Zobrazeno 1 - 10
of 3 048
pro vyhledávání: '"Tret’yakov, A."'
Autor:
Аleksey А. Karaban, Vladimir А. Usol’tsev, Sergey V. Tret’yakov, Sergey V. Koptev, Аndrey А. Paramonov, Il’ya V. Tsvetkov
Publikováno v:
Лесной журнал, Iss 2, Pp 65-75 (2024)
The assessment of forest productivity in forestry and forest ecology has a long tradition, but in recent decades there has been a paradigm shift: the target function of forestry, consisting in wood cultivation, has shifted towards the biosphere-stabi
Externí odkaz:
https://doaj.org/article/2e08488109b94fecb5cc9fde0ea44f79
We present recent advances in the analysis of constrained optimization problems with constraints given by singular mappings obtained within the framework of the $p$-regularity theory developed over the last twenty years. In particular, we address the
Externí odkaz:
http://arxiv.org/abs/1811.04974
The paper is devoted to the implicit function theorem involving singular mappings.We also discuss the form of the tangent cone to the solution set of the generalized equations in singular case and give some examples of applications to nonlinear progr
Externí odkaz:
http://arxiv.org/abs/1804.01566
Autor:
Medak, B.1 (AUTHOR) bmedak@uph.edu.pl, Tret'yakov, A. A.1,2,3,4 (AUTHOR) tret@uph.edu.pl
Publikováno v:
Doklady Mathematics. Aug2023, Vol. 108 Issue 1, p243-247. 5p.
Autor:
Rybal'chenko, L. F., Yanson, I. K., Fisun, V. V., Bobrov, N. L., Tret'yakov, Yu. D., Kaul', A. R., Graboi, I. E.
Publikováno v:
Fiz. Nizk. Temp., 16, 1033 (1990); Sov. J. Low Temp. Phys., 16, 602 (1990)
Electrical characteristics are measured in submicron YBaCuO-normal metal point contacts with a direct conductivity. In a microwave field, such contacts reveal a nonstationary Josephson effect which can occur in the current concentration region not on
Externí odkaz:
http://arxiv.org/abs/1702.01305
Autor:
Yanson, I. K., Rybal'chenko, L. F., Fisun, V. V., Bobrov, N. L., Kirzhner, V. M., Tret'yakov, Yu. D., Kaul', A. R., Graboi, I. E.
Publikováno v:
Fiz. Nizk. Temp.,14, 732 (1988); Sov. J. Low Temp. Phys., 14, 402 (1988)
Point-contacts formed by the high-temperature superconductor $\rm YBa_2Cu_3O_{7-\delta}$ prepared by cryochemical technique, and a noble metal Ag or Cu) are investigated. The maximum value of the energy gap $\Delta\simeq 40~meV$ and the ratio $2\Delt
Externí odkaz:
http://arxiv.org/abs/1701.08293
Autor:
Rybal'chenko, L. F., Yanson, I. K., Bobrov, N. L., Fisun, V. V., Obolenskii, M. A., Bondarenko, A. V., Tret'yakov, Yu. D., Kaul', A. R., Graboi, I. E.
Publikováno v:
Fiz. Nizk. Temp., 16, 58 (1990); Sov. J. Low Temp. Phys., 16, 30 (1990)
$YBaCuO-Ag$ pressure point contacts with direct conduction are investigated. The excess (relative to the normal state) conductivity mainly caused by fluctuational pairing of electrons above $T_c$ is measured in the temperature interval 100-200~$K$. T
Externí odkaz:
http://arxiv.org/abs/1701.06035
Autor:
Yanson, I. K., Rybal'chenko, L. F., Fisun, V. V., Bobrov, N. L., Obolenskii, M. A., Brandt, N. B., Moshchalkov, V. V., Tret'yakov, Yu. D., Kaul', A. R., Graboi, I. E.
Publikováno v:
Fiz. Nizk. Temp., 13, 557 (1987); Sov. J. Low Temp. Phys., 13, 315 (1987)
The energy gap has been measured and the characteristic phonon energies determined for the superconducting compound $La_{1.8}Sr_{02}CuO_4$ from the current-voltage characteristics of point contacts with a copper counterelectrode. The temperature depe
Externí odkaz:
http://arxiv.org/abs/1701.01982
Publikováno v:
Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, Iss 13, Pp 177-186 (2021)
In this work, we investigated optical transmission in the wavelength range of 2-14 µm of low-resistance germanium crystals (1-3 Ω·cm) doped with donor and acceptor impurities in the temperature range from 86K to 523K. The values of the attenuation
Externí odkaz:
https://doaj.org/article/1f8af70922324708a0b1a2f9ef40b6d6
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