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排序方式: 共有278条查询结果,搜索用时 350 毫秒
1.
D. A. Kudryashov A. S. Gudovskikh A. M. Mozharov A. D. Bol’shakov I. S. Mukhin Zh. I. Alferov 《Technical Physics Letters》2015,41(12):1120-1123
Design and operation modes of double-junction monolithic lattice-matched solar cells based on the ZnSiP2/Si system of materials have been calculated. The effect of the photoactive region thickness and minority carrier lifetime in ZnSiP2 layers on the efficiency of conversion of the incident solar light energy into electrical power was determined. It is shown that solar cells based on ZnSiP2/Si heterostructures can provide efficiencies of 28.8% at AM1.5D, 100 mW/cm2, and 33.3% at AM1.5D, 200 W/cm2. 相似文献
2.
A. E. Kudryashov Zh. V. Eremeeva E. A. Levashov V. Yu. Lopatin A. V. Sevost’yanova E. I. Zamulaeva 《Surface Engineering and Applied Electrochemistry》2018,54(5):437-445
Electrospark treatment of OT4-1 titanium alloy was performed sequentially with a STIM-20N hard-alloy electrode (TiC–20% Ni) and carbon-containing material (graphite and carbon-based composite materials). Kinetics of the mass transfer of the hard-alloy electrode was studied. The cathode mass loss during the first minute of the treatment was established. The kinetics results were processed using the methods of mathematical statistics. The erosion resistance of the applied carbon-containing materials was determined. Phase composition and relief of the coatings formed were analyzed. It was found that the application of the carbon-containing material increases the content of refractory phases in the coatings. Increase in the time of the treatment using the carbon-containing materials decreases the roughness of the coatings. 相似文献
3.
Dvoryankin V. F. Dikaev Yu. M. Kudryashov A. A. Sokolovskii A. A. 《Measurement Techniques》2003,46(8):806-809
A method is described for determining the instantaneous effective energy of x-ray tube brehmsstrahlung by means of two semiconductor detectors employing epitaxial GaAs structures and a measurement circuit, which together determine the effective energy with an error of 5% in the range 20–80 keV in the presence of nonlinearity in the detector response. 相似文献
4.
Experimental study on a planar capacitative displacement sensor 总被引:1,自引:0,他引:1
An experimental study is described on a planar capacitative displacement sensor. It differs from existing models in being simple and giving scope for using film techniques. The sensor is particularly effective in measuring large displacements, e.g., in physics equipment.Translated from Izmeritel'naya Tekhnika, No. 3, pp. 36–37, March, 1995. 相似文献
5.
V. P. Evtikhiev I. V. Kudryashov E. Yu. Kotel’nikov V. E. Tokranov A. N. Titkov I. S. Tarasov Zh. I. Alferov 《Semiconductors》1998,32(12):1323-1327
The electroluminescence and stimulated emission of lasers with one layer of InAs quantum dots (QD’s) grown in a single molecular-beam
epitaxial process on vicinal GaAs(001) surfaces misoriented in the direction [010] by 2, 4 and 6° are investigated. It is
discovered that an increase in the misorientation angle leads to a blue shift and a decrease in the full width at half maximum
(FWHM) of the electroluminescence spectrum. This effect is attributed to a decrease in the size of the quantum dots and improvement
in their size uniformity. A strong dependence of the threshold current density on the width of the spontaneous luminescence
spectrum is discovered. The room-temperature threshold current density of the lasers with one layer of quantum dots and the
spontaneous luminescence spectrum having the smallest FWHM (54 meV) equals 210 A/cm2.
Fiz. Tekh. Poluprovodn. 32, 1482–1486 (December 1998) 相似文献
6.
M. Kh. Rabinovich V. G. Kudryashov M. V. Markushev 《Metal Science and Heat Treatment》1988,30(8):609-612
1. | The characteristics of strength (u, o 2), plasticity (, ) in the longitudinal and transverse directions, impact toughness in the transverse direction, and also the nominal stress intensity factor K c * are practically independent of the grain size of the alloy AMg6. |
2. | The ultrafine-grained structure somewhat reduces the endurance of the alloy AMg6 in the region of low cycle fatigue and increases endurance and fatigue limit in the region of multicycle fatigue. |
3. | Reduced grain size is accompanied by increased resistance to fatigue crack nucleation in alloy AMg6. |
4. | Alloy AMg6 with ultrafine-grained structure is isotropic in crack resistance, and with coarse-grained structure it is anisotropic. The highest fatigue crack growth rate is found in transverse speciment of coarse-grained material. |
5. | The effect of the grain size on crack resistance depends on the change of the ratio of resistance to crack nucleation and growth at high and low stress levels under conditions of variable loading. |
7.
V. A. Bobkov Yu. I. Ron’shin A. P. Kudryashov V. Yu. Mashentsev 《Programming and Computer Software》2014,40(4):159-165
A method of visual navigation by stereoimages for autonomous underwater vehicles is suggested. Two modifications of the method are considered. The first one is based on integration of measurement data of onboard navigation system with visual data. The second modification relies on the use of a six-cloud computation scheme. Results of computational experiments with model data are presented. 相似文献
8.
V. M. Emelyanov A. S. Abramov A. V. Bobyl V. N. Verbitsky A. S. Gudovskikh E. M. Ershenko S. A. Kudryashov E. I. Terukov O. I. Chosta M. Z. Shvarts 《Semiconductors》2013,47(9):1252-1257
The photoinduced degradation of the i-α-Si:H layer in tandem photovoltaic converters based on α-Si:H/μc-Si:H structures is analyzed in terms of the “H-collision-” and “floating-bond” models and modifications of these. It is shown that the form of the degradation dependence is well described by all models under consideration. Compared with the modified models, the original “H-collision-” and “floating-bond” models yield estimates for saturated dangling-bond concentrations, which are always dependent on the intensity of the light that caused the degradation. The modified “floating-bond” model makes it possible to exclude this dependence, and the modified “H-collision” model describes the occurrence of this dependence in a certain range of illumination intensities and its absence in another range, which is in best agreement with experimental data. 相似文献
9.
10.
A method is proposed for calculating tool-setup parameters in intermittent thread cutting such that tool life is extended. 相似文献