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排序方式: 共有141条查询结果,搜索用时 15 毫秒
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V.?I.?Erofeev A.?V.?IlyahinskiiEmail author E.?A.?Nikitina V.?M.?Rodyushkin 《Russian Journal of Nondestructive Testing》2018,54(2):92-95
As exemplified by the use of different approaches to processing the results of probing metals with elastic waves, means have been studied for increasing the sensitivity of the ultrasonic method. Representing processes that determine the effect that a medium has on the parameters of an elastic wave by a statistical model in the form of a Dirichlet distribution makes it possible to numerically characterize changes in the structure of a probing pulse and to improve the understanding of phenomena that occur when an elastic wave interacts with a medium, with the degree of material damage taken into account. 相似文献
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T. A. Lapushkina R. V. Vasil’eva A. V. Erofeev S. A. Ponyaev S. V. Bobashev 《Technical Physics Letters》2004,30(9):724-726
We have studied xenon plasma moving in a supersonic diffuser in external electric and magnetic fields. The main physical parameters of the plasma (electron temperature and density) were determined using specially developed methods based on the theory of continuous optical emission from inert gas atoms. These experimental data are compared to the results of theoretical calculations. Based on an analysis of the results of spectroscopic measurements, a mechanism of plasma ionization is established which is capable of maintaining a high degree of ionization in the supersonic xenon plasma flow. 相似文献
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Technical Physics Letters - The task of controlled variation of parameters of supersonic flow past a semicylindrical aerodynamic body is considered. The action of gas-discharge plasma on the flow... 相似文献
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Selemenev M. F. Kravchenko I. N. Kuznetsov Yu. A. Velichko S. A. Erofeev M. N. Borovik T. N. Prosolov E. A. Selemeneva E. M. 《Russian Engineering Research》2021,41(9):832-835
Russian Engineering Research - Software for the simulation of low-speed machining based on the SolidWorks and Deform-3D CAD/CAE systems is analyzed. The following properties are established: the... 相似文献
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Sergey G. Kopysov Aleksandr A. Erofeev 《The International journal of environmental studies》2015,72(3):380-385
The landscape conditions for forming the water balance and runoff from catchment areas can change considerably under the pressure of natural and anthropogenic factors. The role of hydromorphic transformation of landscapes is important for most of the Ob basin; it results in the paludification of the area. The specific parameter n is used in calculating water balance according to Mezentsev’s method of hydro-climatic calculations to take account of landscape conditions. We suggest determining this parameter’s value by geomorphological features of the landscapes using GIS tools. 相似文献
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A. L. Lapidus A. Yu. Krylova Ya. V. Mikhailova L. V. Sineva A. B. Erofeev 《Solid Fuel Chemistry》2011,45(2):71-80
The effect of the nature of the support of a Co catalyst on the synthesis of hydrocarbons from CO, H2, and C2H4 was studied in this work. It was found that the introduction of ethylene into synthesis gas resulted in an increase in the
yield of liquid hydrocarbons. In this case, the conversion of C2H4 was complete and the degree of its involvement into the synthesis of C5+ hydrocarbons depended on the concentration of this component in the starting mixture and the nature of the support. Specific
features of the adsorption of CO and C2H4 on the used Co catalysts were determined using a temperature-programmed desorption method. 相似文献