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排序方式: 共有216条查询结果,搜索用时 31 毫秒
1.
V. I. Zubkov O. V. Kucherova I. N. Yakovlev A. V. Solomonov 《Russian Microelectronics》2015,44(3):203-209
An automated system for integrated electrophysical and optical studies of semiconductor nanoheterostructures, which operates in a wide temperature range from 15 to 475 K, is designed. The setup is intended to measure the temperature and frequency admittance and electroluminescence spectra of light-emitting diode and laser chips formed on substrates of diameter up to 50.2 mm, and the distribution of parameters over the wafer. The setup includes the closed-cycle helium cryogenic station, LCR meter, and temperature controller. The characterization results of nanoheterostructures with InGaN/GaN multiple quantum wells, which are used for creating highly efficient white and blue light-emitting diodes, are presented. 相似文献
2.
Yu. A. Brodskii V. I. Bazikov I. V. Zubkov A. I. Krylov V. D. Stepanenko 《Chemical and Petroleum Engineering》2006,42(9-10):552-559
Modern designs are examined, and technical data presented for vibratory electric and convection driers, driers with infra-red sources, and steam driers. 相似文献
3.
EL Nazarenko RP Gorshkova VA Zubkov AS Shashkov EP Ivanova IuS Ovodov 《Canadian Metallurgical Quarterly》1993,19(7):733-739
An acidic polysaccharide from Alteromonas sp. 4MC17 is built up of trisaccharide repeating units containing D-glucose, D-mannose and D-galacturonic acid residues. On the basis of methylation studies, 1H and 13C NMR-spectroscopy data, including two-dimensional homonuclear correlation spectroscopy and nuclear Overhauser effects, the following structure was suggested for the polysaccharide repeating unit: -->4)-beta-D-Glcp-(1-->4)-beta-D-GalpA-(1-->4)-beta-D-Manp-( 1-->. 相似文献
4.
G. F. Egorov D. I. Danilin E. V. Zakharova E. N. Darskaya A. A. Zubkov 《Atomic Energy》2002,93(1):595-600
The kinetics of radiation, thermal, and radiation–thermal decomposition of a mixture of nitric and acetic acids in water solutions of sodium nitrate is investigated under homogeneous conditions and with a solid phase introduced in the form of sandstone. The experimental data are used to calculate the temperature dependences of the rate of radiation, thermal, and radiation–thermal decomposition of the acids. The results obtained make it possible to calculate the dynamics of decomposition of acids for the conditions of deep burial of liquid radioactive wastes. 相似文献
5.
Ravan A. Rahimov Gulnara A. Ahmadova Seyid-Zeynab F. Hashimzade Elmar Imanov Hajibala G. Khasiyev Nazani K. Karimova Fedor I. Zubkov 《Journal of surfactants and detergents》2021,24(3):433-444
Two new classes of gemini cationic surfactants—hexanediyl-1,6-bis[(isopropylol) alkylammonium] dibromide {in the abbreviation form: CnC6Cn[iPr-OH] and CnC6Cn[iPr-OH]2; alkyl: CnH2n + 1 with n = 9, 10, 12 and 14}—have been synthesized by interaction of alkyl bromides with N,N′-di-(isopropylol)-1,6-diaminohexane and N,N,N′,N′-tetra-(isopropylol)-1,6-diaminohexane. The surface tension, electrical conductivity, and dynamic light scattering (DLS) techniques were used to investigate the aggregation properties of the gemini cationic surfactants in aqueous solution. The formation of critical aggregates at two concentrations in an aqueous solution from obtained gemini cationic surfactants were determined via the tensiometric method. Thus, these gemini cationic surfactants start to form aggregates at concentrations well below their critical micelle concentrations (CMC). The surface properties and the binding degree (β) of the opposite ion were tested against the length of the surfactant hydrocarbon chain and the number of the isopropylol groups in the head group. By applying the DLS technique, it was explored that how the number of isopropylol groups in gemini cationic surfactants with C12H25 chain affects the sizes of micelles at concentrations greater than CMC. It was discovered that the obtained gemini cationic surfactants have a biocidal character. 相似文献
6.
7.
G. Z. Garber A. A. Dorofeev A. M. Zubkov Yu. V. Kolkovskii Yu. A. Kontsevoi K. N. Zyablyuk A. Yu. Mityagin N. Kh. Talipov G. V. Chucheva 《Journal of Communications Technology and Electronics》2014,59(4):379-383
Numerical experiments are used to plan the development of diamond-based microwave FETs with an output power of 2.5 W per 1 mm of the gate width at a frequency of 15 GHz. A family of the I–V characteristics of the Schottky-barrier FET with gate length L G = 50 nm and width W = 1 mm is calculated. Bases on analogy with a TGF2023-20 GaN HEMT, the topology of the high-power diamond transistor (parallel cells with gate widths W = 1.2 mm and 24 elementary gates per cell) is constructed. 相似文献
8.
A method is developed for the comparison of deformational cutting and traditional cutting in terms of the force and energy consumption. The force required is less in deformational cutting than in traditional cutting. 相似文献
9.
The operation of diesel engines with nonsteady loads is considered. Numerical experiments are based on a model, a neural network, and test-bench data. 相似文献
10.
The use of a metal plate to simulate pin shaping by deformational cutting is proposed. The influence of the tool geometry on the volume of material removed to form a single pin is considered. Analytical formulas for the cutting angle and the pin length are derived. Experimental data regarding the influence of the cutting parameters on the shape and alignment of the pins are presented 相似文献