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排序方式: 共有181条查询结果,搜索用时 593 毫秒
1.
VladimirV.Primachenko ValeriyV.Martynenko 《中国耐火材料》2003,12(3):25-29
The article gives an introduction to the Ukrainian Research Institute of Refractories and especially its R D and refractory products for the industries of iron and steel,nonferrous,glass and chemistry etc. 相似文献
2.
Matveenko O. S. Gnatyuk D. L. Bugaev A. S. Pavlov A. Yu. Gamkrelidze S. A. Galiev R. R. Zuev A. V. Fedorov Yu. V. Lavrukhin D. V. Mikhalev A. O. Zenchenko N. K. 《Russian Microelectronics》2022,51(3):149-154
Russian Microelectronics - A set of monolithic integrated circuits (MICs) in the 22–25 GHz range based on gallium nitride nanoheterostructures on sapphire substrates is designed, produced,... 相似文献
3.
Li F Seillier-Moiseiwitsch F Korostyshevskiy VR 《Computational statistics & data analysis》2011,55(11):3059-3072
A new comprehensive procedure for statistical analysis of two-dimensional polyacrylamide gel electrophoresis (2D PAGE) images is proposed, including protein region quantification, normalization and statistical analysis. Protein regions are defined by the master watershed map that is obtained from the mean gel. By working with these protein regions, the approach bypasses the current bottleneck in the analysis of 2D PAGE images: it does not require spot matching. Background correction is implemented in each protein region by local segmentation. Two-dimensional locally weighted smoothing (LOESS) is proposed to remove any systematic bias after quantification of protein regions. Proteins are separated into mutually independent sets based on detected correlations, and a multivariate analysis is used on each set to detect the group effect. A strategy for multiple hypothesis testing based on this multivariate approach combined with the usual Benjamini-Hochberg FDR procedure is formulated and applied to the differential analysis of 2D PAGE images. Each step in the analytical protocol is demonstrated by using an actual dataset. The effectiveness of the proposed methodology is shown using simulated gels in comparison with the commercial software packages PDQuest and Dymension. We also introduce a new procedure for simulating gel images. 相似文献
4.
Effect of lubricating oils on friction of steel over ceramics + monocrystal carbon composite coating
I. A. Buyanovsky A. N. Bolshakov V. A. Levchenko V. N. Matveenko 《Journal of Friction and Wear》2014,35(2):129-132
The effect of mineral and synthetic lubricating oils on the antifriction behavior of specially synthesized ceramics + monocrystal carbon (m-carbon) nanocomposite coatings has been revealed. It was previously found that the use of m-carbon coatings ensured the formation of highly ordered boundary film, which had a high thermal stability and good antifriction characteristics, under boundary lubrication. 相似文献
5.
In this paper, a new model-based engineering approach is introduced by bridging MATLAB Simulink with IEC61499 Function Block models. This is achieved by a transformation between the two block-diagram languages. The transformation supported by the developed tools sets the cornerstone of the verification and validation framework for IEC 61499 Function Blocks in closed-loop with the models of the plant. The framework also paves the way to running distributed simulations of complex hybrid (i.e., continuous-discrete) closed-loop plant-controller systems and building complex models using the efficient object instantiation techniques of IEC 61499. 相似文献
6.
7.
Oleg Vasylkiv Yoshio Sakka Valeriy V. Skorokhod 《Journal of the American Ceramic Society》2006,89(6):1822-1826
CeCl3 ·7H2 O and GdCl3 ·6H2 O that were dissolved in water were precipitated with urea (NH2 CONH2 ) to produce matrix agglomerates for three-component nano-reactors. Mixing hexamethylenetetramine with dilute nitric acid resulted in the formation of well-dispersed nano-particles of cyclotrimetilene trinitramine (C3 H6 N6 O6 ) (RDX) in the solvent. Nano-reactors were produced by impregnating the nano-C3 H6 N6 O6 into the matrix agglomerates of an intermediate complex of cerium and gadolinium compounds. Blast initiation of the C3 H6 N6 O6 resulted in extremely rapid detonation and gaseous products formation at temperatures of 2000°–5000°C, which were compressed into a volume nearly equal to the initial volume of each RDX nano-particle. Multiple "nano-blasts" occurred in the volume of each nano-reactor. The impact of the blast waves led to fragmentation of the surrounding matter. The evolution of a large volume of gaseous products dissipated the heat of the process and limited temperature increase, thus reducing the possibility of local sintering among the primary particles. The short-term high temperature generated during the blasts enhanced the solid solubility of the metal oxides. Uniform aggregates of 22∼74 nm consisting of 6∼14 nm crystallites of gadolinia in ceria solid solution were synthesized. 相似文献
8.
Oleg Vasylkiv Yoshio Sakka Valeriy V. Skorokhod 《Journal of the American Ceramic Society》2003,86(2):299-304
The 1.5- to 3-mol%-Y2 O3 -stabilized tetragonal ZrO2 (Y-TZP) and Al2 O3 /Y-TZP nanocomposite ceramics with 1 to 5 wt% of alumina were produced by a colloidal technique and low-temperature sintering. The influence of the ceramic processing conditions, resulting density, microstructure, and the alumina content on the hardness and toughness were determined. The densification of the zirconia (Y-TZP) ceramic at low temperatures was possible only when a highly uniform packing of the nanoaggregates was achieved in the green compacts. The bulk nanostructured 3-mol%-yttria-stabilized zirconia ceramic with an average grain size of 112 nm was shown to reach a hardness of 12.2 GPa and a fracture toughness of 9.3 MPa·m1/2 . The addition of alumina allowed the sintering process to be intensified. A nanograined bulk alumina/zirconia composite ceramic with an average grain size of 94 nm was obtained, and the hardness increased to 16.2 GPa. Nanograined tetragonal zirconia ceramics with a reduced yttria-stabilizer content were shown to reach fracture toughnesses between 12.6–14.8 MPa·m1/2 (2Y-TZP) and 11.9–13.9 MPa·m1/2 (1.5Y-TZP). 相似文献
9.
Giovanni Bruno Alexander Efremov Bryan Wheaton Ivan Bobrikov Valeriy G. Simkin Scott Misture 《Journal of the European Ceramic Society》2010,30(12):2555-2562
The lattice expansion of aluminum titanate (AT) obtained by firing a mixture of alumina, rutile, strontium and calcium carbonate and silica was measured using neutron and laboratory X-ray diffraction. The microscopic data are compared with macroscopic measurement completed by dilatometry.A powder and a compact rod sample were compared to assess the influence of micro residual stresses locked into the solid structure at grain level, which could possibly be relieved upon grinding.Results show good correlation between neutron and X-ray diffraction techniques. They also show that a compact material behaves differently than a powder, contrary to what happens for other porous ceramics such as cordierite. The integrity factor model was used to rationalize the results and predict grain level stresses in all crystal directions and all phases (AT, Strontium aluminum silicate, alumina and residual glass). Calculation show that the AT c-axis is always under compression while all other crystal directions and phases are under tension. Those micro-stresses do not undermine the macroscopic mechanical properties of the material and confer to it its interesting properties like low thermal expansion and enhanced strain tolerance. 相似文献
10.