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11.
The problem of efficient computation of maximum matchings in the n-dimensional cube, which is applied in coding theory, is solved. For an odd n, such a matching can be found by the method given in our Theorem 2. This method is based on the explicit construction (Theorem 1) of the maps of the vertex set that induce largest matchings in any bipartite subgraph of the n-dimensional cube for any n. 相似文献
12.
Andreev S. N. Belyaev V. S. Matafonov A. P. Tarakanov V. P. Zagreev B. V. Krainov V. P. Mukhanov S. A. Lobanov A. V. 《Journal of Experimental and Theoretical Physics》2022,135(1):26-34
Journal of Experimental and Theoretical Physics - The yields of alpha particles and neutrons from the promising 11B(p, 3α) fusion reaction and the reference 11B(p, n)11C nuclear reaction,... 相似文献
13.
I. P. Pronin E. Yu. Kaptelov E. A. Tarakanov T. A. Shaplygina V. P. Afanas’ev A. V. Pankrashkin 《Physics of the Solid State》2002,44(4):769-773
This paper reports on a study of the electrical properties of 0.7–1-μm-thick textured PZT ferroelectric films prepared by
rf magnetron sputtering of a PbZr0.54Ti0.46O3 target which additionally contained 10 mol % lead oxide. Such films are shown to feature a combination of a self-polarized
state and migratory polarization. The totality of the data obtained suggest that the films had n-type conduction. As shown by the laser beam modulation technique, the polarization was distributed nonuniformly in depth,
with most of the poled state localized near the lower interface of the thin-film ferroelectric capacitor. The mechanism underlying
the onset of this self-polarization is related to the charging of the lower interface of the structure by electrons, which
occurs during the cooling following the high-temperature treatment of the PZT film, and to poling of the bulk of the film
by the charged interface. This mechanism of the self-polarization of ferroelectric films is believed to have a universal character.
__________
Translated from Fizika Tverdogo Tela, Vol. 44, No. 4, 2002, pp. 739–744.
Original Russian Text Copyright ? 2002 by Pronin, Kaptelov, Tarakanov, Shaplygina, Afanas’ev, Pankrashkin. 相似文献
14.
E. A. Kralkina P. A. Nekliudova V. B. Pavlov K. V. Vavilin V. P. Tarakanov 《Moscow University Physics Bulletin》2014,69(1):86-91
This work is devoted to systematic investigation into the radial dependence of the plasma parameters of a low-pressure inductive radio-frequency (RF) discharge on pressure within a wide range of 0.8–1 Torr. Experimental results that were obtained under the considered pressures make it possible to analyze the patterns of the changes in plasma parameters upon both a nonlocal mode of discharge and a transition from a nonlocal to local mode of the RF power input. Discharges in helium, neon, argon, and krypton were considered. Experimental data were compared to the results of the numerical simulation of the inductive RF discharge using the particle-in-cell (PIC) method. 相似文献
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V. M. Fedorov E. F. Lebedev V. E. Ostashev V. P. Tarakanov A. V. Ul’yanov V. E. Fortov B. D. Yankovskii 《Technical Physics》2000,45(6):753-758
Experimental and analytic studies of the generation and propagation of electromagnetic radiation due to repetitive current pulses of a nanosecond duration (peak power to 1 MW, current slew rate of 3.5 A/ns) are presented. The radiation source was a fine-wire ring antenna of large radius (ρa=1.4 m). The antenna was driven along its full length instantaneously within the time τ shorter than the time of wave travel along the ring diameter (τ≤2ρa/c). Parameters of the emitted wave were measured. The experimental data are consistent with the calculated emitted-wave parameters that take into account radiation reflection from the conducting walls of the laboratory. The efficiency of transformation of drive pulse energy into ultra-wideband radiation was found to be approximately 15%. A ring antenna driven by repetitive current pulses (within the time τ≤2ρa/c) is suggested to be used as a reference ultra-wideband emitter. 相似文献
17.
We performed a particle-in-cell (PIC) simulation of a vircator with counter electron beams in a cylindrical cavity with metal walls. Two pairs of counter-propagating superlimiting electron beams with different energy and current in each pair are injected along the cylinder axis. It is found that the electron charge in the cavity is formed as a sequence of pulses corresponding to slow accumulation and fast discharge. It is shown that the pulses are related to the characteristic dynamics of the squeezed beam state, the distributed virtual cathode. This regime can be used to generate anHF sequence of ultrawideband electromagnetic pulses. 相似文献
18.
A calculation of the compression diagrams of flexible plastic foams during their long-time testing under a load is given on the basis of the proposed cell model, on the assumption that permanent set is related to buckling of the strands. The character of change of the nominal compressive strength and corresponding deformation as a function of the magnitude of permanent set is established. A marked change of the second section of the compression diagram (plateau), even to its degeneration, in the presence of considerable permanent set was found. A comparison of the experimental and calculated data showed their satisfactory correspondence.Vladimir Research Institute of Synthetic Resins. Translated from Mekhanika Polimerov, Vol. 9, No. 3, pp. 443–449, May–June, 1973. 相似文献
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