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41.
V. I. Simakov Yu. Yu. Gorbanev T. E. Ivakhnenko V. G. Zaletov K. A. Lyssenko Z. A. Starikova E. P. Ivakhnenko V. I. Minkin 《Russian Chemical Bulletin》2009,58(7):1361-1370
The reaction of di(tert-butyl) derivatives of pyrocatechol with 2,6-dihydroxyaniline afforded 2,4,6,8-tetra(tert-butyl)-9-hydroxyphenoxazin-1-one. The chemical properties of the reaction product and its ability to form complexes with
metal salts as the tridentate ligand were investigated. The structure of hydroxyphenoxazinone was established by X-ray diffraction. 相似文献
42.
R. F. Trunin G. V. Boriskov S. I. Belov A. I. Bykov R. I. Il’kaev G. V. Simakov V. D. Urlin A. N. Shuikin 《JETP Letters》2005,82(5):284-286
The results of experiments on determining the shock-wave compression of initially solid hydrogen (protium) in the pressure range from 17 to 66 GPa are reported. The data have been obtained by using spherical explosive charges. Pressure in samples is created by the impact of a steel striker accelerated to maximum velocities of 23 km/s. Gaseous protium is converted to the solid state using a special cryogenic cooling system. 相似文献
43.
A linear method is developed for calculating the electronic structure of partially ordered alloys based on multiple scattering theory. This method makes it possible to describe the properties of a system (atomic, magnetic, etc.) having various degrees of order within a single approach. The proposed linearization scheme reduces the amount of and increases the speed of the calculations in obtaining the electronic structure of complicated multicomponent systems possessing arbitrary degrees of long range order.V. D. Kuznetsov Siberian Physicotechnical Institute (SFTI), Tomsk State University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 52–59, May, 1993. 相似文献
44.
O. V. Komova A. V. Simakov L. T. Tsykoza N. N. Sazonova A. V. Ushakov G. B. Barannik Z. R. Ismagilov 《Reaction Kinetics and Catalysis Letters》1995,54(2):371-379
Cu–Ti–O catalysts activity in the reactions of complete oxidation of CO and C4H10, selective catalytic reduction of NO by ammonia, SO2 oxidation to SO3, as well as the catalyst resistance to sulfur poisoning were studied. We suggest these catalysts for the combined removal of NO, CO and toxic organics from flue gases. 相似文献
45.
N. N. Simakov 《Technical Physics》2013,58(4):481-485
To investigate the influence of a strongly turbulent incoming flow on the hydrodynamic drag of a body and occurrence of the early crisis of drag, a numerical experiment is conducted in which a free gas flow about a sphere is simulated for two cases, namely, for a laminar flow and for a strongly turbulent flow. Turbulence is simulated by assuming a high kinematic coefficient of turbulent viscosity. Calculation data lead us to conclude that the early crisis of drag at Reynolds numbers near 100, which shows up as a considerable (four-to sevenfold) decrease in the hydrodynamic force and the drag coefficient of the body, can be explained by the strong turbulence of the incoming flow. 相似文献
46.
Differential Equations - We consider a boundary value problem for a singularly perturbed system of two second-order ordinary differential equations with distinct powers of the small parameter... 相似文献
47.
N. N. Simakov 《Technical Physics》2017,62(7):1006-1012
A numerical experiment on the simulation of the two-phase flow formed during spraying of a liquid by a nozzle has been described. The radial and axial velocity profiles of the droplets and gas in the free spray and in the two-phase flow through a cylindrical apparatus have been calculated and represented taking into account the early drag crisis of droplets and peculiarities of turbulent friction in the gas, which was detected in previous experiments. The distinguishing feature of the numerical model of the two-phase flow is that it employs the differential equations describing the nonstationary flow of a compressible gas as the initial equations. In transition to their difference analog, the familiar Lax–Wendorff algorithm has been used. A comparison of the results of calculations based on this model with experimental data has demonstrated their concordance. 相似文献
48.
Quantitative, comprehensive, analytical model for magnetic reconnection in Hall magnetohydrodynamics
Dissipation-independent, or "fast", magnetic reconnection has been observed computationally in Hall magnetohydrodynamics (MHD) and predicted analytically in electron MHD. However, a quantitative analytical theory of reconnection valid for arbitrary ion inertial lengths, d{i}, has been lacking and is proposed here for the first time. The theory describes a two-dimensional reconnection diffusion region, provides expressions for reconnection rates, and derives a formal criterion for fast reconnection in terms of dissipation parameters and d{i}. It also confirms the electron MHD prediction that both open and elongated diffusion regions allow fast reconnection, and reveals strong dependence of the reconnection rates on d{i}. 相似文献
49.
O. V. Komova L. T. Tsykoza A. V. Simakov A. V. Ushakov V. A. Bolshov G. B. Barannik Z. R. Asmagilov 《Reaction Kinetics and Catalysis Letters》1994,52(1):129-137
Physico-chemical properties of Cu–Ti oxide catalysts have been studied. The effect of parent titanium dioxide properties (specific surface, preparation procedures) on the state of Cu ions on the anatase surfaces has been revealed. 相似文献
50.