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1.
V. A. Petukhov N. P. Bublik P. A. Gusev L. D. Gutkin O. I. Solntsev 《High Temperature》2016,54(1):99-104
We investigate the influence of the initiation energy on the development of burning in hydrogen–air mixtures with an hydrogen content of 7–31% (volume). We initiated the mixtures in the center of the spherical reaction volume, 7–40 m3 in size, by energies from 1 J up to 4600 J. The reaction volume was bordered by a thin rubber envelope and located inside the 910 m3 spherical explosion chamber. We registered the flame front movement by means of the ionization sensors, the video camera, and the high-speed video camera. 相似文献
2.
A. I. Voronin V. T. Bublik N. Yu. Tabachkova Yu. M. Belov 《Journal of Electronic Materials》2011,40(5):794-800
In this work, we used x-ray structural diagnostic data to reveal the formation of structural regularities in profiled polycrystalline
ingots based on Bi and Sb chalcogenide solid solutions. In Bi2Te3 lattice crystals, the solid phase grows such that the cleavage surfaces are perpendicular to the crystallization front. The
crystallization singularity determines the nature of the growth texture. Because texture is an important factor determining
the anisotropy of properties, which in turn determines the suitability of an ingot for production of modules and the possibility
of figure of merit improvement, its diagnostics is an important issue for technology testing. Examples of texture analysis
using the method of straight pole figure (SPF) construction for profiled crystals are provided. The structure of the surface
layers in the profiled ingots was studied after electroerosion cutting. In addition, the method of estimation of the disturbed
layer depth based on the nature of texture changes was used. 相似文献
3.
V. T. Bublik A. I. Voronin E. A. Vygovskaya V. F. Ponomarev N. Yu. Tabachkova O. V. Toropova 《Inorganic Materials》2011,47(14):1563-1568
An analysis of anisotropy of the properties of a Bi2Se0.3Te2.7 solid solution was carried out using construction of demonstrative surfaces for thermoelectric effectiveness and thermal
expansion coefficients. It is shown that the texture is an important factor forming anisotropy of properties and technological
fitness of ingots for manufacturing modules. Anisotropy of properties based on the studies of the ingot textures obtained
using the float-zone method and Bridgman method (growing thermoelectric plates in a flat cavity) was studied. 相似文献
4.
A. Y. Polyakov N. B. Smirnov A. V. Govorkov A. A. Shlensky M. G. Mil’vidskii S. J. Pearton N. N. Faleev V. T. Bublik K. D. Chsherbatchev A. Osinsky P. E. Norris V. A. Dravin R. G. Wilson 《Journal of Electronic Materials》2002,31(5):384-390
High-resolution x-ray diffraction patterns and 90 K microcathodoluminescence (MCL) spectra were taken for undoped, symmetric AlGaN/GaN superlattices (SLs) with GaN quantum-well (QW) widths of 35 Å and 80 Å. The short-period SL spectra were blue shifted by about 60 meV compared to the GaN substrate, and the magnitude of the blue shift was increased by about 20 meV by application of a reverse bias of ?3 V (electric field of about 4 · 105 V/cm) to a Schottky diode prepared on this SL. A small red shift of about 40 meV compared to GaN was observed for the long-period SL. The two latter observations were interpreted as manifestations of the presence of a strong built-in piezoelectric field, giving rise to the quantum-confined Stark effect (QCSE). Partial disordering of the short-period SL was observed after Ar ion implantation (energy 150 keV, dose 8·1013 cm?2 and 80 keV, 2·1013 cm?2) and subsequent annealing at 1000°C for 3 h under the protective layer of Si3N4. However, it was observed that this partial disordering was accompanied by strain relaxation via formation of misfit dislocations or cracks. 相似文献
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B. N. Bublik 《Cybernetics and Systems Analysis》1993,29(4):618-622
Translated from Kibernetika i Sistemnyi Analiz, No. 4, pp. 174–177, July–August, 1993. 相似文献
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O. A. Novodvorsky L. S. Gorbatenko V. Ya. Panchenko O. D. Khramova Ye. A. Cherebilo C. Wenzel J. W. Bartha V. T. Bublik K. D. Shcherbachev 《Semiconductors》2009,43(4):419-424
The n-ZnO films doped with Ga to the content 2.5 at % are produced by pulse laser deposition onto the (0001) oriented single crystal sapphire substrates. The transmittance spectra of the ZnO films in the range from 200 to 3200 nm are studied in relation to the Ga dopant content. It is established that an increase in the Ga content shifts the fundamental absorption edge to the blue region, but reduces the transparency of the ZnO films in the infrared spectral region. The dependence of the band gap on the level of doping with Ga is determined. The photoluminescence spectra of the ZnO films doped to different levels are recorded. It is established that the PL intensity and peak position vary unsteadily with the level of doping. X-ray diffraction studies of the structure of the films are carried out. It is found that the crystallographic parameters (the lattice constant c) of the ZnO film depend on the Ga dopant content and the conditions of deposition of the films. 相似文献