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排序方式: 共有200条查询结果,搜索用时 15 毫秒
1.
Stepanova L. N. Kuten M. M. Bobrov A. L. 《Russian Journal of Nondestructive Testing》2021,57(9):753-761
Russian Journal of Nondestructive Testing - The results of amplitude analysis of discrete acoustic emission signals from developing sources such as fatigue cracks are presented. The studies were... 相似文献
2.
Khoroshavin L. B. Golovina T. M. Bobrov E. V. Vol'kinshtein M. Ya. 《Refractories and Industrial Ceramics》2002,43(5-6):206-208
Results of a study of chromite dunites with different concentrations of chromite — from 10 to 20% Cr2O3 — are reported. Thermomechanical properties of control specimens are determined. Chromite dunites require precalcination for their use in the manufacture of forsterite-chromite components for thermal power units of ferrous and, especially, nonferrous metallurgy. 相似文献
3.
V. B. Bobrov 《High Temperature》2016,54(3):447-450
The free energy of simple liquid metal in the approximation of the integral smallness of the electron–ion interaction has been found on the basis of the model of single-component plasma as the initial system. The result obtained holds at the equivalency of correlation functions determined within Gibbs canonical and large canonical distributions. 相似文献
4.
V. B. Bobrov 《High Temperature》2017,55(2):174-182
The free energy of a Coulomb system of interacting electrons and nuclei is studied in the adiabatic approximation for nuclei with allowance for particle identity effects. An explicit expression is found for the effective short-range interaction potential of “identical” initial atoms in the self-consistent Hartree–Fock approximation for the electron subsystem and the first-order perturbation theory in a small parameter defined via the ratio of the atomic size to the mean distance between initial atoms. 相似文献
5.
A. V. Bobrov B. S. Sarbaev Yu. Yu. Shirshov 《Journal of Machinery Manufacture and Reliability》2016,45(2):145-151
Data of an experimental–theoretical investigation of the deformation and strength characteristics of a carbon–carbide composite with a 2D reinforcement scheme are given. The nonlinear deformation of the material is described using the relationships of nonlinear elasticity of an orthotropic solid. The strength characteristics are calculated by the maximum stress criterion. Calculated deformation diagrams and ultimate strengths are compared with the experimental data of the authors. 相似文献
6.
V. P. Bobrov V. G. Goldshtein V. S. Polyakov O. V. Solyakov 《Russian Electrical Engineering》2009,80(11):630-635
Problems in analyzing the statistical modeling of electromagnetic compatibility (EC) in processes linked with a rise in overvoltage
and its development and influence in electric mains are analyzed. Regularities in electric equipment damage and recommendations
for electromagnetic compatibility analysis with the Monte Carlo method are presented. 相似文献
7.
Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy
Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 114–118, January–February, 1989. 相似文献
8.
M. V. Kurlenya V. N. Oparin G. F. Bobrov A. A. Akinin V. I. Vostrikov V. F. Yushkin 《Journal of Mining Science》1995,31(4):237-244
Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 3–11, July–August, 1995. 相似文献
9.
S. A. Blokhin L. Ya. Karachinsky I. I. Novikov A. S. Payusov A. M. Nadtochiy M. A. Bobrov A. G. Kuzmenkov N. A. Maleev N. N. Ledentsov V. M. Ustinov D. Bimberg 《Semiconductors》2014,48(1):77-82
Highly efficient fast vertical-cavity surface-emitting lasers (VCSELs) for the 850-nm spectral range, promising for the development of optical interconnections with a data transmission rate of 25 Gbit/s per channel, are fabricated and studied. Lasers with a selectively oxidized current aperture 6 μm in diameter demonstrate multimode lasing with a quantum efficiency of 35–45% and a threshold current of 0.5–0.7 mA in the temperature range 20–85°C. According to the results of small-signal frequency analysis, the maximum modulation frequency of the lasers exceeds 17 GHz, with the rate of its increase with current exceeding 9 GHz/mA1/2, which provides VCSEL operation at a rate of 25 Gbit/s in the entire working temperature range. Endurance tests for 3000 h did not reveal any sudden degradation of the lasers. The optical power at working point and the threshold current changed relative to that at the beginning of the tests by no more than 5 and 10%, respectively. 相似文献
10.
The crystalline structure and composition of a GaMnSb film is studied. The film is produced on a GaAs (100) substrate by deposition from laser plasma in a hydrogen flux at a temperature of 400°C. The formation of GaMn inclusions in the GaSb:Mn matrix is detected. The stoichiometry ratio of the inclusions corresponds to that of the Ga162.5Mn101.5 compound. 相似文献