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1.
Propagation of Isothermal Flame in the Low-Pressure Thermal Decomposition of Nitrogen Trichloride 总被引:1,自引:0,他引:1
The inhibition and promotion of isothermal NCl3 flame by NOCl and H2, respectively, are explained. The crossover from the isothermal mode of flame propagation to the thermal one is analyzed for NCl3–He mixtures. Calculations based on a kinetic mechanism taking into account energy chain branching are performed, and qualitative agreement between the calculated and observed data is demonstrated. The one-dimensional problem of chain–thermal flame propagation by a chain reaction involving a nonlinear-branching step has two solutions corresponding, one corresponding the isothermal mode of flame propagation and the other corresponding to the chain–thermal one. Nonlinear chain branching shortens the time needed for thermal ignition and increases the flammability of the combustible mixture. 相似文献
2.
3.
B. V. Korzoun L. A. Makovetskaya V. A. Savchuk V. A. Rubtsov G. P. Popelnyuk A. P. Chernyakova 《Journal of Electronic Materials》1995,24(7):903-906
Twenty alloys of various compositions in the Cu2Se-Al2Se3 system were prepared and investigated. The T(x) phase diagram of the Cu2Se-Al2Se3 system was obtained from x-ray diffraction, differential thermal analysis, and microstructure investigation for the first
time. The homogeneity region of the CuAlSe2 semiconducting compound was established.
Previous articles by this author were presented with the spelling of his name as B.V. Korzun. 相似文献
4.
Muñoz-Ramírez David-Octavio García-Salgado Beatriz-Paulina Ponomaryov Volodymyr Reyes-Reyes Rogelio Sadovnychiy Sergiy Cruz-Ramos Clara 《Multimedia Tools and Applications》2021,80(9):13707-13734
Multimedia Tools and Applications - The copyright protection of three-dimensional (3D) content is a matter of interest in artistic and creative works due to the rights of the holder for the... 相似文献
5.
Alymov M. I. Seplyarskii B. S. Vadchenko S. G. Kochetkov R. A. Abzalov N. I. Rubtsov N. M. Kovalev I. D. Zelenskii V. A. Galiev F. F. 《Combustion, Explosion, and Shock Waves》2021,57(3):326-333
Combustion, Explosion, and Shock Waves - Various macrokinetic modes of interaction (self-ignition or combustion) of compact samples from nonpassivated (pyrophoric) and passivated iron nanopowders... 相似文献
6.
Recent progress in energy harvesting technologies made it possible to build sensor networks with rechargeable nodes which target an indefinitely long operation. In these networks, the goal of energy management is to allocate the available energy such that the important performance metrics, such as the number of detected threats, are maximized. As the harvested energy is not sufficient for continuous operation, the scheduling of the active and inactive time is one of the main components of energy management. The active time scheduling protocols need to maintain the energy equilibrium of the nodes, while considering the uncertainties of the energy income, which is strongly influenced by the weather, and the energy expenditures, which are dependent on the behavior of the targets. In this paper, we describe and experimentally compare three active time scheduling protocols: (a) static active time, (b) dynamic active time based on a multi-parameter heuristic and (c) utility-based uniform sensing. We show that protocols which take into consideration the probabilistic models of the energy income and expenditure and can dynamically adapt to changes in the environment, can provide a significant performance advantage. 相似文献
7.
Volodymyr I. Ponomaryov 《Journal of Real-Time Image Processing》2007,1(3):173-194
The paper presents a review of the author’s own results obtained in the last several years. Some examples of real-time processing
of 2D and 3D images are described. In particular, we discuss the noise model and objective criteria that can be applied to
characterize the performance of the processing algorithms. Several proposed algorithms based on RM approach are compared with
other known ones, demonstrating the advantages in noise suppressing and preservation of fine image details and edges. A number
of 2D and 3D image denoising filters are implemented on DSP, realizing real-time mode in the image processing. The performances
of the proposed processing algorithms and the known ones are discussed and evaluated here.
相似文献
Volodymyr I. PonomaryovEmail: |
8.
