Search Results - "Ovsyannikov, D.A."

Estimates of the error of interval quadrature formulas on some classes of differentiable functions by Motornyi, V.P., Ovsyannikov, D.A.

“…The exact value of error of interval quadrature formulas$$\int_0^{2\pi}f(t)dt -\frac{\pi}{nh}\sum_{k=0}^{n-1}\int_{-h}^hf(t+\frac {2k\pi}{n})dt =…”
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Increase in interplanar distances and formation of amorphous shear bands in deformed diamond by Kulnitskiy, B.A., Gordeeva, T.A., Ovsyannikov, D.A., Popov, M.Yu, Blank, V.D.

“…Amorphous transformation-deformation bands have been observed in diamond under cyclic loading (at planetary ball milling) near the graphite-diamond equilibrium…”
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On Some Problems of Trajectory Beam Program Control. Part II by Ovsyannikov, D. A., Kotina, E. D.

“…The paper considers the problems of macroparameter control in a linear dynamic system. In the authors’ previous paper, such problems in controlling nonlinear…”
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Effect of elastic deformations on direct polymorphic transformations in BN under pressure by Perezhogin, I.A., Kulnitskiy, B.A., Zholudev, S.I., Ovsyannikov, D.A., Popov, M.Yu, Blank, V.D.

“…This paper gives an investigation of the effect of shear deformation on direct transitions in BN under pressure. The transition of a hexagonal (graphite-like)…”
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Diamond-based HBAR as a high-pressure sensor by Sorokin, B.P., Asafiev, N.O., Ovsyannikov, D.A., Popov, M.Yu, Yashin, D.V., Luparev, N.V., Blank, V.D.

“…•Diamond-based High-overtone Bulk Acoustic Resonator (HBAR) as a high-pressure sensor up to 30 GPa.•Raman and ruby scale control methods.•Integrated…”
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On Some Problems of Trajectory Beam Program Control. Part I by Ovsyannikov, D. A., Kotina, E. D.

“…This paper deals with problems of program control of a trajectory beam. We investigate formulations that arise when considering problems of charged particle…”
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Effect of ITER CS and PF magnets on EM loads outside vacuum vessel at plasma disruption events by Arslanova, D.N., Belov, A.V., Gapionok, E.I., Kukhtin, V.P., Lamzin, E.A., Makarov, A.A., Ovsyannikov, D.A., Ovsyannikov, D.A., Sytchevsky, S.E.

“…•Duration of DINA-plasma disruption scenarios is limited by the end of plasma CQ.•Using of constant CS and PF coil currents after CQ end may give incorrect…”
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High-hardness ceramics based on boron carbide fullerite derivatives by Ovsyannikov, D. A., Popov, M. Yu, Perfilov, S. A., Prokhorov, V. M., Kulnitskiy, B. A., Perezhogin, I. A., Blank, V. D.

“…A new type of ceramics based on the phases of fullerite derivatives and boron carbide B 4 C is obtained. The material is synthesized at a temperature of 1500 K…”
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Structure of boron carbide after applying shear deformations under a pressure to 55 GPa by Annenkov, M. R., Kulnitskiy, B. A., Perezhogin, I. A., Ovsyannikov, D. A., Popov, M. Yu, Blank, V. D.

“…Transmission electron microscopy has been used to study the structural features of boron carbide treated in a high-pressure shear chamber with diamond anvils…”
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Modeling of magnetic field perturbations in electrophysical devices due to the steel reinforcement of buildings by Amoskov, V. M., Bazarov, A. M., Belyakov, V. A., Gapionok, E. I., Kaparkova, M. V., Kukhtin, V. P., Lamzin, E. A., Lyublin, B. V., Ovsyannikov, D. A., Sytchevsky, S. E.

“…We have proposed an effective method for modeling the steel reinforcement in the buildings for electrophysical devices to take into account the magnetic field…”
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Transport properties of nanocomposite thermoelectric materials based on Si and Ge by Ovsyannikov, D. A., Popov, M. Yu, Buga, S. G., Kirichenko, A. N., Tarelkin, S. A., Aksenenkov, V. V., Tat’yanin, E. V., Blank, V. D.

“…The modification of transport properties (thermal conductivity, electrical conductivity, and See-beck coefficient) of nanostructured thermoelectrics based on…”
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Beam dynamics optimization: Models, methods and applications by Ovsyannikov, D.A., Ovsyannikov, A.D., Vorogushin, M.F., Svistunov, Yu.A., Durkin, A.P.

“…A special class of problems attracting attention of numerous researchers is represented by the tasks associated with the beam dynamics optimization in…”
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Simulation of Spring Aggregation of Bees in Hives with Large Daily Fluctuations in Outdoor Temperature by Oskin, S. V., Ovsyannikov, D. A.

“…Many studies have been devoted to the passage of bees during the winter period, which indicate that this state of the bee family is yet to be understood…”
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Modeling of self-consistent distributions for longitudinally non-uniform beams by Drivotin, O.I., Ovsyannikov, D.A.

“…Self-consistent distributions for beams in longitudinal magnetic and electric fields are considered. The magnetic and electric fields are assumed to be uniform…”
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Particle distributions for beam in electric field by Drivotin, O.I., Ovsyannikov, D.A.

“…In the present report an approach for determination of particle distribution density in analytical form for beam in electric field is presented. It was applied…”
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New classes of uniform distributions for charged particles in longitudinal magnetic field by Drivotin, O.I., Ovsyannikov, D.A.

“…The problem of stationary self-consistent distributions for charged particles beam in a longitudinal magnetic field was considered in various works. The…”
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BDO-RFQ code and optimization models by Ovsyannikov, D.A., Ovsyannikov, A.D., Antropov, I.V., Kozynchenko, V.A.

“…The software complex for step-by-step beam dynamics optimization of charged particles in RFQ structure is developed using MATLAB. The RFQ accelerating…”
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Mathematical control model for beam dynamics optimization by Ovsyannikov, D.A., Ovsyannikov, A.D.

“…A special class of the problems attracting attention of numerous researches is represented by the problems associated with the beam dynamics optimization in…”
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Exploring the bunching section of the Neutrino Factory by Poklonskiy, A.A., Ovsyannikov, D.A., Ovsyannikov, A.D., Neuffer, D., Berz, M.

“…There exists now a large demand in better neutrino beams in particle physics community. Studying of such beams could reveal interesting and important…”
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Program for scientific and educational investigations on the base of small spherical tokamak Gutta by Ovsyannikov, D.A., Ovsyannikov, A.D., Zhabko, A.P., Veremey, E.I., Vorobyov, G.M., Zavadskij, V.M.

“…In Saint-Petersburg state University the modernization of spherical Gutta tokamak is carried out. The aim of the program is to build the research device to…”
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