fitted curvilinear coordinate systems for arbitrary domains is developed on the basis of the theory of…”
Get full text

Chaotic dynamics in the three-variable kinetic model of CO oxidation on platinum group metals by Lashina, E.A., Chumakova, N.A., Chumakov, G.A., Boronin, A.I.

“…The paper addresses the development of a simple three-variable kinetic model of CO oxidation on metallic catalysts under isothermal conditions and the…”
Get full text

Dynamics of a system of nonlinear differential equations by Chumakov, G. A.

Get full text

Conformal parametrization of curvilinear quadrangles by means of geodesic quadrangles on surfaces of constant positive curvature by Chumakov, G. A.

Get full text

Mathematical simulation of self-oscillations in methane oxidation on nickel: An isothermal model by Lashina, E. A., Kaichev, V. V., Chumakova, N. A., Ustyugov, V. V., Chumakov, G. A., Bukhtiyarov, V. I.

“…The dynamics of methane oxidation on nickel was studied by mathematical modeling within the framework of an 18-step microkinetic scheme. The model examined…”
Get full text

ACUTE ST ELEVATION MYOCARDIAL INFARCTION: AFTERCARE AND SECONDARY PREVENTION. NATIONAL RUSSIAN GUIDELINES by Bubnova, M. G., Barbarash, O. L., Doletsky, A. A., Krasnitsky, V. B., Lebedev, E. V., Lyamina, N. P., Repin, A. N., Light, A. V., Chumakov, G. A., Aronov, D. M., Abdullaev, A. A., Arutyunov, T. P., Boytsov, S. A., Boldueva, S. A., Buziashvili, Yu. I., Galyavich, A. S., Garganeeva, A. A., Gerasimenko, M. Yu, Gulyaeva, S. F., Dovgalevsky, P. Ya, Zhuravlev, A. I., Zadionchenko, V. S., Zaitsev, V. P., Zakirova, A. N., Ivanov, G. E., Iosseliani, D. G., Kalinina, A. M., Karpov, R. S., Kosilov, N. A., Kulikov, G. A., Kuharchuk, V. V., Lyadov, K. V., Mazaev, V. P., Martynov, A. I., Misyura, O. F., Parnes, E. J., Perepech, N. B., Ruda, M. Ya, Old Believers, I. I., Smulevich, A. B., Syrkin, A. L., Tereshchenko, S. N., Fomin, I. V., Chazov, E. I., Chazova, I. E., Shlyk, S. V., Shlyakhto, E. V., Shulman, V. A.

Get full text