Alexander V. Makievski Volodymyr I. Kovalchuk Jürgen Krägel Madine Simoncini Libero Liggieri M. Ferrari Piero Pandolfini Giuseppe Loglio Reinhard Miller 《Microgravity science and technology》2005,16(1-4):215-218
The present work shows the first experimental and theoretical results for investigations on the rheology of liquid films. The experiments are planned to be performed under microgravity conditions. This environment will allow forming films of different thickness, which is impossible under ground conditions due to drainage. Then the films are forced to harmonic oscillations of the film area so that the film elasticity can be measured as a function of frequency. The presented theoretical model demonstrates the main relationships to be solved under corresponding boundary conditions 相似文献
9.
Andriy V. Kozytskiy Oleksandr L. Stroyuk Stepan Ya. Kuchmiy Volodymyr M. Dzhagan Dietrich R. T. Zahn Mykola A. Skoryk Vyacheslav O. Moskalyuk 《Journal of Materials Science》2013,48(21):7764-7773
Nanocrystalline ITO/ZnO films formed by porous zinc oxide microplatelets 1–3 μm in size and 100–200 nm in thickness, which consist of 30–50 nm ZnO crystallites, were sensitized to visible light by Cd x Zn1?x S nanocrystals deposited using the method of successive ionic layer adsorption and reaction (SILAR). The composition of Cd x Zn1?x S nanocrystals as well as the dependence between molar Cd(II) fraction in the films and the ratio of cadmium and zinc nitrate concentrations in solutions used for the SILAR procedure were determined by a combination of electron, Raman, and energy-dispersive X-ray spectroscopies. The photovoltage observed at illumination of the ITO/ZnO/Cd x Zn1?x S heterostructures by white light (λ >400 nm) in aqueous Na2S solution increases with a decrease of Cd(II) content proportionally to an increment in the conduction band potential of the Cd x Zn1?x S nanocrystals. The photocurrent density normalized to the light absorbance of the ITO/ZnO/Cd x Zn1?x S films increases by a factor of around four when the conduction band potential of Cd x Zn1?x S nanocrystals grows by 220 mV as a result of Cd(II) fraction changing from 1.0 to 0.62–0.67. The results show that Cd x Zn1?x S solid solutions are more advantageous sensitizers for the short-wavelength part of the sensitivity window of the liquid-junction solar cells (400–450 nm) than conventionally used cadmium sulfide. 相似文献
10.
Chloride and Indium‐Chloride‐Complex Inorganic Ligands for Efficient Stabilization of Nanocrystals in Solution and Doping of Nanocrystal Solids 下载免费PDF全文
Vladimir Sayevich Chris Guhrenz Maria Sin Volodymyr M. Dzhagan Alexander Weiz Daniel Kasemann Eike Brunner Michael Ruck Dietrich R. T. Zahn Karl Leo Nikolai Gaponik Alexander Eychmüller 《Advanced functional materials》2016,26(13):2163-2175
Here, the surface functionalization of CdSe and CdSe/CdS core/shell nanocrystals (NCs) with compact chloride and indium‐chloride‐complex ligands is reported. The ligands provide not only short interparticle distances but additionally control doping and passivation of surface trap states, leading to enhanced electronic coupling in NC‐based arrays. The solids based on these NCs show an excellent electronic transport behavior after heat treatment at the relatively low temperature of 190 °C. Indeed, the indium‐chlorido‐capped 4.5 nm CdSe NC based thin‐film field‐effect transistor reaches a saturation mobility of μ = 4.1 cm2 (V s)?1 accompanied by a low hysteresis, while retaining the typical features of strongly quantum confined semiconductor NCs. The capping with chloride ions preserves the high photoluminescence quantum yield ( ≈ 66%) of CdSe/CdS core/shell NCs even when the CdS shell is relatively thin (six monolayers). The simplicity of the chemical incorporation of chlorine and indium species via solution ligand exchange, the efficient electronic passivation of the NC surface, as well as their high stability as dispersions make these materials especially attractive for wide‐area solution‐processable fabrication of NC‐based devices. 相似文献